Table 2.

Subanalysis of POBF in relation to sex, age, and refraction

	Mean resting POBF (SD) (μl/min)	p Value	Mean fall in POBF with Valsalva (SD) (μl/min)	p Value
Males	871.2 (301.5)	0.028	312.0 (340.2)	0.038 (adjusted)
Females	1077.4 (409.2)		328.1 (291.3)
<60	1107.7 (486.5)	0.005	340.57 (284.5)	NS (adjusted)
>60	906.2 (371.4)		298.35 (349.2)
Myopes (<−2D)	770.7 (182.2)	NS	655.2 (346.5)	NS (adjusted)
Emmetropes (−2 to +2D)	1047.3 (464.8)		675.0 (746.3)
Hypermetropes (.+2D)	1227.6 (452.2)		1062.4 (463.7)

NS = non-significant at 5% level.

Note: refer to text for explanation of “adjusted” p values.