Table 1 General characteristics of hypertensive people, who did not join, joined after screening survey or joined the management programme later

Age (years) (mean ± SD)

54.7 ± 16.1**

65.5 ± 14.1

65.6 ± 12.4

Male (%)

42.4

46.2

48.2

Education status

Primary school or lower (%)

26.5**

45.0 **

-

Secondary school or higher (%)

73.5 **

55.0 **

-

Marital status

Married (%)

82.1

75.2

-

Other (%)

17.9

24.8

-

Occupation

Manual worker (%)

51.7 **

32.1 **

-

Other (%)

48.3 **

67.9 **

-

Distance to health station (km)

0.95 ± 0.48

1.00 ± 0.49

-

Having insurance (%)

35.8

44.0

-

Having voluntary insurance (%)

4.6

3.1

-

Initial systolic BP (mean ± SD)

148.5 ± 16.8 **

163.4 ± 19.4 **

174.5 ± 21.2 **

Initial diastolic BP (mean ± SD)

88.3 ± 9.1 **

92.7 ± 11.6 **

96.7 ± 13.1 **

Initial blood pressure categories

Pre-hypertensive stages ⁺ (%)

0.7

0.6

0.0 **

Hypertension stage I (%)

79.5 **

45.9 **

22.0 **

Hypertension stage II (%)

12.6 **

32.4

36.9

Hypertension stage III (%)

7.3 **

21.1 **

41.1 **

Number of behavioural CVD risk factors

1.0 ± 0.8 **

0.6 ± 0.8

0.7 ± 0.8

Having history of CVD (%)

20.5 **

50.9 **

6.4 **

Having history of chronic disease (%)

16.6 *

10.1

7.1

Having family history of CVD (%)

31.1 **

14.8

17.0