Table 2.

Demographics and Ocular Measurements From A-Scan Ultrasound in American Caucasian, American Chinese, and Mainland Chinese

	American Caucasian, n = 117	American Chinese, n = 129	Mainland Chinese, n = 112	P Value
Age, y	59.7 ± 11.6	59.4 ± 12.0	59.4 ± 11.7	0.98
Sex, M/F	63/54	62/67	51/61	0.43*
SE, D	−1.42 ± 3.9	−2.10 ± 3.8	−0.07 ± 2.2	<0.0001†
AL, mm	24.3 ± 1.7	24.5 ± 2.02	23.4 ± 1.0	<0.0001†
LT, mm	4.51 ± 0.4	4.49 ± 0.5	4.70 ± 0.4	0.0002†
ACD, mm	3.42 ± 0.3	3.23 ± 0.4	2.94 ± 0.4	<0.0001†

Demographic data and ocular measurements compared among three ethnic groups using ANOVA. Data are presented as mean ± SD except for sex, which is presented as male-to-female ratio. Numbers in bold denote statistical significance (P < 0.05).

^*P value from Pearson χ² test among all three groups.

^†When pairwise comparisons were done, mainland Chinese were found to be significantly different from the other two cohorts. No significant differences were detected between American Caucasians and American Chinese.