Table 4 Demographic characteristics of interviewed study participants age 15–64 years in KAIS 2007, KAIS 2012 and KENPHIA 2018

Characteristic

Weighted % (95% CI)

Weighted % (95% CI)

Weighted % (95% CI)

Weighted % (95% CI)

Sex

 < .001

 Male

42.9(42.0—43.8)

49(48.0—50.0)

49.3(48.6—50.0)

46.8(46.1—47.6)

 Female

57.1(56.2—58.0)

51(50.0—52.0)

50.7(50.0—51.4)

53.2(52.4—53.9)

Total

100

100

100

100

Age of the respondent

 < .001

 15–19

16.8(16.0—17.5)

16.8(15.8—17.7)

17(16.3—17.7)

16.8(16.1—17.4)

 20–24

16.9(16.1—17.7)

16.3(15.4—17.1)

14.6(13.8—15.4)

16.5(15.9—17.1)

 25–29

13.9(13.3—14.6)

15.6(14.8—16.4)

13.7(13.0—14.5)

15(14.4—15.6)

 30–34

11.8(11.2—12.5)

12.3(11.7—13.0)

14(13.4—14.5)

12.2(11.7—12.6)

 35–39

10.5(9.9—11.0)

10.4(9.8—11.0)

10.4(9.9—10.9)

10.4(10.0—10.9)

 40–44

8.1(7.6—8.6)

8.5(8.0—9.0)

9(8.6—9.5)

8.4(8.0—8.8)

 45–49

7.9(7.4—8.4)

6.2(5.8—6.7)

6.8(6.5—7.2)

6.8(6.5—7.2)

 50–54

5.4(5.0—5.8)

6.1(5.7—6.6)

5.8(5.4—6.1)

5.9(5.5—6.2)

 55–59

5.2(4.8—5.6)

4.3(3.9—4.8)

4.8(4.4—5.1)

4.6(4.3—4.9)

 60–64

3.5(3.2—3.9)

3.4(3.0—3.8)

3.9(3.6—4.1)

3.5(3.2—3.7)

Total

100

100

100

100

Place of residence

 < .001

 Urban

22.3(19.7—24.9)

37.1(34.7—39.5)

39.3(37.2—41.4)

31.8(30.1—33.6)

 Rural

77.7(75.1—80.3)

62.9(60.5—65.3)

60.7(58.6—62.8)

68.2(66.4—69.9)

Total

100

100

100

100

Level of education

 < .001

 No education

10.6(9.5—11.7)

7.3(6.0—8.6)

6.4(5.1—7.7)

8.5(7.5—9.4)

 Primary

55.7(54.0—57.5)

59.4(57.3—61.5)

47.4(45.9—48.9)

58.1(56.6—59.6)

 Secondary + 

33.7(31.8—35.5)

33.3(31.2—35.4)

46.2(44.6—47.9)

33.4(32.0—34.9)

Total

100

100

100

100

Marital status

 < .001

 Never married

29.2(28.1—30.3)

33.6(32.2—34.9)

34.7(33.7—35.6)

32(31.0—32.9)

 Separated/Divorced/Widowed

10.6(10.0—11.2)

4.2(3.8—4.6)

6(5.6—6.4)

6.5(6.1—6.9)

 Married/Living together

60.3(59.0—61.5)

62.3(60.9—63.7)

59.4(58.3—60.4)

61.5(60.6—62.5)

Total

100

100

100

100

Wealth index

 < .001

 Poorest

14.7(13.0—16.5)

19.2(16.6—21.8)

19.3(17.5—21.1)

17.6(15.8—19.4)

 Poorer

18.2(16.6—19.8)

20.8(18.9—22.7)

21(19.7—22.3)

19.9(18.5—21.2)

 Middle

20.3(18.8—21.8)

19.8(17.9—21.7)

20.3(19.1—21.5)

20(18.7—21.3)

 Richer

21.7(19.9—23.4)

19.3(17.2—21.4)

19.7(18.0—21.3)

20.1(18.6—21.6)

 Richest

25.1(22.4—27.8)

20.8(18.1—23.6)

19.7(17.5—22.0)

22.3(20.4—24.3)

 Total

100

100

100

100