Adjusted Nelson–Aalen Estimates With Retrospective Matching
回顾性匹配下调整后的 Nelson–Aalen 估计
In certain situations, randomized trials are not possible, but formal comparison of survival in two or more groups is still desirable. Although no substitute for randomization, application of the matched case-control design to survival studies may minimize the potential bias. Comparable estimates for each treatment group can be obtained by matching or stratifying according to prognostic variables, and weighting each individual to make stratum distributions the same over the…