Table 1.

Summary of reported data scenarios from McCormick Matthews [24]

Scenario	Reported Data	Number	Required Method
1	i) P value/chi-square statistic for ln (HR) or HR ii) Total number of events	6 (17%)	Equations 8 and 10, Parmar [8]
2	i) IPD	0 (0%)	Available statistical methods
3	i) KM survival plot ii) Number at risk included at regular intervals	4 (11%)	Estimation from the KM plots, Guyot [16]
4a	i) KM survival plot ii) No total number of events iii) No number at risk included iv) P-value/chi-square statistic for ln (HR) or HR (exact)	19 (53%)	Estimations from the KM plots, Parmar [8]
4b	v) P-value/chi-square statistic for ln (HR) or HR (non-exact)	4 (11%)
5	i) KM survival plot ii) No total number of events iii) No number at risk included iv) No p value	3 (8%)	Estimations from the KM plots, Parmar [8]
	Total	36 (100%)

The frequency of reported data scenarios from a meta-analysis published by McCormick Matthews et al. [24] in which studies did not explicitly state both the ln (HR) and var. ln (HR). The required equations to extract ln (HR) and var. ln (HR) given that set of data is also given