| Number of articles n (%) |
---|---|
Sample size estimation reported | |
 Yes | 9 (12) |
 Not reported | 67 (88) |
Reporting of follow-up time | |
 Median time | 28 (37) |
 Person time | 26 (34) |
 Not reported | 22 (29) |
Survival curves | |
 Kaplan-Meier | 51 (67) |
 Nelson-Aalen | 14 (18) |
 Not reported | 11 (15) |
Comparison of survival curves | |
 Log-rank test | 44 (58) |
 Weighted log-rank test (Wilcoxon-Breslow-Gehan) | 1 (1.3) |
 Not reported | 31 (41) |
Survival Regression models (N = 74) | |
 Cox proportional hazard | 67 (91) |
 Competing risk analysis | 3 (4.1) |
 Parametric proportional hazard | 2 (2.7) |
 Parametric accelerated failure time | 2 (2.7) |
Reported regression models assumptions testeda | |
 Cox PH (N = 67) |  |
 Visual (graphical log-log plots) | 11 (16) |
 Schoenfeld residuals test | 21 (31) |
 Not reported | 35 (52) |
Competing risk analysis (N = 3) | |
 Schofield residuals test | 1 (33) |
 Not reported | 2 (67) |
 Parametric Methods (N = 4) |  |
 Information theory (LL, AIC, BIC) | 4 (100) |