Benchmarking privacy and utility in synthetic tabular cohorts for Alzheimer's disease research.
The 7 matches · 1 of them tie a paragraph to a whole file, not to given lines: a weak match, whose lines are not tinted
- [1] § METHODS › Privacy evaluation ↔ R/benchmark.plots.R, lines 273–317 · score 0.67 · privacy loss, hitting rate, identifiability risk, ADR, NNDR, NNAA
- [2] § RESULTS › Privacy analysis ↔ R/bmk_ctgan.R, the whole file · a weak match · score 0.60 · confidence interval, hitting rate, identifiability risk, recall, MIA, CTGAN
- [3] § RESULTS › Privacy analysis ↔ R/bmk_degrees.R, lines 1–72 · score 0.59 · confidence interval, hitting rate, identifiability risk, recall, MIA, score
- [4] § METHODS › Generating synthetic tabular data ↔ python/bayesian_synthesizing.py, lines 17–59 · score 0.56 · correlated attribute mode, Bayesian networks, root, privacy
- [5] § METHODS › Utility evaluation › Missing values ↔ python/train_svm.py, lines 108–116 · score 0.56 · IterativeImputer, SimpleImputer, imputed, training
- [6] § METHODS › Utility evaluation › Missing values ↔ python/main_ctgan.py, lines 31–43 · score 0.56 · IterativeImputer, SimpleImputer, imputed, CTGAN
- [7] § METHODS › Privacy evaluation ↔ python/eval_benchmark.py, lines 111–140 · score 0.53 · SynthEval, hitting rate, NNDR, benchmarking, NNAA, MIA
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The authors' code
R · 717 lines · 28 KB · MIT · 1 match
- library(dplyr)
- library(Rmisc)
- library(ggplot2)
- library(ggpubr)
- library(stringr)
- library(ggforce)
- library(paletteer)
- library(ggsci)
- ##### ADNI #####
- epsilons <- c(5, 10, 50, 100, 200, NA)
- samples <- c(rep(100, length(epsilons)-length(which(is.na(epsilons)))), 18)
- file_paths <- paste0("~/Python/WASP-DDLS/SE-benchmark/adni/bmk_new_deg2_eps", ifelse(is.na(epsilons), "zero", epsilons), ".csv")
- # Read CSVs in a loop
- res_list <- list()
- for (i in seq_along(epsilons)) {
- df <- read.csv(file_paths[i])
- df$Epsilon <- epsilons[i]
- df$samples <- samples[i]
- res_list[[i]] <- df
- }
- # Combine all data frames
- bmk_ds <- bind_rows(res_list)
- util_cols <- c("mutual_inf_diff_value", "ks_tvd_stat_value",
- "frac_ks_sigs_value","avg_F1_diff_value", "avg_F1_diff_hout_value",
- "nnaa_value")
- priv_cols <- c("priv_loss_nndr_value", "priv_loss_nnaa_value","hit_rate_value",
- "avg_nndr_value", "eps_identif_risk_value", "priv_loss_eps_value",
- "mia_recall_value", "att_discl_risk_value")
- cols <- c(util_cols, priv_cols)
- bmk_ds$Epsilon <- bmk_ds %>%
- select(Epsilon) %>%
- mutate_all(~replace(., is.na(.), 0)) %>%
- mutate(Epsilon = factor(Epsilon, levels = as.character(unique(Epsilon)))) %>%
- pull(Epsilon)
- # CTGAN
- epochs <- c(750)
- setting <- c("default", "optim")
- file_paths <- paste0("~/Python/WASP-DDLS/SE-benchmark/adni/bmk_new_ctgan_", setting, "_epochs_", epochs, ".csv")
- #file_paths <- c(file_paths, "~/Python/WASP-DDLS/SE-benchmark/bmk_ctgan_epochs_100.csv")
- # Read CSVs in a loop
- res_list <- list()
- for (i in seq_along(file_paths)) {
- df <- read.csv(file_paths[i])
- df$Epochs <- epochs[i]
- df$samples <- 100
- res_list[[i]] <- df
- }
- # Combine all data frames
- bmk_ctgan <- bind_rows(res_list)
- bmk_ctgan$Epochs <- as.factor(bmk_ctgan$Epochs)
- # Synthpop
- bmk_synthpop <- read.csv("~/Python/WASP-DDLS/SE-benchmark/adni/bmk_synthpop_2.csv") %>% mutate(
- Epochs = 0,
- samples = 100
- )
- # TabPFN
- temps <- c('1.0', '0.75', '0.5', '0.25')
- file_paths <- paste0("~/Python/WASP-DDLS/SE-benchmark/adni/bmk_new_tabpfn_t_", temps, ".csv")
- # Read CSVs in a loop
- res_list <- list()
- for (i in seq_along(file_paths)) {
- df <- read.csv(file_paths[i])
- df$temp <- temps[i]
- df$samples <- 100
- res_list[[i]] <- df
- }
- # Combine all data frames
- bmk_tabpfn <- bind_rows(res_list)
- bmk_tabpfn$temp <- as.factor(bmk_tabpfn$temp)
- label_list = c("DS (5)", "DS (10)","DS (50)","DS (100)",
- "DS (200)", "DS w/o DP", "CTGAN (default)", "CTGAN (optimal)",
- "Synthpop",
- "TabPFN (t=1.0)", "TabPFN (t=0.75)", "TabPFN (t=0.5)", "TabPFN (t=0.25)")
- util_df_adni <- rbind(select(bmk_ds, dataset, model, all_of(util_cols)),
