Table 1

Baseline characteristics of the participants in control and intervention groups

CharacteristicsOverall
(n=210)
Control
(n=107)
Intervention
(n=103)
Demographic characteristics
 Males, n (%)103 (49.0)52 (48.6)51 (49.5)
 Age at recruitment, mean (SD), year54.3 (7.8)54.5 (7.8)54.1 (7.8)
 Education more than high school, n (%)56 (26.7)27 (25.2)29 (28.2)
 Insurance in Shenzhen, n (%)120 (57.1)60 (56.1)60 (58.3)
Modifiable CVD risk factors
 BMI, mean (SD), kg/m2 25.2 (3.2)24.7 (3.0)25.7 (3.3)
 Systolic blood pressure, mean (SD), mmHg133.4 (12.2)132.5 (12.4)134.6 (11.9)
 Diastolic blood pressure, mean (SD), mmHg88.0 (9.4)87.0 (9.5)89.0 (9.2)
 Total cholesterol, mean (SD), mmol/l5.3 (1.0)5.3 (0.9)5.3 (1.0)
10-year CVD risk estimated, median (IQR), %7.0 (4.0, 11.0)7.0 (4.0, 12.0)7.0 (4.0, 11.0)
Family history
 Hypertension, n (%)161 (76.7)81 (75.7)80 (77.7)
 CVD history, n (%)23 (11.0)11 (10.3)12 (11.8) 2
Medical history related to hypertension
 Types of medicine taken, median (IQR)1.0 (1.0, 2.0)1.0 (0.3, 2.0)1.0 (1.0, 2.0)
 Types of antihypertensive medicine taken median (IQR)1.0 (1.0, 2.0)1.0 (1.0, 2.0)1.0 (1.0, 1.5)
 Years since hypertension diagnosed, median (IQR), year4.7 (2.2, 10.2)5.3 (2.4, 10.1)4.2 (2.0, 10.1)
 Years of taking antihypertensive medicines, median (IQR), year4.1 (1.8, 9.7)4.8 (1.9, 9.8)3.1 (1.5, 7.9)
Knowledge about CVDs
 Correctly answered all questions, n (%)19 (9.1)10 (9.4)9 (8.8)
 Self-estimated 10 year CVD risk, median (IQR), %50.0 (50.0, 75.0)50.0 (30.0, 70.0)60.0 (50.0, 80.0)
 Self-estimated absolute risk reduction by antihypertensive medicines, median (IQR), %30.0 (20.0, 40.0)30.0 (20.0, 37.5)30.0 (20.0, 50.0)
History of antihypertensive treatment
 Taking medications, n (%)131 (62.4)63 (58.9)68 (66.0)
 Good adherence, n (%)91 (43.4)43 (40.2)48 (46.6)
CVD-related lifestyle factors
 Smoking, n (%)31 (14.8)20 (18.7)11 (10.7)
 Alcohol drinking, n (%)31 (14.7)12 (11.2)19 (18.4)
 Physical exercise, n (%)142 (67.6)76 (71.0)66 (64.1)
 High salt intake, n (%)56 (32.6)26 (29.5)30 (35.7)
 High fat intake, n (%)43 (25.3)18 (20.5)25 (30.5)
  • BMI, body mass index; CVD, cardiovascular disease; IQR, interquartile range; SD, standard deviation.