Table 1.

Baseline clinical features of the subjects

		N	Mean ± SD	95% confidence interval for mean
				Lower bound	Upper bound
Age (years)	Control	45	50.4 ± 6.2	48.58	52.34
	<5 years	30	49.0 ± 14.0	43.80	54.32
	≥5 years	44	53.5 ± 12.5	49.76	57.37
Cumulative dose (g)	Control	45	.	.	.
	<5 years	30	231.28 ± 215.9	150.63	311.92
	≥5 years	44	794.62 ± 473.2	650.75	938.49
Duration of HCQ use (years)	Control	45	.	.	.
	<5 years	30	1.8 ± 1.1	1.4	2.2
	≥5 years	44	9.6 ± 5.0	8.0	11.14
Best-corrected visual acuity (logMAR)	Control	45	1.0 ± 0	1.0	1.0
	<5 years	30	0.9 ± 0.1	0.8	0.9
	≥5 years	44	0.9 ± 0.1	0.9	0.9
Spherical equivalent	Control	45	0.056 ± 0.24	−0.06	0.07
	<5 years	30	0.14 ± 0.64	−0.09	0.38
	≥5 years	44	0.12 ± 0.58	−0.05	0.30
Body mass (kg)	Control	.	.	.	.
	<5 years	30	67.3 ± 13.14	62.4	72.2
	≥5 years	44	71.3 ± 15.9	66.5	76.2