- select(bmk_ctgan, dataset, model, all_of(util_cols)),
- select(bmk_synthpop, dataset, model, all_of(util_cols)),
- select(bmk_tabpfn, dataset, model, all_of(util_cols))) |>
- dplyr::mutate(avg_F1_diff_value = abs(avg_F1_diff_value),
- avg_F1_diff_hout_value = abs(avg_F1_diff_hout_value)) |>
- dplyr::mutate(mutual_inf_diff = 1 - tanh(mutual_inf_diff_value),
- ks_tvd_stat = 1 - ks_tvd_stat_value,
- frac_ks_sigs = 1 - frac_ks_sigs_value,
- avg_F1_diff = 1 - abs(avg_F1_diff_value),
- avg_F1_diff_hout = 1 - abs(avg_F1_diff_hout_value),
- nnaa = 1 - nnaa_value)
- util_df_adni$util_score <- util_df_adni |> dplyr::select(c(mutual_inf_diff, ks_tvd_stat, frac_ks_sigs, avg_F1_diff, avg_F1_diff_hout, nnaa)) |> rowMeans()
- util_df_adni$Method <- factor(util_df_adni$dataset, levels = unique(util_df_adni$dataset),
- labels=label_list)
- priv_df_adni <- rbind(select(bmk_ds, dataset, model, all_of(priv_cols)),
- select(bmk_ctgan, dataset, model, all_of(priv_cols)),
- select(bmk_synthpop, dataset, model, all_of(priv_cols)),
- select(bmk_tabpfn, dataset, model, all_of(priv_cols))) |>
- dplyr::mutate(priv_loss_nndr = 1 - abs(priv_loss_nndr_value),
- priv_loss_nnaa = 1 - abs(priv_loss_nnaa_value),
- priv_loss_eps = 1 - abs(priv_loss_eps_value),
- hit_rate = 1 - hit_rate_value,
- eps_identif_risk = 1 - eps_identif_risk_value,
- mia_recall = 1 - mia_recall_value,
- att_discl_risk = 1 - att_discl_risk_value)
- priv_df_adni$priv_score <- priv_df_adni |> dplyr::select(c(priv_loss_nndr, priv_loss_nnaa, priv_loss_eps, hit_rate, eps_identif_risk, att_discl_risk)) |> rowMeans()
- priv_df_adni$Method <- factor(priv_df_adni$dataset, levels = unique(priv_df_adni$dataset),
- labels=label_list)
- up_df_adni <- util_df_adni |> dplyr::select(c(Method, model, util_score)) |>
- dplyr::inner_join(priv_df_adni |> dplyr::select(c(Method, model, priv_score)), by = c("Method", "model"))
- colormap <- c(
- paletteer_d("rcartocolor::BluYl")[1:6],
- paletteer_d("beyonce::X58")[3:4],
- "#663399",
- paletteer_d("ggsci::cyan_material")[c(1,3,5,7)]
- )
- up_plot_adni <- ggplot(data = up_df_adni, aes(x=util_score, y=priv_score, fill=Method)) +
- geom_point(pch=21, color = "black", size=3) +
- labs(title = "ADNI", x = "Utility", y = "Privacy") +
- #scale_fill_paletteer_d("rcartocolor::BluYl") +
- scale_fill_manual(values = colormap) +
- theme_minimal() +
- ylim(0.7,1.0) + xlim(0.3,0.85)
- plot(up_plot_adni)
- #ggsave("~/R/DDLS-plots/up_plot.png", up_plot, width = 7, height = 5, units = "in", dpi = 500)
- ###### A4 #########
- epsilons <- c(5, 10, 50, 100, 200, NA)
- samples <- c(rep(100, length(epsilons)-length(which(is.na(epsilons)))), 23)
- file_paths <- paste0("~/Python/WASP-DDLS/SE-benchmark/a4/bmk_new_deg2_eps", ifelse(is.na(epsilons), "zero", epsilons), ".csv")
- # Read CSVs in a loop
- res_list <- list()
- for (i in seq_along(epsilons)) {
- df <- read.csv(file_paths[i])
- df$Epsilon <- epsilons[i]
- df$samples <- samples[i]
- res_list[[i]] <- df
- }
- # Combine all data frames
- bmk_ds <- bind_rows(res_list)
- util_cols <- c("mutual_inf_diff_value", "ks_tvd_stat_value",
- "frac_ks_sigs_value","avg_F1_diff_value", "avg_F1_diff_hout_value",
- "nnaa_value")
- priv_cols <- c("priv_loss_nndr_value", "priv_loss_nnaa_value","hit_rate_value",
- "avg_nndr_value", "eps_identif_risk_value", "priv_loss_eps_value",
- "mia_recall_value", "att_discl_risk_value")
- cols <- c(util_cols, priv_cols)
- bmk_ds$Epsilon <- bmk_ds %>%
- select(Epsilon) %>%
- mutate_all(~replace(., is.na(.), 0)) %>%
- mutate(Epsilon = factor(Epsilon, levels = as.character(unique(Epsilon)))) %>%
- pull(Epsilon)
- # CTGAN
- epochs <- c(750)
- setting <- c("default", "optim")
- file_paths <- paste0("~/Python/WASP-DDLS/SE-benchmark/a4/bmk_new_ctgan_", setting, "_epochs_", epochs, ".csv")
- #file_paths <- c(file_paths, "~/Python/WASP-DDLS/SE-benchmark/bmk_ctgan_epochs_100.csv")
- # Read CSVs in a loop
- res_list <- list()
- for (i in seq_along(file_paths)) {
- df <- read.csv(file_paths[i])
- df$Epochs <- epochs[i]
- df$samples <- 100
- res_list[[i]] <- df
- }
- # Combine all data frames
- bmk_ctgan <- bind_rows(res_list)
