Table 2 Observed 1-year prevalence (% [95% confidence interval]) by gender, age and habitation, and by headache type

All

23.3 [20.9-25.9]

24.2 [21.8-26.9]

19.1 [16.9-21.5]

12.7 [10.9-14.8]

28.3 [25.7-31.1]

Gender

Male

18.0 [14.7-21.8]

27.8 [23.8-32.1]

14.9 [11.9-18.5]

9.3 [7.0-12.4]

21.3 [17.8-25.3]

Female

27.1 [23.8-30.7]

21.7 [18.7-25.1]

22.1 [19.0-25.4]

15.1 [12.5-18.1]

33.1 [29.5-36.8]

Age (yr)

18-29

24.9 [20.7-29.5]

24.3 [20.2-29.0]

14.6 [11.3-18.6]

7.0 [4.8-10.1]

24.9 [20.7-29.5]

30-39

22.1 [18.1-26.7]

27.7 [23.3-32.5]

17.5 [13.9-21.7]

12.5 [9.4-16.3]

28.0 [23.6-32.8]

40-49

26.6 [21.0-33.0]

23.2 [17.9-29.4]

20.2 [15.4-26.3]

15.5 [11.1--21.1]

30.0 [24.1-36.5]

50-65

17.7 [12.3-24.7]

17.0 [11.7-26.5]

32.7 [25.6-40.6]

23.8 [17.6-31.3]

34.7 [27.5-42.7]

Habitation

Rural

21.7 [16.5-28.0]

22.7 [17.4-29.1]

4.0 [1.9-7.9]

2.0 [0.6-5.3]

11.6 [7.8-16.9]

Urban

23.7 [21.0-26.6]

24.6 [21.9-27.5]

22.4 [19.8-25.3]

15.1 [12.9-17.6]

32.1 [29.1-35.3]