Regular Chinese Green Tea Consumption Is Protective for Diabetic Retinopathy: A Clinic-Based Case-Control Study

Table 3

Crude odds ratio of regular Chinese green tea consumption for diabetic retinopathy in the overall study participants and stratified by sex.

Number of subjects	All			Male			Female
	Case	Control	Total	Case	Control	Total	Case	Control	Total
Regular Chinese green tea (+)	23	38	139	14	16	30	9	22	31
Regular Chinese green tea (−)	77	62	61	20	18	38	57	44	101
Total	100	100	200	34	34	68	66	66	132
Odds ratio	0.49			0.79			0.32
95 CI	0.26, 0.90			0.30, 2.06			0.13, 0.75
value	0.02			0.63			0.01