- bmk_ctgan$Epochs <- as.factor(bmk_ctgan$Epochs)
- # Synthpop
- bmk_synthpop <- read.csv("~/Python/WASP-DDLS/SE-benchmark/a4/bmk_new_synthpop.csv") %>% mutate(
- Epochs = 0,
- samples = 100
- )
- # TabPFN
- temps <- c('1.0')
- file_paths <- paste0("~/Python/WASP-DDLS/SE-benchmark/a4/bmk_new_tabpfn_t_", temps, ".csv")
- # Read CSVs in a loop
- res_list <- list()
- for (i in seq_along(file_paths)) {
- df <- read.csv(file_paths[i])
- df$temp <- temps[i]
- df$samples <- 100
- res_list[[i]] <- df
- }
- # Combine all data frames
- bmk_tabpfn <- bind_rows(res_list)
- bmk_tabpfn$temp <- as.factor(bmk_tabpfn$temp)
- label_list = c("DS (5)", "DS (10)", "DS (50)", "DS (100)", "DS (200)", "DS w/o DP",
- "CTGAN (default)", "CTGAN (optimal)",
- "Synthpop", "TabPFN (t=1.0")
- util_df_a4 <- rbind(select(bmk_ds, dataset, model, all_of(util_cols)),
- select(bmk_ctgan, dataset, model, all_of(util_cols)),
- select(bmk_synthpop, dataset, model, all_of(util_cols)),
- select(bmk_tabpfn, dataset, model, all_of(util_cols))
- ) |>
- dplyr::mutate(avg_F1_diff_value = abs(avg_F1_diff_value),
- avg_F1_diff_hout_value = abs(avg_F1_diff_hout_value)) |>
- dplyr::mutate(mutual_inf_diff = 1 - tanh(mutual_inf_diff_value),
- ks_tvd_stat = 1 - ks_tvd_stat_value,
- frac_ks_sigs = 1 - frac_ks_sigs_value,
- avg_F1_diff = 1 - abs(avg_F1_diff_value),
- avg_F1_diff_hout = 1 - abs(avg_F1_diff_hout_value),
- nnaa = 1 - nnaa_value)
- util_df_a4$util_score <- util_df_a4 |> dplyr::select(c(mutual_inf_diff, ks_tvd_stat, frac_ks_sigs, avg_F1_diff, avg_F1_diff_hout, nnaa)) |> rowMeans()
- util_df_a4$Method <- factor(util_df_a4$dataset, levels = unique(util_df_a4$dataset),
- labels=label_list)
- priv_df_a4 <- rbind(select(bmk_ds, dataset, model, all_of(priv_cols)),
- select(bmk_ctgan, dataset, model, all_of(priv_cols)),
- select(bmk_synthpop, dataset, model, all_of(priv_cols)),
- select(bmk_tabpfn, dataset, model, all_of(priv_cols))
- ) |>
- dplyr::mutate(priv_loss_nndr = 1 - abs(priv_loss_nndr_value),
- priv_loss_nnaa = 1 - abs(priv_loss_nnaa_value),
- priv_loss_eps = 1 - abs(priv_loss_eps_value),
- hit_rate = 1 - hit_rate_value,
- eps_identif_risk = 1 - eps_identif_risk_value,
- mia_recall = 1 - mia_recall_value,
- att_discl_risk = 1 - att_discl_risk_value)
- priv_df_a4$priv_score <- priv_df_a4 |> dplyr::select(c(priv_loss_nndr, priv_loss_nnaa, priv_loss_eps, hit_rate, eps_identif_risk, att_discl_risk)) |> rowMeans()
- priv_df_a4$Method <- factor(priv_df_a4$dataset, levels = unique(priv_df_a4$dataset),
- labels=label_list)
- up_df_a4 <- util_df_a4 |> dplyr::select(c(Method, model, util_score)) |>
- dplyr::inner_join(priv_df_a4 |> dplyr::select(c(Method, model, priv_score)), by = c("Method", "model"))
- up_df_a4 <- up_df_a4 %>% mutate(Framework = as.factor(gsub(" .*", "", Method)))
- #up_df$Method <- factor(up_df$dataset, levels = unique(up_df$dataset),
- # labels=c("DS (eps=5)", "DS (eps=10)", "DS (eps=25)","DS (eps=50)","DS (eps=100)",
- # "DS (eps=200)", "DS w/o DP", "CTGAN (10 epochs)",
- # "CTGAN (50 epochs)", "CTGAN (100 epochs)", "Synthpop"))
- colormap <- c(
- paletteer_d("rcartocolor::BluYl")[1:6],
- paletteer_d("beyonce::X58")[3:4],
- "#663399",
- paletteer_d("ggsci::cyan_material")[c(1,3,5,7)]
- )
- up_plot_a4 <- ggplot(data = up_df_a4, aes(x=util_score, y=priv_score, fill=Method)) +
- geom_point(pch=21, color="black", size=3) +
- labs(title = "A4", x = "Utility", y = "Privacy") +
- #scale_fill_paletteer_d("rcartocolor::BluYl") +
- scale_fill_manual(values = colormap) +
- theme_minimal() +
- ylim(0.7,1.0) + xlim(0.3,0.85)
- #plot(up_plot_a4)
- up_plot <- ggarrange(up_plot_adni, up_plot_a4, nrow=2, common.legend = TRUE, legend = "right")
- plot(up_plot)
- #ggsave("~/R/DDLS-plots/up_plot.jpg", up_plot, width = 7, height = 10, units = "in", dpi = 1000)
- ###### GRIDS OF METRICS ######
- library(lme4)
- # Privacy grid
- privs <- c("priv_loss_nndr_value", "priv_loss_nnaa_value", "eps_identif_risk_value", "hit_rate_value", "mia_recall_value", "att_discl_risk_value")
- priv_titels <- c(
- priv_loss_nndr_value = "NNDR privacy loss",
- priv_loss_nnaa_value = "NNAA privacy loss",
