Development of Corneal Astigmatism (CA) according to Axial Length/Corneal Radius (AL/CR) Ratio in a One-Year Follow-Up of Children in Beijing, China

Table 2

Oculometric parameters of the students in grades 1 and 4 in 2014 and 2015 () (n).

	Grade 1 (aged 5–8 years)	Grade 4 (aged 9–11 years)
UCVA ± s (n)
Year 2014	1.02 ± 0.26 (1167)	0.83 ± 0.43 (769)
Year 2015	0.92 ± 0.30 (1167)	0.64 ± 0.37 (769)
	0.001	0.001
95% CI	−0.12∼−0.08	−0.21∼−0.16
AL ± smm (n)
Year 2014	22.73 ± 0.73 (1161)	23.65 ± 0.93 (942)
Year 2015	23.14 ± 0.86 (1161)	24.03 ± 1.02 (942)
	0.001	0.001
95% CI	0.38∼0.44	0.35∼0.41
K ± sD (n)
Year 2014	43.29 ± 1.46 (1078)	43.29 ± 1.44 (850)
Year 2015	43.30 ± 1.45 (1078)	43.31 ± 1.43 (850)
	0.768	0.710
95% CI	−0.14∼0.10	−0.09∼0.13
CA ± sD (n)
Year 2014	1.11 ± 0.62 (1078)	1.13 ± 0.59 (850)
Year 2015	1.13 ± 0.59 (1078)	1.15 ± 0.59 (850)
	0.440	0.311
95% CI	−0.03∼0.07	−0.02∼0.07
CR ± smm (n)
Year 2014	7.80 ± 0.26 (1078)	7.80 ± 0.26 (850)
Year 2015	7.81 ± 0.26 (1078)	7.80 ± 0.26 (850)
	0.791	0.716
95% CI	−0.02∼0.02	−0.02∼0.02
AL/CR ± s (n)
Year 2014	2.91 ± 0.17 (1078)	3.03 ± 0.12 (849)
Year 2015	2.97 ± 0.11 (1078)	3.08 ± 0.15 (849)
	0.001	0.001
95% CI	0.05∼0.07	0.04∼0.06

s = standard deviation; mm = millimeter; D = diopter; .