Table 6. Subgroup analyses for blood pressure progression and incident hypertension associated with habitual tea drinking by specific characteristics.

Subgroup	Blood pressure progression				Hypertension incidence
	Number of cases/Total number	OR (95% CI)*	Pinteraction-value		Number of cases/Total number	HR (95% CI)**	Pinteraction-value
*Refers to ORs were derived from multivariable logistic regression analysis adjusting for age, sex, body mass index, baseline systolic blood pressure, region, smoking, drinking, physical activity, education level, fasting blood glucose, total cholesterol, and family history of hypertension. **Refers to HRs were derived from multivariable Cox regression analysis adjusting for age, sex, body mass index, baseline systolic blood pressure, region, smoking, drinking, physical activity, education level, fasting blood glucose, total cholesterol, and family history of hypertension. CI: confidence interval; HR: hazard ratio; OR: odds ratio.
Age, yrs			0.053				0.312
< 50	7,536/19,605	0.85 (0.79−0.91)			2,092/19,605	0.88 (0.80−0.97)
50–60	5,583/11,403	0.82 (0.74−0.90)			1,955/11,403	0.87 (0.77−0.97)
≥ 60	4,538/7,905	0.87 (0.77−0.98)			1,888/7,905	0.83 (0.73−0.94)
Sex			0.004				0.001
Male	6,317/13,846	0.77 (0.71−0.83)			2,308/13,846	0.96 (0.88−1.05)
Female	11,340/25,067	0.90 (0.84−0.97)			3,627/25,067	0.76 (0.69−0.84)
Body mass index, kg/m2			0.102				0.437
< 24	10,864/24,377	0.86 (0.81−0.92)			3,177/24,377	0.88 (0.81−0.96)
≥ 24	6,793/14,536	0.81 (0.74−0.88)			2,758/14,536	0.84 (0.77−0.92)
Baseline blood pressure, mmHg			0.943				0.560
< 120/75	9,396/17,027	0.87 (0.80−0.94)			1,092/17,027	0.90 (0.76−1.06)
120−129/75−84	5,744/14,119	0.86 (0.79−0.94)			2,326/14,119	0.80 (0.72−0.89)
130–139/85–89	2,517/7,767	0.84 (0.74−0.94)			2,517/7,767	0.89 (0.81−0.98)