- eps_identif_risk_value = "Epsilon identifiability",
- hit_rate_value = "Hitting rate",
- mia_recall_value = "MIA",
- att_discl_risk_value = "ADR"
- )
- priv_df_adni <- priv_df_adni %>% mutate(eps_identif_risk_value = eps_identif_risk_value*100,
- hit_rate_value = hit_rate_value*100)
- priv_df_a4 <- priv_df_a4 %>% mutate(eps_identif_risk_value = eps_identif_risk_value*100,
- hit_rate_value = hit_rate_value*100)
- get_privacy_plot <- function(priv_df, p) {
- pp <- ggplot(data = priv_df, aes(x = Method, y = !!sym(p), fill = Method)) +
- labs(title = priv_titels[p],
- x = "",
- y = "") +
- scale_fill_manual(values = colormap) +
- theme_classic() +
- theme(axis.text.x = element_text(angle = 30, vjust = 1, hjust=1, size = 8))
- if(p %in% c("eps_identif_risk_value", "hit_rate_value")) {
- yval = 9.0
- pp <- pp + geom_hline(yintercept = yval, linetype = "dashed", color = "darkred") +
- geom_rect(
- xmin = -Inf, xmax = Inf,
- ymin = yval, ymax = Inf,
- fill = "grey80",
- alpha = 0.5
- )
- } else if(p %in% c("priv_loss_nndr_value", "priv_loss_nnaa_value")) {
- mu = mean(priv_df[[p]], na.rm=T)
- #m = length(unique(priv_df$Method))
- #n = nrow(priv_df)/m
- #se = sd(priv_df[[p]], na.rm=T)/sqrt(n)
- #t_crit <- qt(1 - 0.01 / (2 * m), df = round(n)-1)
- form <- as.formula(paste(p, "~ 1 + (1 | Method)"))
- fit <- lmer(form, data = priv_df)
- cis <- confint(fit, level = 0.99, parm = "(Intercept)")
- upper = cis[2]
- lower = cis[1]
- pp <- pp +
- geom_hline(yintercept = mu, linetype = "solid", color = "lightgray") +
- geom_hline(yintercept = upper, linetype = "dashed", color = "darkred", alpha=0.5) +
- geom_hline(yintercept = lower, linetype = "dashed", color = "darkred", alpha=0.5) +
- geom_rect(xmin = -Inf, xmax = Inf, ymin = upper, ymax = Inf, fill = "grey80", alpha = 0.2) +
- geom_rect(xmin = -Inf, xmax = Inf, ymin = -Inf, ymax = lower, fill = "grey80", alpha = 0.2)
- } else if(p %in% c("mia_recall_value", "att_discl_risk_value")) {
- yval = 0.5
- pp <- pp + geom_hline(yintercept = yval, linetype = "dashed", color = "darkred") +
- geom_rect(
- xmin = -Inf, xmax = Inf,
- ymin = yval, ymax = Inf,
- fill = "grey80",
- alpha = 0.5
- )
- }
- pp <- pp + geom_hline(yintercept = 0.0, linetype = "dotted", color = "black") +
- geom_boxplot()
- return(pp)
- }
- pPlotlist_adni <- list()
- pPlotlist_a4 <- list()
- for (p in privs) {
- pp_adni <- get_privacy_plot(priv_df_adni, p)
- pp_a4 <- get_privacy_plot(priv_df_a4, p)
- pPlotlist_adni[[paste0(p, "_adni")]] <- pp_adni
- pPlotlist_a4[[paste0(p, "_a4")]] <- pp_a4
- }
- priv_grid_adni <- ggarrange(plotlist = pPlotlist_adni, ncol = 2, nrow = 3, common.legend = TRUE, legend = "right")
- plot(priv_grid_adni)
- priv_grid_a4 <- ggarrange(plotlist = pPlotlist_a4, ncol = 2, nrow = 3, common.legend = TRUE, legend = "right")
- plot(priv_grid_a4)
- ggsave("~/R/DDLS-plots/priv_grid_adni.tiff", priv_grid_adni, width = 10, height = 10, units = "in", dpi = 500)
- ggsave("~/R/DDLS-plots/priv_grid_a4.tiff", priv_grid_a4, width = 10, height = 10, units = "in", dpi = 500)
- #ggsave("~/R/DDLS-plots/util_grid.png", util_grid, width = 10, height = 10, units = "in", dpi = 500)
- #ggsave("~/R/DDLS-plots/priv_grid.png", priv_grid, width = 10, height = 10, units = "in", dpi = 500)
- utils <- c("mutual_inf_diff_value", "ks_tvd_stat_value", "frac_ks_sigs_value", "avg_F1_diff_value", "avg_F1_diff_hout_value", "nnaa_value")
- # Mapping column names
- util_titles <- c(
- mutual_inf_diff_value = "MI diff",
- ks_tvd_stat_value = "KS/TVD stat",
- frac_ks_sigs_value = "Frac. KS sigs",
- avg_F1_diff_value = "Avg. Diff. F1",
- avg_F1_diff_hout_value = "Avg. Diff. F1 (test)",
- nnaa_value = "NNAA value"
- )
- get_util_plot <- function(util_df, u) {
- up <- ggplot(data = util_df, aes(x = Method, y = !!sym(u), fill = Method)) +
- labs(title = util_titles[u],
- x = "",
- y = "") +
- scale_fill_manual(values = colormap) +
- theme_classic() +
- theme(axis.text.x = element_text(angle = 30, vjust = 1, hjust=1, size = 8))
- if (u == 'nnaa_value') {
- mu = mean(util_df[[u]], na.rm=T)
- #m = length(unique(priv_df$Method))
- #n = nrow(priv_df)/m
