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D53: landmark on baseline covariates (month-5 version as landmark_m5), NCO-1 depends on PVI-free severity, physician-cluster bootstrap script

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Co-Authored-By: Claude Opus 5.5 <[email protected]>
This commit is contained in:
chendun1995
2026-10-28 07:20:32 -04:00
co-authored by Claude Opus 5.5
parent fbc417662c
commit 5304c89316
10 changed files with 86 additions and 18 deletions
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pvisim/R/estimators.R
+9 -4
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@@ -197,6 +197,9 @@ run_designs <- function(rec, designs, variant, outcomes = c(male = "t_male", dis
cbind(contrast = "early_none", est_naive(rec, outcomes[[o]], variant), outcome = o))),
landmark = rbindlist(lapply(names(outcomes), function(o)
cbind(contrast = "early_none", est_landmark(rec, outcomes[[o]], variant, extra_covs = rec$extra_covs), outcome = o))),
landmark_m5 = rbindlist(lapply(names(outcomes), function(o)
cbind(contrast = "early_none", est_landmark(rec, outcomes[[o]], variant, extra_covs = rec$extra_covs,
at_landmark = TRUE), outcome = o))),
ccw = est_ccw(rec, outcomes, variant, rs = copy(rs), phat = phat, comparators = cmp),
seq = cbind(contrast = "now_not", est_seq(rec, outcomes, variant, rs = copy(rs), phat = phat)))
r[, `:=`(design = design, variant = variant, n = nrow(rec$patients))]
@@ -239,9 +242,11 @@ fit_pvi_ps <- function(p, variant, covs = c(BASE_COVS, "sev_obs", "sev0")) {
}
#' Landmark at month W (D13): patients alive and MALE-free at the start of month W;
#' exposure = PVI in months 0..W-1; covariates at diagnosis and at month W-1;
#' outcome counted in months W..horizon-1.
est_landmark <- function(rec, outcome = "t_male", variant = "V1_ignore", horizon = 60L, extra_covs = NULL) {
#' exposure = PVI in months 0..W-1; covariates at diagnosis; outcome counted in months
#' W..horizon-1. With at_landmark = TRUE the propensity score also uses severity at month
#' W-1, which a PVI has already changed (supplement, D53).
est_landmark <- function(rec, outcome = "t_male", variant = "V1_ignore", horizon = 60L, extra_covs = NULL,
at_landmark = FALSE) {
W <- rec$par$size$window
p <- copy(rec$patients)[(is.na(t_death) | t_death >= W) & (is.na(t_male) | t_male >= W)]
p[, `:=`(t_out = get(outcome), arm = ifelse(!is.na(t_pvi) & t_pvi < W, "early", "none"))]
@@ -249,7 +254,7 @@ est_landmark <- function(rec, outcome = "t_male", variant = "V1_ignore", horizon
p <- merge(p, rec$pm[t == W - 1L, .(id, sev_obs)], by = "id")
p <- merge(p, rec$pm[t == 0, .(id, sev0 = sev_obs)], by = "id")
p[, pvi := as.integer(arm == "early")]
ps <- fit_pvi_ps(p, variant, covs = c(BASE_COVS, "sev_obs", "sev0", extra_covs))
ps <- fit_pvi_ps(p, variant, covs = c(BASE_COVS, "sev0", if (at_landmark) "sev_obs", extra_covs))
p[, w := ifelse(arm == "early", 1 / ps, 1 / (1 - ps))]
d <- expand_followup(p[!is.na(w)], W, horizon)
rd_from_aj(aj_cif(d, horizon), "early", "none")
pvisim/R/limits.R
+3 -2
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@@ -17,13 +17,14 @@ oracle_records <- function(rec) {
o
}
#' Oracle versions of the landmark and naive designs (V1, patient-level SE).
#' Oracle versions of the landmark (both versions) and naive designs (V1, patient-level SE).
run_oracle <- function(rec, outcomes = c(male = "t_male", disease = "t_disease", nco1 = "t_nco1", nco2 = "t_nco2")) {
o <- oracle_records(rec)
rbindlist(lapply(names(outcomes), function(nm) {
lm <- est_landmark(o, outcomes[[nm]], "V1_ignore", extra_covs = o$extra_covs)
l5 <- est_landmark(o, outcomes[[nm]], "V1_ignore", extra_covs = o$extra_covs, at_landmark = TRUE)
nv <- est_naive(o, outcomes[[nm]], "V1_ignore", extra_covs = o$extra_covs)
rbind(cbind(design = "landmark", lm), cbind(design = "naive", nv))[
rbind(cbind(design = "landmark", lm), cbind(design = "landmark_m5", l5), cbind(design = "naive", nv))[
, `:=`(outcome = nm, contrast = "early_none", variant = "oracle", se = se_patient)]
}))
}
pvisim/R/records.R
+21
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@@ -68,3 +68,24 @@ replicate_seed <- function(world, scenario, rep) {
h <- sum(utf8ToInt(key) * seq_along(utf8ToInt(key))^2)
as.integer((h * 2654435761) %% 2147483647)
}
#' Physician-cluster bootstrap resample of a replicate's records (D28): physicians are
#' drawn with replacement and each draw brings all of its patients, with new patient and
#' physician ids so repeated physicians count as separate clusters.
