Table 1.

Averages of parameter estimates (Ave), empirical standard error of estimates (SE), the averages of the standard error estimates from naive (${\widehat{\text{SE}}}^n$) and adjusted (${\widehat{\text{SE}}}^a$) estimators, their corresponding coverage probabilities (CPⁿ and CP^a) using the “IPW” approach, average and empirical standard error using the “LB” approach (Ave_LB and SE_LB) based on NCC samplings with cohort size of N = 1000 and m = 1 or 3 controls. Relative efficiencies of both approaches (RE_ipw and RE_LB) are relative to the cohort. Accuracy summaries of marker Y are evaluated at t = 1 and c₁ = F_Y⁻¹(0.25), c₂ = F_Y⁻¹(0.75), respectively. Censoring times are independent of Y