Table 2 Observed 1-year prevalence (% [95% confidence intervals]) by gender, age and habitation, overall and by headache type, and adjusted values for gender, age and habitation

All (N = 2,385)

19.0 [17.4–20.6]

20.7 [19.1–22.3]

0.9 [0.5–1.3]

2.8 [2.2–3.6]

7.1 [6.2–8.2]

 Male (n = 1,057)

14.1 [12.0–16.2]

19.8 [17.4–22.2]

0.6 [0.2–1.3]

2.1 [1.4–3.2]

4.1 [2.9–5.3]

 Female (n = 1,328)

22.8 [20.5–25.1]

21.4 [19.2–23–6]

1.1 [0.7–1.9]

3.4 [2.5–4.5]

9.2 [7.7–10.8]

 18–25 (n = 583)

18.4 [15.3–21.6]

16.0 [13.0–19.0]

1.0 [0.4–2.3]

2.1 [1.1–3.6]

6.2 [4.5–8.5]

 26–35 (n = 873)

20.4 [17.7–23.1]

20.8 [18.1–23.5]

0.7 [0.3–1.2]

1.9 [1.0–2.8]

6.8 [5.3–8.6]

 36–45 (n = 452)

18.1 [14.6–21.7]

23.9 [20.0–27.8]

0.9 [0.3–2.3]

2.2 [0.9–3.6]

8.2 [6.0–11.1]

 46–55 (n = 325)

19.4 [15.1–23.7]

19.1 [14.8–23.4]

1.5 [0.6–3.7]

5.2 [3.2–8.3]

8.6 [6.0–12.2]

 56–65 (n = 152)

14.5 [8.9–20.1]

31.6 [24.2–39.0]

1.3 [0.1–5.0]

2.6 [0.8–6.8]

6.6 [3.5–11.8]

 Rural (n = 1,789)

18.6 [16.8–20.4]

24.4 [22.4–26.4]

0.4 [0.2–0.8]

2.7 [2.0–3.6]

6.7 [5.6–7.9]

 Urban (n = 596)

20.0 [16.8–23.2]

9.4 [7.1–11.7]

2.4 [1.4–3.9]

3.2 [2.0–5.0]

8.6 [6.6–11.1]

Adjusted for gender, age and habitation

17.7%

20.6%

0.7%

2.5%

6.4%