bootstrap_records <- function(rec, seed) {
set.seed(seed)
phys <- unique(rec$patients$phys_id)
draw <- data.table(phys_id = sample(phys, length(phys), replace = TRUE), new_phys = seq_along(phys))
map <- rec$patients[, .(id, phys_id)][draw, on = "phys_id", allow.cartesian = TRUE]
map[, new_id := seq_len(.N)]
remap <- function(x) {
x <- x[map[, .(id, new_id)], on = "id", allow.cartesian = TRUE]
x[, id := new_id][, new_id := NULL][]
}
out <- rec
out$patients <- remap(rec$patients)[map[, .(new_id, new_phys)], on = c(id = "new_id"), phys_id := i.new_phys]
out$pm <- setkey(remap(rec$pm), id, t)
out$hidden <- remap(rec$hidden)
out$hidden_pm <- remap(rec$hidden_pm)
out
}
pvisim/R/simulate.R
+8 -3
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@@ -127,12 +127,14 @@ simulate_course <- function(pop, par, pol = policy("natural"), seed = 1L, record
lp_rr0 <- rr$intercept + rr$skill * pat$skill + rr$style * pat$style
lp_nco1 <- nc$nco1$intercept + nc$nco1$frailty * pat$frailty + nc$nco1$smoking * pat$smoking_true +
nc$nco1$age10 * a10
nco1_z <- if (is.null(nc$nco1$z)) 0 else nc$nco1$z
lp_nco2 <- nc$nco2$intercept + nc$nco2$style * pat$style + nc$nco2$venous * pat$venous
lp_nce <- nc$nce$intercept + nc$nce$style * pat$style + nc$nce$frailty * pat$frailty
kappa_post <- ef$kappa * exp(-ef$skill_kappa * pat$skill)
# state
Z <- pat$z0
Zn <- pat$z0 # severity on the natural course without any PVI (relief or kappa): drives NCO-1 (D53)
alive <- rep(TRUE, N); treated <- rep(FALSE, N); clti_true <- rep(FALSE, N)
clti_code <- rep(FALSE, N); male <- rep(FALSE, N)
t_pvi <- t_clti_true <- t_clti_code <- t_amp <- t_bypass <- t_rr <- t_male <- t_death <-
@@ -147,8 +149,11 @@ simulate_course <- function(pop, par, pol = policy("natural"), seed = 1L, record
for (t in 0:(M - 1)) {
U <- matrix(runif(N * ns), N, ns, dimnames = list(NULL, STREAMS))
a <- alive
if (t > 0) Z[a] <- Z[a] + pat$rate[a] + kappa_post[a] * treated[a] +
par$severity$eps_sd * qnorm(U[a, "eps"])
if (t > 0) {
eps <- par$severity$eps_sd * qnorm(U[a, "eps"])
Z[a] <- Z[a] + pat$rate[a] + kappa_post[a] * treated[a] + eps
Zn[a] <- Zn[a] + pat$rate[a] + eps
}
if (record) {
zmat[a, t + 1] <- Z[a]
cmat[a, t + 1] <- qpois(U[a, "proxy"], exp(par$measurement$proxy_intercept + par$measurement$proxy_z * Z[a]))
@@ -183,7 +188,7 @@ simulate_course <- function(pop, par, pol = policy("natural"), seed = 1L, record
}
# negative controls (never depend on PVI)
x <- a & is.na(t_nco1) & U[, "nco1"] < plogis(lp_nco1); t_nco1[x] <- t
x <- a & is.na(t_nco1) & U[, "nco1"] < plogis(lp_nco1 + nco1_z * Zn); t_nco1[x] <- t
x <- a & is.na(t_nco2) & U[, "nco2"] < plogis(lp_nco2); t_nco2[x] <- t
if (t < W) { x <- a & is.na(t_nce) & U[, "nce"] < plogis(lp_nce); t_nce[x] <- t }
pvisim/inst/params/dgp_default.yml
+1 -1
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@@ -78,7 +78,7 @@ outcomes:
clti_revasc: {intercept: -4.5} # PVI after CLTI (not elective); most CLTI patients get bypass, tibial work, amputation or nothing
negative_controls: # never depend on PVI
nco1: {intercept: -6.4, frailty: 0.5, smoking: 0.4, age10: 0.3} # hip fracture / pneumonia
nco1: {intercept: -6.75, frailty: 0.5, smoking: 0.4, age10: 0.3, z: 0.3} # hip fracture / pneumonia; z = PVI-free severity (D53)
nco2: {intercept: -7.1, style: 0.8, venous: 0.5} # varicose-vein ablation
nce: {intercept: -5.7, style: 0.8, frailty: -0.2} # low-value procedure, months 0-5