- #se = sd(priv_df[[p]], na.rm=T)/sqrt(n)
- #t_crit <- qt(1 - 0.01 / (2 * m), df = round(n)-1)
- form <- as.formula(paste(u, "~ 1 + (1 | Method)"))
- fit <- lmer(form, data = util_df)
- cis <- confint(fit, level = 0.99, parm = "(Intercept)")
- upper = cis[2]
- lower = cis[1]
- up <- up +
- geom_hline(yintercept = mu, linetype = "solid", color = "lightgray") +
- geom_hline(yintercept = upper, linetype = "dashed", color = "darkred", alpha=0.5) +
- geom_hline(yintercept = lower, linetype = "dashed", color = "darkred", alpha=0.5) +
- geom_rect(xmin = -Inf, xmax = Inf, ymin = upper, ymax = Inf, fill = "grey80", alpha = 0.2) +
- geom_rect(xmin = -Inf, xmax = Inf, ymin = -Inf, ymax = lower, fill = "grey80", alpha = 0.2)
- } else if (u == "frac_ks_sigs_value"){
- up <- up + geom_hline(yintercept = 1.0, linetype = "solid", color = "gray")
- }
- up <- up + geom_boxplot()
- return(up)
- }
- uPlotlist_adni <- list()
- uPlotlist_a4 <- list()
- for (u in utils) {
- uPlotlist_adni[[u]] <- get_util_plot(util_df_adni, u)
- uPlotlist_a4[[u]] <- get_util_plot(util_df_a4, u)
- }
- util_grid_adni <- ggarrange(plotlist = uPlotlist_adni, ncol = 2, nrow = 3, common.legend = TRUE, legend = "right")
- plot(util_grid_adni)
- util_grid_a4 <- ggarrange(plotlist = uPlotlist_a4, ncol = 2, nrow = 3, common.legend = TRUE, legend = "right")
- plot(util_grid_a4)
- ggsave("~/R/DDLS-plots/util_grid_adni.tiff", util_grid_adni, width = 10, height = 10, units = "in", dpi = 500)
- ggsave("~/R/DDLS-plots/util_grid_a4.tiff", util_grid_a4, width = 10, height = 10, units = "in", dpi = 500)
- ##### Get specific values #####
- summary_stats_adni <- up_df_adni %>%
- group_by(Method) %>%
- dplyr::summarize(
- mean_u = mean(util_score),
- mean_p = mean(priv_score),
- sd_u = sd(util_score),
- sd_p = sd(priv_score),
- num = n(),
- ci_margin_u = qt(0.975, df = n() - 1) * sd(util_score) / sqrt(n()),
- ci_margin_p = qt(0.975, df = n() - 1) * sd(priv_score) / sqrt(n()),
- ci_lwr_u = mean_u - ci_margin_u,
- ci_upr_u = mean_u + ci_margin_u,
- ci_lwr_p = mean_p - ci_margin_p,
- ci_upr_p = mean_p + ci_margin_p
- )
- summary_stats_a4 <- up_df_a4 %>%
- group_by(Method) %>%
- dplyr::summarize(
- mean_u = mean(util_score),
- mean_p = mean(priv_score),
- ci_margin_u = qt(0.975, df = n() - 1) * sd(util_score) / sqrt(n()),
- ci_margin_p = qt(0.975, df = n() - 1) * sd(priv_score) / sqrt(n()),
- ci_lwr_u = mean_u - ci_margin_u,
- ci_upr_u = mean_u + ci_margin_u,
- ci_lwr_p = mean_p - ci_margin_p,
- ci_upr_p = mean_p + ci_margin_p
- )
- priv_df_adni %>% group_by(dataset) %>%
- dplyr::summarise(Mean = mean(eps_identif_risk_value),
- SD = sd(eps_identif_risk_value),
- N = n(),
- margin = qt(0.975, df = n() - 1) * sd(eps_identif_risk_value) / sqrt(n()),
- lower = Mean - margin,
- upper = Mean + margin) %>% filter(upper > 0.09)
- priv_df_a4 %>% group_by(dataset) %>%
- dplyr::summarise(Mean = mean(eps_identif_risk_value),
- SD = sd(eps_identif_risk_value),
- N = n(),
- margin = qt(0.975, df = n() - 1) * sd(eps_identif_risk_value) / sqrt(n()),
- lower = Mean - margin,
- upper = Mean + margin) %>% filter(upper > 0.09)
- priv_df_adni %>% group_by(dataset) %>%
- dplyr::summarise(Mean = mean(att_discl_risk_value),
- SD = sd(att_discl_risk_value),
- N = n(),
- margin = qt(0.975, df = n() - 1) * sd(att_discl_risk_value) / sqrt(n()),
- lower = Mean - margin,
- upper = Mean + margin) %>% filter(upper > 0.1)
- priv_df_a4 %>% group_by(dataset) %>%
- dplyr::summarise(Mean = mean(att_discl_risk_value),
- SD = sd(att_discl_risk_value),
- N = n(),
- margin = qt(0.975, df = n() - 1) * sd(att_discl_risk_value) / sqrt(n()),
- lower = Mean - margin,
- upper = Mean + margin) %>% filter(upper > 0.1)
- priv_df_adni %>% group_by(dataset) %>%
- dplyr::summarise(Mean = mean(mia_recall_value),
- SD = sd(mia_recall_value),
- N = n(),
- margin = qt(0.975, df = n() - 1) * sd(mia_recall_value) / sqrt(n()),
- lower = Mean - margin,
- upper = Mean + margin) %>% filter(upper > 0.1)
- priv_df_a4 %>% group_by(dataset) %>%
- dplyr::summarise(Mean = mean(mia_recall_value),
- SD = sd(mia_recall_value),
- N = n(),
- margin = qt(0.975, df = n() - 1) * sd(mia_recall_value) / sqrt(n()),
