Table 1.

Institutional training splits with varying degrees of sample size standard deviation across the 4 institutions. The number of positive (+) and negative (−) samples at each institution are also indicated (each split is balanced)

Split	Inst 1 +/−	Inst 2 +/−	Inst 3 +/−	Inst 4 +/−	Sample size Std. Dev.
1	800/800	800/800	800/800	800/800	0.0
2	960/960	853/853	747/747	640/640	238.4
3	1120/1120	907/907	693/693	480/480	477.2
4	1280/1280	960/960	640/640	320/320	715.5
5	1440/1440	1013/1013	587/587	160/160	953.9