Table 2. Hazard ratios of incident hypertension according to quartiles of total physical activity.

Variables	Quartile 1 (n= 13,482)	Quartile 2 (n= 13,561)	Quartile 3 (n= 13,783)	Quartile 4 (n= 14,275)	P-trend
Model 1: adjusted for age, gender, BMI, region, and area. Model 2: adjusted for covariates in model 1 plus educational level, smoking status, alcohol drinking status, blood glucose level and total cholesterol level. Model 3: adjusted for covariates in model 2 plus baseline SBP. **P < 0.001 vs. the quartile 1 group.
Cases	3,519	3,228	2,699	2,765	−
Person-years	103,172.97	101,592.40	93,965.42	95,306.86	−
Incidence rate (per 1000 person-years)	34.10	31.77	28.72	29.01	−
HR (95% CI)
Model 1	1.00	1.01 (0.96−1.06)	0.86 (0.81−0.91)**	0.80 (0.76−0.84)**	< 0.001
Model 2	1.00	1.01 (0.96−1.06)	0.87 (0.82−0.92)**	0.80 (0.76−0.85)**	< 0.001
Model 3	1.00	1.01 (0.96−1.06)	0.86 (0.81−0.91)**	0.81 (0.77−0.86)**	< 0.001