. Author manuscript; available in PMC: 2009 Oct 7.

Published in final edited form as: Ophthalmology. 2007 Oct 26;115(6):927–933. doi: 10.1016/j.ophtha.2007.08.010

Table 1.

Baseline variability in repeated intraocular pressure (IOP) measurements

	Mean (standard deviation) of IOP (in mmHg)
Baseline IOP	Baseline Visit #1	Baseline Visit #2	P-Value^*
Mean of 3 measurements	27.6 (5.9)	27.3 (5.8)	0.0192
1^st measure	28.7 (6.5)	27.9 (6.1)	<0.0001
2^nd measure	27.6 (6.2)	27.4 (6.1)	0.3721
3^rd measure	26.6 (6.1)	26.6 (5.9)	0.9127
Range of 3 measurements	4.3 (2.9)	3.8 (2.5)	0.0005
Standard deviation of 3 measurements	2.3 (1.5)	2.0 (1.3)	0.0004

P-values from paired t-tests