Table 1. Number of observations and power for analysis for the critical value of 0.2 of Pearson correlation.

	Healthy eyes		Glaucomatous eyes
	Subjects (eyes)	Power	Subjects (eyes)	Power
DIGS/ADAGES
RA vs SAP MS and MD	694 (1212)	1.00	271 (362)	0.91
RA vs SWAP MS and MD	472 (802)	0.99	247 (328)	0.89
RA vs FDP MS	685 (1207)	1.00	266 (356)	0.91
RNFLT vs SAP MS and MD	204 (336)	0.82	180 (238)	0.77
RNFLT vs FDP MS	181 (295)	0.77	151 (200)	0.70
IOWA
RNFLT vs SAP MD	76 (76)	0.41
SUNY-IU
RNFLT vs SAP, CSP, FDP MS	62 (62)	0.35	51 (51)	0.29