Table 2.

Method reporting in the included studies

	Included studies
	n = 318	%
Assessment of proportional hazards (PH)
Yes	127	40
No	191	60
PH testing method used
Log(−log)	59	46
Schoenfeld residuals	42	33
Log of time	15	12
Graphical evaluation of KM curve	10	8
Score process test	1	1
Result of the PH testing state	51	40
PH violation stated	46	36
PH violation addressed in analysis	41	89
Time axis division	30	73
Time dependent coefficients	7	17
stratified analysis	4	10