Table 2

Comparisons of global, annular and quadratic PCDs among the APAC, POAG and control groups

PCD, % mean (SD)	APAC N=40	POAG N=65	Controls N=44	P value
PCD, % mean (SD)	APAC N=40	POAG N=65	Controls N=44	Among* 3 groups	APAC† versus controls	POAG† versus controls	APAC† versus POAG
Global (mean±SD)	21.97±7.52	20.41±8.70	27.25±5.33	<0.001	0.009	<0.001	0.975
Annular (mean±SD)	24.26±8.26	24.79±10.35	29.93±5.60	0.007	0.016	0.015	1.000
Superior (median (IQR))	20.32 (14.09–24.74)	20.45 (12.85–27.41)	29.67 (25.45–31.65)	<0.001	<0.001	<0.001	0.308
Inferior (median (IQR))	19.73 (15.95–25.88)	20.18 (12.26–28.65)	29.18 (25.02–34.09)	<0.001	<0.001	<0.001	0.327
Nasal (median (IQR))	20.90 (16.11–27.11)	24.08 (17.23–36.61)	26.51 (22.71–29.83)	0.061	0.010	0.173	0.049
Temporal mean±SD)	30.16±9.82	28.55±12.41	33.56±7.40	0.073	0.493	0.068	1.000

*P values represent comparisons between APAC, POAG, and control groups using analysis of variance analysis.
†P value represent pairwise comparison between each groups using Bonferroni correction or Dunn’s test.
APAC, acute primary-angle closure; PCD, peripapillary perfused capillary density; POAG, primary open-angle glaucoma.;