Table 1.

Number of studies with a value of each property in our dataset, and in the original data files of the Cochrane risk of bias tool

		Our dataset		Original data source
Property	Property value	Number	Proportion	Number	Proportion
blind	low	361	0.538	7120	0.415
	not-low	310	0.462	10 021	0.585
	total	671		17 141
seq-gen	low	495	0.501	6846	0.408
	not-low	494	0.500	9942	0.592
	total	989		16 788
alloc-conc	low	327	0.457	6057	0.338
	not-low	388	0.543	11 840	0.662
	total	715		17 897