Table 3. Unadjusted and adjusted odds ratios for the associations between type, amount, and concentration of tea and cataract.

Tea intake	Cataract		No cataracts		Unadjusted			Multi-adjusteda
	No.	%	No.	%	OR	95% CI	P value	OR	95% CI	P value
Type of tea
None	351	85.8	6465	72.4	1.00	Reference		1.00	Reference
Green tea	43	10.5	1909	21.4	0.42	0.30–0.57	0.000	0.58	0.40–0.85	0.005
Black tea	8	2.0	480	5.4	0.31	0.15–0.62	0.001	0.80	0.35–1.81	0.591
Other	7	1.7	80	0.9	1.61	0.74–3.52	0.230	1.53	0.58–4.02	0.390
Tea intake, cups per week
None	351	85.8	6465	72.4	1.00	Reference		1.00	Reference
<14	19	4.6	532	6.0	0.66	0.41–1.05	0.081	0.92	0.54–1.57	0.765
14–27	21	5.1	971	10.9	0.40	0.26–0.62	0.000	0.55	0.33–0.93	0.025
≥28	18	4.4	966	10.8	0.34	0.21–0.55	0.000	0.58	0.34–0.99	0.044
Concentration of tea
Zero	351	85.8	6465	72.4	1.00	Reference		1.00	Reference
Light	20	4.9	582	6.5	0.63	0.40–1.00	0.051	0.90	0.54–1.51	0.698
Moderate	24	5.9	1457	16.3	0.30	0.20–0.46	0.000	0.43	0.27–0.71	0.001
Thick	14	3.4	430	4.8	0.60	0.35–1.03	0.065	1.04	0.56–1.92	0.897

CI, confidence interval; OR, odds ratio.

^aAdjusted for sex, ethnicity, age, BMI, education, marriage status, pesticide, dust, irritant gas and heavy metal exposure, family income, health insurance, high blood pressure, hyperlipidemia, diabetes, family history of cataract, smoking, alcohol drinking, physical activity, and intake of vitamin A, β-carotene, vitamin B, vitamin C, vitamin E, calcium tablets and iron.