The association between daily total physical activity and risk of cardiovascular disease among hypertensive patients: a 10-year prospective cohort study in China

Table 3 Hazard ratios (95% CI) of CVD across quartiles of total physical activity stratified by age in this study

	No. of Observations	No. of Cases	Person years of follow-up	Incidence density (1/1000 person-years)	Model 1 Hazard ratio (95%CI)	P value	Model 2 Hazard ratio (95%CI)	P value
Age (years)
< 50	5038	181	53,207	3.40
Q1	464	30	4976	6.03	1.00		1.00
Q2	1005	34	10,574	3.22	0.53 (0.33–0.87)	0.012*	0.58 (0.35–0.97)	0.037*
Q3	1580	46	16,701	2.75	0.46 (0.29–0.72)	< 0.001*	0.51 (0.31–0.82)	0.006*
Q4	1989	71	20,956	3.39	0.56 (0.37–0.86)	0.008*	0.63 (0.40–1.00)	0.051
50-	7365	579	78,045	7.42
Q1	1188	114	12,693	8.98	1.00		1.00
Q2	1971	164	21,016	7.80	0.87 (0.69–1.11)	0.260	0.91 (0.72–1.16)	0.440
Q3	2084	140	22,157	6.32	0.67 (0.52–0.86)	0.001*	0.70 (0.54–0.91)	0.007*
Q4	2122	161	22,179	7.26	0.72 (0.56–0.92)	0.008*	0.79 (0.61–1.02)	0.071
60-	5666	1027	59,177	17.35
Q1	2081	429	21,372	20.07	1.00		1.00
Q2	1600	272	16,770	16.22	0.82 (0.70–0.96)	0.012*	0.83 (0.71–0.96)	0.015*
Q3	1143	196	12,274	15.97	0.78 (0.66–0.92)	0.004*	0.78 (0.66–0.93)	0.006*
Q4	842	130	8761	14.84	0.67 (0.55–0.82)	< 0.001*	0.69 (0.56–0.85)	< 0.001*
≥ 70	2110	632	20,637	30.62
Q1	1186	370	11,351	32.60	1.00		1.00
Q2	590	181	5895	30.70	0.96 (0.80–1.15)	0.674	0.97 (0.81–1.16)	0.712
Q3	239	57	2403	23.72	0.71 (0.54–0.94)	0.016*	0.70 (0.53–0.93)	0.014*
Q4	95	24	988	24.29	0.70 (0.47–1.07)	0.097	0.71 (0.47–1.09)	0.115

Model 1 was adjusted for gender
Model 2 was additionally adjusted for smoking status, alcohol consumption, intake frequencies of red meat, intake frequencies of fresh fruit, prevalent diabetes at baseline, leisure-sedentary time and BP-levels
* P < 0.05

ISSN: 1471-2458