Table 3

Mean difference in global, annular and quadratic PCDs between the three groups

PCD, %, mean (SD)	Mean difference	95% CI	P value
Global
Control	Reference
POAG	−3.46	−7.98 to 1.09	0.136
APAC	−4.66	−8.40 to −0.52	0.027
APAC versus POAG	−1.02	−5.70 to 3.67	0.671
Annular
Control	Reference
POAG	−0.77	−6.03 to 4.49	0.774
APAC	−4.06	−8.62 to 0.50	0.081
APAC versus POAG	−3.29	−8.68 to 2.10	0.232
Superior
Control	Reference
POAG	−4.31	−9.17 to 0.55	0.082
APAC	−6.89	−11.17 to −2.61	0.002
APAC versus POAG	−2.58	−7.69 to 2.52	0.322
Inferior
Control	Reference
POAG	−4.06	−10.00 to 1.88	0.181
APAC	−5.84	−10.97 to −0.70	0.026
APAC versus POAG	−1.78	−7.81 to 4.26	0.564
Nasal
Control	Reference
POAG	2.61	−4.00 to 9.22	0.438
APAC	−1.86	−7.62 to 3.91	0.528
APAC versus POAG	−4.47	−11.32 to 2.38	0.201
Temporal
Control	Reference
POAG	−1.18	−7.08 to 4.72	0.696
APAC	−3.60	−8.94 to 1.74	0.186
APAC versus POAG	−2.43	−8.81 to 3.96	0.456

Analysed by the marginal model of a generalised estimating equation adjusted for age, sex, axial length, VF MD and circumpapillary retinal nerve fibre layer thickness.
APAC, acute primary angle closure; MD, mean deviation; PCD, peripapillary perfused capillary density; POAG, primary open-angle glaucoma; VF, visual field.