Table 2.

Baseline demographics of matched samples with standardized differences

Variable	DM (n=6621)	Controls (n=6621)	Std. Diff	NPDR (n=1307)	Controls (n=1307)	Std. Diff	PDR (n=327)	Controls (n=327)	Std. Diff
Age (years)	76.04	76.09	−1.01	75.25	75.67	−9.55	74.87	75.36	−11.70
Male gender	0.35	0.35	0.00	0.36	0.36	0.32	0.34	0.37	−5.11
Black race	0.07	0.07	0.24	0.13	0.20	−20.74	0.17	0.17	0.81
Other race	0.03	0.03	−0.36	0.04	0.04	0.00	0.05	0.06	−5.50
Hypertension	0.71	0.70	0.50	0.77	0.76	0.54	0.76	0.73	−6.33
Atherosclerosis	0.11	0.11	−0.05	0.14	0.14	0.22	0.15	0.18	−6.58
Stroke	0.19	0.19	0.66	0.21	0.24	−5.31	0.25	0.28	−7.62
Coronary heart disease	0.41	0.41	−0.06	0.44	0.46	−4.15	0.47	0.47	−0.61
Hyperlipidemia	0.45	0.45	0.12	0.41	0.39	4.06	0.38	0.41	−5.00
Charlson Index	1.88	1.73	6.66	3.53	2.05	54.03	3.79	2.75	34.65