Table 2 Open in new tab A priori sample...

	Alpha
80%	108 controls 54 cases	148 controls 74 cases	190 controls 96 cases	284 controls 142 cases
85%	128 controls 64 cases	172 controls 86 cases	216 controls 108 cases	314 controls 158 cases
90%	156 controls 78 cases	204 controls 102 cases	250 controls 125 cases	358 controls 180 cases
95%	200 controls 100 cases	256 controls 128 cases	308 controls 154 cases	424 controls 212 cases

	Alpha
80%	108 controls 54 cases	148 controls 74 cases	190 controls 96 cases	284 controls 142 cases
85%	128 controls 64 cases	172 controls 86 cases	216 controls 108 cases	314 controls 158 cases
90%	156 controls 78 cases	204 controls 102 cases	250 controls 125 cases	358 controls 180 cases
95%	200 controls 100 cases	256 controls 128 cases	308 controls 154 cases	424 controls 212 cases

Table 2

A priori sample size estimate scenarios for the primary objective of evaluating the discriminating power of ulnar flexural rigidity based on the assumptions that the AUC of ulnar flexural rigidity is >0.7 with the null hypothesis value of 0.6, and a ratio of 2:1 for controls and cases.

	Alpha
Power	0.2	0.1	0.05	0.01
80%	108 controls 54 cases	148 controls 74 cases	190 controls 96 cases	284 controls 142 cases
85%	128 controls 64 cases	172 controls 86 cases	216 controls 108 cases	314 controls 158 cases
90%	156 controls 78 cases	204 controls 102 cases	250 controls 125 cases	358 controls 180 cases
95%	200 controls 100 cases	256 controls 128 cases	308 controls 154 cases	424 controls 212 cases

	Alpha
Power	0.2	0.1	0.05	0.01
80%	108 controls 54 cases	148 controls 74 cases	190 controls 96 cases	284 controls 142 cases
85%	128 controls 64 cases	172 controls 86 cases	216 controls 108 cases	314 controls 158 cases
90%	156 controls 78 cases	204 controls 102 cases	250 controls 125 cases	358 controls 180 cases
95%	200 controls 100 cases	256 controls 128 cases	308 controls 154 cases	424 controls 212 cases

Abbreviation: AUC, area under the curve.

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