Comparison of Ocular Biometry Profiles in Urban and Rural Cataract Candidates in Eastern China

Table 3

Descriptive statistics of mean K reading in 4 age groups.

Age group (years)	Shanghai (urban)	Jinshan (rural)
	K (D) mean ± SD	K (D) mean ± SD
Group A (50–59)	44.11 ± 1.57^#+	44.52 ± 1.75
Group B (60–69)	44.56 ± 1.50^#	44.44 ± 1.55
Group C (70–79)	44.40 ± 1.57^+	44.56 ± 1.51
Group D (>=80)	44.34 ± 1.45	44.54 ± 1.40
value	<0.001	0.427

K mean: keratometry; D: diopter; SD: standard deviation; value represents the difference among four age groups of Shanghai/Jinshan; ^# Group A vs. Group B. ⁺ Group A vs. Group C. Group B vs. Group D. Multiple comparison between each two age groups in Jinshan showed no statistical difference; multiple comparison between each other two age groups in Shanghai showed no statistical difference.