Table 1 Methods used to assess the PH assumption
From: Combined test versus logrank/Cox test in 50 randomised trials
Method of checking non-PH | No. of studies |
|---|---|
Treatment × time interaction (likelihood ratio test) | 7 |
Schoenfeld residuals (graphical assessment) | 4 |
Schoenfeld residuals (Grambsch–Therneau test) | 1 |
Method not reported | 2 |
No check done | 36 |
Total | 50 |