- lower = Mean - margin,
- upper = Mean + margin) %>% filter(upper > 0.1)
- # Bonus experiment
- #### ADNI+ ####
- epsilons <- c(100, NA)
- samples <- c(100, 18)
- file_paths <- paste0("~/Python/WASP-DDLS/SE-benchmark/adni_plus/bmk_new_deg2_eps", ifelse(is.na(epsilons), "zero", epsilons), ".csv")
- # Read CSVs in a loop
- res_list <- list()
- for (i in seq_along(epsilons)) {
- df <- read.csv(file_paths[i])
- df$Epsilon <- epsilons[i]
- df$samples <- samples[i]
- res_list[[i]] <- df
- }
- # Combine all data frames
- bmk_ds <- bind_rows(res_list)
- util_cols <- c("mutual_inf_diff_value", "ks_tvd_stat_value",
- "frac_ks_sigs_value","avg_F1_diff_value", "avg_F1_diff_hout_value",
- "nnaa_value")
- priv_cols <- c("priv_loss_nndr_value", "priv_loss_nnaa_value","hit_rate_value",
- "avg_nndr_value", "eps_identif_risk_value", "priv_loss_eps_value",
- "mia_recall_value", "att_discl_risk_value")
- cols <- c(util_cols, priv_cols)
- bmk_ds$Epsilon <- bmk_ds %>%
- select(Epsilon) %>%
- mutate_all(~replace(., is.na(.), 0)) %>%
- mutate(Epsilon = factor(Epsilon, levels = as.character(unique(Epsilon)))) %>%
- pull(Epsilon)
- # CTGAN
- epochs <- c(750)
- setting <- c("default")
- file_paths <- paste0("~/Python/WASP-DDLS/SE-benchmark/adni_plus/bmk_new_ctgan_", setting, "_epochs_", epochs, ".csv")
- #file_paths <- c(file_paths, "~/Python/WASP-DDLS/SE-benchmark/bmk_ctgan_epochs_100.csv")
- # Read CSVs in a loop
- res_list <- list()
- for (i in seq_along(file_paths)) {
- df <- read.csv(file_paths[i])
- df$Epochs <- epochs[i]
- df$samples <- 100
- res_list[[i]] <- df
- }
- # Combine all data frames
- bmk_ctgan <- bind_rows(res_list)
- bmk_ctgan$Epochs <- as.factor(bmk_ctgan$Epochs)
- # Synthpop
- bmk_synthpop <- read.csv("~/Python/WASP-DDLS/SE-benchmark/adni_plus/bmk_new_synthpop.csv") %>% mutate(
- Epochs = 0,
- samples = 100
- )
- # TabPFN
- bmk_tabpfn <- read.csv("~/Python/WASP-DDLS/SE-benchmark/adni_plus/bmk_new_tabpfn_t_1.0.csv")
- label_list = c("DS (100)", "DS w/o DP", "CTGAN (default)", "Synthpop", "TabPFN (t=1.0)")
- util_df_adni_plus <- rbind(select(bmk_ds, dataset, model, all_of(util_cols)),
- select(bmk_ctgan, dataset, model, all_of(util_cols)),
- select(bmk_synthpop, dataset, model, all_of(util_cols)),
- select(bmk_tabpfn, dataset, model, all_of(util_cols))
- ) |>
- dplyr::mutate(avg_F1_diff_value = abs(avg_F1_diff_value),
- avg_F1_diff_hout_value = abs(avg_F1_diff_hout_value)) |>
- dplyr::mutate(mutual_inf_diff = 1 - tanh(mutual_inf_diff_value),
- ks_tvd_stat = 1 - ks_tvd_stat_value,
- frac_ks_sigs = 1 - frac_ks_sigs_value,
- avg_F1_diff = 1 - abs(avg_F1_diff_value),
- avg_F1_diff_hout = 1 - abs(avg_F1_diff_hout_value),
- nnaa = 1 - nnaa_value)
- util_df_adni_plus$util_score <- util_df_adni_plus |> dplyr::select(c(mutual_inf_diff, ks_tvd_stat, frac_ks_sigs, avg_F1_diff, avg_F1_diff_hout, nnaa)) |> rowMeans()
- util_df_adni_plus$Method <- factor(util_df_adni_plus$dataset, levels = unique(util_df_adni_plus$dataset),
- labels=label_list)
- priv_df_adni_plus <- rbind(select(bmk_ds, dataset, model, all_of(priv_cols)),
- select(bmk_ctgan, dataset, model, all_of(priv_cols)),
- select(bmk_synthpop, dataset, model, all_of(priv_cols)),
- select(bmk_tabpfn, dataset, model, all_of(priv_cols))
- ) |>
- dplyr::mutate(priv_loss_nndr = 1 - abs(priv_loss_nndr_value),
- priv_loss_nnaa = 1 - abs(priv_loss_nnaa_value),
- priv_loss_eps = 1 - abs(priv_loss_eps_value),
- hit_rate = 1 - hit_rate_value,
- eps_identif_risk = 1 - eps_identif_risk_value,
- mia_recall = 1 - mia_recall_value,
- att_discl_risk = 1 - att_discl_risk_value)
- priv_df_adni_plus$priv_score <- priv_df_adni_plus |> dplyr::select(c(priv_loss_nndr, priv_loss_nnaa, priv_loss_eps, hit_rate, eps_identif_risk, att_discl_risk)) |> rowMeans()
- priv_df_adni_plus$Method <- factor(priv_df_adni_plus$dataset, levels = unique(priv_df_adni_plus$dataset),
- labels=label_list)
- up_df_adni_plus <- util_df_adni_plus |> dplyr::select(c(Method, model, util_score)) |>
- dplyr::inner_join(priv_df_adni_plus |> dplyr::select(c(Method, model, priv_score)), by = c("Method", "model"))
- colormap <- c(
