. Author manuscript; available in PMC: 2016 Sep 1.

Published in final edited form as: Am J Ophthalmol. 2015 Jun 17;160(3):506–515.e1. doi: 10.1016/j.ajo.2015.06.002

Table 2.

Comparison of Demographics and Anterior Segment Biometric Parameters between Open and Narrow Angles within Ethnic Groups

Ethnicity	Ethnicity	Narrow Angle	Open Angle	P Value
No. Patients	White	61	105
	Chinese	41	91
	African	28	62
	Hispanic	36	39
Age (years)	White	68.3 ± 12.6^*	65.1 ± 13.1^*	0.128^Ω
	Chinese	70.4 ± 14.9^*	62.0 ± 16.1^*	0.004^Ω
	African	64.9 ± 9.8^*	61.7 ± 14.1^*	0.216^Ω
	Hispanic	66.7 ± 13.0^*	67.4 ± 13.6^*	0.822^Ω
Sex (% female)	White	63.93%	47.62%	0.042^Φ
	Chinese	70.73%	51.65%	0.040^Φ
	African	78.57%	58.06%	0.059^Φ
	Hispanic	83.33%	48.72%	0.001^Φ
SE (diopters)	White	1.0 ± 2.2^*	−1.3 ± 3.0^*	<0.0001^Ω
	Chinese	0.8 ± 3.3^*	−3.1 ± 3.7^*	<0.0001^Ω
	African	−0.2 ± 1.6^*	−0.1 ± 2.4^*	0.951^Ω
	Hispanic	0.9 ± 1.9^*	−1.0 ± 3.6^*	0.013^Ω
PD (mm)	White	3.7 ± 1.4^*	4.0 ± 1.3^*	0.096^Ω
	Chinese	3.5 ± 1.5^*	4.4 ± 1.1^*	0.002^Ω
	African	3.8 ± 1.0^*	4.0 ± 0.9^*	0.240^Ω
	Hispanic	4.2 ± 0.7^*	3.9 ± 1.1^*	0.201^Ω
ACA (mm²)	White	18.3 ± 2.9^*	22.7 ± 3.9^*	<0.0001^Ω
	Chinese	17.1 ± 2.3^*	21.9 ± 4.1^*	<0.0001^Ω
	African	18.2 ± 2.4^*	22.6 ± 4.0^*	<0.0001^Ω
	Hispanic	17.0 ± 2.2^*	21.4 ± 3.5^*	<0.0001^Ω
ACV (mm³)	White	123.0 ± 25.5^*	161.3 ± 35.3^*	<0.0001^Ω
	Chinese	110.6 ± 19.2^*	149.4 ± 34.8^*	<0.0001^Ω
	African	120.2 ± 20.4^*	157.6 ± 34.5^*	<0.0001^Ω
	Hispanic	110.8 ± 18.9^*	147.1 ± 31.9^*	<0.0001^Ω
ACW (mm)	White	12.0 ± 0.5^*	12.1 ± 0.5^*	0.166^Ω
	Chinese	11.5 ± 0.4^*	11.7 ± 0.4^*	0.011^Ω
	African	11.8 ± 0.4^*	12.0 ± 0.4^*	0.020^Ω
	Hispanic	11.7 ± 0.4^*	11.8 ± 0.5^*	0.657^Ω
LV (mm)	White	0.76 ± 0.23^*	0.41 ± 0.28^*	<0.0001^Ω
	Chinese	0.68 ± 0.22^*	0.29 ± 0.33^*	<0.0001^Ω
	African	0.63 ± 0.21^*	0.24 ± 0.26^*	<0.0001^Ω
	Hispanic	0.69 ± 0.21^*	0.33 ± 0.28^*	<0.0001^Ω
IT750 (mm)	White	0.43 ± 0.07^*	0.43 ± 0.08^*	0.532^Ω
	Chinese	0.48 ± 0.10^*	0.46 ± 0.07^*	0.372^Ω
	African	0.49 ± 0.09^*	0.44 ± 0.09^*	0.022^Ω
	Hispanic	0.47 ± 0.09^*	0.44 ± 0.06^*	0.075^Ω
IAREA (mm²)	White	1.58 ± 0.25^*	1.50 ± 0.23^*	0.051^Ω
	Chinese	1.64 ± 0.25^*	1.57 ± 0.23^*	0.137^Ω
	African	1.71 ± 0.18^*	1.64 ± 0.28^*	0.148^Ω
	Hispanic	1.61 ± 0.26^*	1.61 ± 0.32^*	0.999^Ω
CCT (μm)	White	562 ± 33	557 ± 34	0.318^Ω
	Chinese	555 ± 52	551 ± 38	0.678^Ω
	African	540 ± 36	537 ± 38	0.696^Ω
	Hispanic	556 ± 30	554 ± 36	0.760^Ω
IOP (mm Hg)	White	16.4 ± 3.7	16.2 ± 3.8	0.753^Ω
	Chinese	16.5 ± 3.7	16.0 ± 2.7	0.392^Ω
	African	17.2 ± 3.1	16.5 ± 4.0	0.421^Ω
	Hispanic	17.5 ± 5.6	17.3 ± 3.4	0.840^Ω

SE = spherical equivalent; PD = pupil diameter; ACA = anterior chamber area; ACV = anterior chamber volume; ACW = anterior chamber width; LV = lens vault; IT750 = iris thickness measured at 750 μm from the scleral spur; IAREA = iris area; CCT = central corneal thickness; IOP = intraocular pressure.

Data are expressed as mean value ± standard deviation.

^Φ

P values by Pearson Chi Square.

^Ω

P values by independent Student t tests.