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. 2007 Aug 16;91(11):1493–1498. doi: 10.1136/bjo.2006.108084

Table 4 Two‐tailed independent samples T test for equality of preattentive visual search and choice reaction time mean response times across glaucoma subtypes.

Flicker Displacement Orientation CRT
POAG vs LTG T  =  1.110 T  =  1.113 T  =  1.844 T  =  0.167
p = 0.276 p = 0.274 p = 0.075 p = 0.868
dF  =  31 dF  =  31 dF  =  28.791 dF  =  31
POAG vs PXF T  =  1.012 T  =  0.803 T  =  1.243 T  =  1.696
p = 0.320 p = 0.429 p = 0.085 p = 0.101
dF  =  28 dF  =  28 dF  =  27.631 dF  =  28
LTG vs PXF T  =  0.026 T  =  −0.410 T  =  −0.706 T  =  2.096
p = 0.980 p = 0.687 p = 0.490 p = 0.051
dF  =  17 dF  =  17 dF  =  17 dF  =  17

CRT, choice reaction time; dF, degrees of freedom; LTG, low‐tension glaucoma; POAG, primary open angle glaucoma; PSI, perceptual search index; PXF, pseudoexfoliative glaucoma.