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

Table 4 Hazard ratios (95%CI) of CVD across quartiles of total physical activity stratified by BP-levels 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
BP under control	3141	406	32,394	12.53
Q1	912	167	9235	18.08	1.00		1.00
Q2	853	116	8873	13.07	1.01 (0.79–1.29)	0.927	1.04 (0.81–1.33)	0.759
Q3	690	66	7217	9.15	0.86 (0.64–1.16)	0.321	0.88 (0.65–1.19)	0.410
Q4	686	57	7069	8.06	0.80 (0.58–1.10)	0.170	0.82 (0.59–1.15)	0.253
Stage 1 hypertension	11,508	1106	121,101	9.13
Q1	2536	437	26,195	16.68	1.00		1.00
Q2	2857	290	30,126	9.63	0.77 (0.67–0.90)	< 0.001*	0.78 (0.67–0.91)	0.001*
Q3	2969	185	31,634	5.85	0.58 (0.48–0.69)	< 0.001*	0.59 (0.49–0.71)	< 0.001*
Q4	3146	194	33,146	5.85	0.64 (0.53–0.77)	< 0.001*	0.66 (0.55–0.80)	< 0.001*
Stage 2 hypertension	4048	594	42,272	14.05
Q1	1057	214	10,833	19.75	1.00		1.00
Q2	1051	164	11,009	14.90	0.99 (0.81–1.22)	0.938	1.00 (0.81–1.23)	0.974
Q3	1015	131	10,777	12.16	0.98 (0.78–1.23)	0.864	1.01 (0.80–1.27)	0.957
Q4	925	85	9653	8.81	0.79 (0.60–1.04)	0.095	0.83 (0.62–1.10)	0.192
Stage 3 hypertension	1482	313	15,299	20.46
Q1	414	125	4129	30.27	1.00		1.00
Q2	405	81	4247	19.07	0.79 (0.59–1.05)	0.106	0.80 (0.60–1.07)	0.129
Q3	372	57	3907	14.59	0.65 (0.47–0.91)	0.011*	0.67 (0.49–0.96)	0.027*
Q4	291	50	3016	16.58	0.87 (0.60–1.25)	0.442	0.89 (0.61–1.30)	0.552

Model 1 was adjusted for age and 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 and leisure-sedentary time
* P < 0.05

ISSN: 1471-2458