- paletteer_d("rcartocolor::BluYl")[1:2],
- paletteer_d("beyonce::X58")[3],
- "#663399",
- paletteer_d("ggsci::cyan_material")[c(1,3,5,7)]
- )
- up_plot_adni_plus <- ggplot(data = up_df_adni_plus, aes(x=util_score, y=priv_score, fill=Method)) +
- labs(title = "ADNI+", x = "Utility", y = "Privacy") +
- #scale_fill_paletteer_d("rcartocolor::BluYl") +
- scale_fill_manual(values = colormap) +
- theme_minimal()
- #ylim(0.7,1.0) + xlim(0.3,0.85)
- up_df_adni_ <- up_df_adni %>% filter(Method %in% up_df_adni_plus$Method)
- up_plot_adni_plus <- up_plot_adni_plus +
- geom_point(pch=21, color="gray", size = 3, data=up_df_adni_, alpha=0.75) +
- geom_point(pch=21, color = "black", size=3)
- plot(up_plot_adni_plus)
- up_plot_adni_plus <- up_plot_adni_plus + theme(plot.margin = margin(5.5, 125, 5.5, 125))
- up_plot_all <- ggarrange(up_plot_adni, up_plot_a4, ncol=2, common.legend = TRUE, legend = "right")
- up_plot_all <- ggarrange(up_plot_all, up_plot_adni_plus, nrow=2, common.legend = FALSE)
- plot(up_plot_all)
- ##### Saving and stuff ####
- ggsave("~/R/DDLS-plots/up_plot_all.tiff", up_plot_all, width = 10, height = 9, units = "in", dpi = 500)
- summary_stats_adni_plus <- up_df_adni_plus %>%
- group_by(Method) %>%
- dplyr::summarize(
- mean_u = mean(util_score),
- mean_p = mean(priv_score),
- sd_u = sd(util_score),
- sd_p = sd(priv_score),
- num = n(),
- ci_margin_u = qt(0.975, df = n() - 1) * sd(util_score) / sqrt(n()),
- ci_margin_p = qt(0.975, df = n() - 1) * sd(priv_score) / sqrt(n()),
- ci_lwr_u = mean_u - ci_margin_u,
- ci_upr_u = mean_u + ci_margin_u,
- ci_lwr_p = mean_p - ci_margin_p,
- ci_upr_p = mean_p + ci_margin_p
- )
- res <- summary_stats_adni %>% inner_join(summary_stats_adni_plus, by='Method', suffix = c('.adni', '.adni_plus')) %>%
- mutate(ci.bound_u = (mean_u.adni - mean_u.adni_plus) - 1.96 * sqrt((sd_u.adni^2/num.adni) + (sd_u.adni^2/num.adni)),
- ci.bound_p = (mean_p.adni - mean_p.adni_plus) - 1.96 * sqrt((sd_p.adni^2/num.adni) + (sd_p.adni^2/num.adni)))
- res <- data.frame()
- for(method in unique(up_df_adni_plus$Method)) {
- a <- up_df_adni_plus %>% filter(Method == method)
- b <- up_df_adni %>% filter(Method == method)
- t_u <- t.test(a$util_score, b$util_score, alternative = "two.sided", var.equal=F)
- t_p <- t.test(a$priv_score, b$priv_score, alternative = "two.sided", var.equal=F)
- res <- rbind(res, data.frame(Method = method,
- #t_stat_u = t_u$statistic,
- p_value_u = t_u$p.value * nrow(a),
- mean_u_x = t_u$estimate[1],
- mean_u_y = t_u$estimate[2],
- #t_stat_p = t_p$statistic,
- p_value_p = t_p$p.value * nrow(a),
- mean_p_x = t_p$estimate[1],
- mean_p_y = t_p$estimate[2]
- ))
- }
benchmark.plots.R at commit 299d5c6, under MIT · at the source
Overview
- Centre for Mathematical Sciences, Lund University, Lund, Sweden
- Clinical Memory Research Unit, Department of Clinical Sciences in Malmö, Lund University, Lund, Sweden
- Department of Clinical Sciences Malmö, SciLifeLab, Lund University, Lund, Sweden
- Wallenberg Center for Molecular Medicine, Lund University, Lund, Sweden
- Memory Clinic, Skåne University Hospital, Malmö, Sweden
Abstract
INTRODUCTION: The scarcity of large, clinically relevant cohorts is becoming a bottleneck in Alzheimer's disease (AD) research, as their sensitive nature makes open data sharing difficult. Privacy‐preserving synthetic datasets generated with machine learning may help address this challenge.
METHODS: We compared five frameworks for generating synthetic tabular data from the Alzheimer's Disease Neuroimaging Initiative and Anti‐Amyloid Treatment in Asymptomatic Alzheimer's Disease cohorts, with a set of empirical privacy and utility metrics. Two of the methods, DataSynthesizer and TableDiffusion, provide ε‐differential privacy guarantees.
RESULTS: Methods with differential privacy achieved high privacy ratings but low levels of utility. Deep learning methods like Tabular Prior‐data Fitted Network (TabPFN) and Conditional Generative Adversarial Network (CTGAN) also showed high privacy with limited utility. In contrast, non‐private DataSynthesizer and Synthpop offered higher utility at a cost of lower privacy.
