Anterior Lens Curvature Matters in the Course of Primary Angle Closure: An Analysis Based on Ultrasound Biomicroscopic Imaging

Table 1

Comparison of demographic data and biometric characteristics of APAC, CPAC, PACS, and normal control groups.

Characteristics	APAC	CPAC	PACS	NC	value
By subject	N = 111	N = 78	N = 75	N = 54
Age (yrs)	66.05 ± 8.49	63.36 ± 10.32	67.37 ± 8.35	66.70 ± 8.96	0.036
Gender (%)					<0.001
Male	24 (21.62)	36 (46.15)	15 (20.00)	19 (35.19)
Female	87 (78.38)	42 (53.85)	60 (80.00)	35 (64.81)
By eye	N = 140	N = 116	N = 84	N = 95
AL (mm)	22.34 ± 0.76	22.71 ± 1.46	22.78 ± 1.13	23.50 ± 1.15	<0.001
ACD (mm)	1.63 ± 0.26	1.93 ± 0.29	1.84 ± 0.24	2.54 ± 0.35	<0.001
LT (mm)	4.99 ± 0.33	4.73 ± 0.40	4.91 ± 0.43	4.33 ± 0.56	<0.001
Kf (D)	44.24 ± 1.53	44.20 ± 1.54	43.86 ± 1.59	43.72 ± 1.99	0.055
Ks (D)	45.29 ± 1.76	45.15 ± 1.66	44.87 ± 1.97	44.33 ± 2.06	<0.001
ALR (mm)	7.90 ± 1.07	8.84 ± 1.11	8.45 ± 1.13	9.46 ± 1.16	<0.001

Continuous values are presented as mean ± standard deviation (SD). Categorical data are presented as percentage. values are from univariate analysis with mixed effect linear models. APAC, acute primary angle closure; CPAC, chronic primary angle closure; PACS, primary angle closure suspect; NC, normal controls; AL, axial length; ACD, anterior chamber depth; LT, lens thickness; Kf, flat keratometry; Ks, steep keratometry; ALR, radius of anterior lens curvature.