Skip to main content

Table 3 Reporting of follow-up time, plotting of survival curves and survival regression analyses

From: A systematic review of the quality of conduct and reporting of survival analyses of tuberculosis outcomes in Africa

 

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)

  1. aThese are reported methods used to test the underlying assumptions in the statistical methods section and not the actual number of studies that reported the test results, PH-Proportional Hazard, LL-likelihood values, AIC-Akaike Information Criteria, BIC-Bayesian Information Criteria