Table 3.

Comparisons among 3 groups (nondippers, dippers, and overdippers).

	Nondippers	Dippers	Overdippers	P value
MD slope (dB/y)	−0.20 ± 0.21	−0.24 ± 0.20§	−0.28 ± 0.30†‡	0.000 ∗
MAP (mmHg)	95.1 ± 4.4	94.6 ± 3.3	90.7 ± 5.9†‡	0 .000 ∗
OPP (mmHg)	52.3 ± 6.1	51.7 ± 4.7	46.2 ± 5.4†‡	0.000 ∗
wSD	14.0 ± 2.0	13.9 ± 2.1	15.3 ± 1.3†‡	0.014 ∗

Expressed as the mean ± SD; ^∗comparison among 3 groups by one-way analysis of variance; statistical significance: P < 0.05; ^†significantly different compared with nondippers by post hoc multiple comparison (Bonferroni's test); ^‡significantly different compared with dippers by post hoc multiple comparison (Bonferroni's test); ^§significantly different compared with nondippers by post hoc multiple comparison (Bonferroni's test); MD: mean deviation; MAP: mean arterial pressure; OPP: ocular perfusion pressure; wSD: weighted standard deviation.