DISCUSSION: The evaluated methods demonstrated a clear trade‐off between privacy and utility. High privacy was generally associated with insufficient utility, highlighting the need for further research into synthetic data generation for AD.
Reproduced under the paper's license (CC BY), from the paper cited above.
Repository
Its files are read in the Code ↔ Paper reader above, with 7 matches between paragraphs and lines of code.
fwinzell/synthetic_ad
299d5c63736fcf624ab4aa5a67f43723c116be7d, 12 February 2026Availability: 1 check, the latest on 27 September 2026: the link answers
- 27 September 2026: the link answers
32 files
- R/
a4_dataset.R — R, 111 lines - R/
benchmark.plots.R — R, 717 lines, 1 match - R/
bmk_ctgan.R — R, 78 lines, 1 match - R/
bmk_degrees.R — R, 222 lines, 1 match - R/
bmk_ds_vs_sp.R — R, 87 lines - R/
compute_cis.R — R, 182 lines - R/
correlation_biomarkers.R — R, 38 lines - R/
create_and_save_datasets — R, 110 lines.R - R/
get_larger_adni.R — R, 99 lines - R/
ml_plots.R — R, 183 lines - R/
ml_table.R — R, 152 lines - R/
plot.results.R — R, 180 lines - R/
plot_results_new.R — R, 293 lines - R/
synthpop.R — R, 66 lines - R/
tables_for_paper.R — R, 109 lines - python/
bayesian_synthesizing.py — Python, 185 lines, 1 match - python/
correlations_new.py — Python, 126 lines - python/
create_synthetic_data_ta — Python, 110 linesble.py - python/
display_distributions.py — Python, 32 lines - python/
eval_benchmark.py — Python, 400 lines, 1 match - python/
graph.py — Python, 273 lines - python/
main_ctgan.py — Python, 356 lines, 1 match - python/
main_ds.py — Python, 283 lines - python/
main_ml.py — Python, 777 lines - python/
mia_test.py — Python, 278 lines - python/
plot_bn.py — Python, 64 lines - python/
tabpfn_generate.py — Python, 215 lines - python/
train_hgb.py — Python, 161 lines - python/
train_svm.py — Python, 452 lines, 1 match - python/
utils.py — Python, 204 lines - LICENSE — License, 21 lines
- README.md — Text, 5 lines
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Version 1, 27 September 2026: the first record
Recorded: type, language, journal, volume, issue, pages, dates, 10 authors, 4 keywords, 2 funders, 26 references.
Cite
This paper
Winzell, F., Arvidsson, I., Overgaard, N. C., Heyden, A., Åström, K., Karlsson, L., Vogel, J. W., Hansson, O., Mattsson‐Carlgren, N., & for the Alzheimer's Disease Neuroimaging Initiative. (2026). Benchmarking privacy and utility in synthetic tabular cohorts for Alzheimer's disease research. Alzheimer's & dementia (Amsterdam, Netherlands), 18(3), e70430. https://
BibTeX
@article{winzell2026benc
author = {Winzell, Filip and Arvidsson, Ida and Overgaard, Niels Christian and Heyden, Anders and Åström, Kalle and Karlsson, Linda and Vogel, Jacob W and Hansson, Oskar and Mattsson‐Carlgren, Niklas and {for the Alzheimer's Disease Neuroimaging Initiative}},
title = {{Benchmarking privacy and utility in synthetic tabular cohorts for Alzheimer's disease research}},
journal = {Alzheimer's \& dementia (Amsterdam, Netherlands)},
year = {2026},
month = jul,
volume = {18},
number = {3},
pages = {e70430},
publisher = {Wiley},
issn = {2352-8729},
doi = {10.1002/
url = {https://
pmid = {42582267},
pmcid = {PMC13457355}
}
RIS
TY - JOUR
AU - Winzell, Filip
AU - Arvidsson, Ida
AU - Overgaard, Niels Christian
AU - Heyden, Anders
AU - Åström, Kalle
AU - Karlsson, Linda
AU - Vogel, Jacob W
AU - Hansson, Oskar
AU - Mattsson‐Carlgren, Niklas
AU - for the Alzheimer's Disease Neuroimaging Initiative
TI - Benchmarking privacy and utility in synthetic tabular cohorts for Alzheimer's disease research
T2 - Alzheimer's & dementia (Amsterdam, Netherlands)
J2 - Alzheimers Dement (Amst)
PY - 2026
DA - 2026/
VL - 18
IS - 3
SP - e70430
SN - 2352-8729
PB - Wiley
DO - 10.1002/
UR - https://
LA - en
ER -
CSL-JSON
{
"id": "10.1002/
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"title": "Benchmarking privacy and utility in synthetic tabular cohorts for Alzheimer's disease research",
"container-title": "Alzheimer's & dementia (Amsterdam, Netherlands)",
"author": [
{
"family": "Winzell",
"given": "Filip"
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{
"family": "Arvidsson",
"given": "Ida"
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{
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"given": "Niels Christian"
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{
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{
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"given": "Oskar"
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{
"family": "Mattsson‐Carlgren",
"given": "Niklas"
},
{
"literal": "for the Alzheimer's Disease Neuroimaging Initiative"
}
],
"container-title-short":
"volume": "18",
"issue": "3",
"page": "e70430",
"DOI": "10.1002/
"PMID": "42582267",
"PMCID": "PMC13457355",
"ISSN": "2352-8729",
"publisher": "Wiley",
"URL": "https://
"language": "en",
"issued": {
"date-parts": [
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}
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