Table 1. Comparison of baseline characteristics during the pre-COVID period, lockdown (phase 1-4), and unlocking (phase 1-10) for diabetic retinopathy patients.

*As compared to pre-COVID-19

DR: diabetic retinopathy; NPDR: non-proliferative diabetic retinopathy; PDR: proliferative diabetic retinopathy; DME: diabetic macular edema; STDR: sight-threatening diabetic retinopathy; NSDR: non-sight threatening diabetic retinopathy; COVID 19: coronavirus disease 2019

Variable		n	%	Pre-COVID-19	%	Lockdown (phase 1-4)	%	Unlock (phase 1-10)	%	p-Value*
Total DR		21,271	100	12,285	58	456	2	8530	40
Gender	Male	15,045	71	8570	70	342	75	6133	72	0.32
	Female	6226	29	3715	30	114	25	2397	28	0.07
Age (years)	0-30	150	0.7	76	0.6	5	1	69	0.8	0.21
	31-40	760	3.6	411	3	26	6	323	4	0.009
	41-50	4464	21	2476	20	117	26	1871	22	0.022
	51-60	8663	41	4949	40	187	41	3527	41	0.84
	61-70	5863	28	3522	29	102	22	2239	26	0.025
	71-100	1371	6	851	7	19	4	501	6	0.030
Socio-economic status	Paying	18,403	87	10,399	85	408	90	7596	89	0.42
	Nonpaying	2868	13	1886	15	48	10	934	11	0.013
Geographic status	Urban	9616	46	5699	47	197	43	3720	44	0.41
	Rural	8799	41	4939	40	182	40	3678	43	0.93
	Metropolitan	2856	13	1647	13	77	17	1132	13	0.06
Distance to eye care center	Intracity	6132	29	3282	27	189	41	2661	31	<0.00001
	Intrastate	10,950	51	6087	50	235	52	4628	54	0.63
	Interstate	4189	20	2916	24	32	7	1241	15	<0.00001
Type of DR	NPDR	8675	41	5343	44	116	25	3216	38	<0.00001
	PDR	8170	38	4430	36	255	56	3485	41	<0.00001
	DME	4426	21	2512	20	85	19	1829	21	0.44
	STDR	13,875	65	7697	63	360	79	5818	68	0.001
	NSTDR	7396	35	4588	37	96	21	2712	32	<0.00001