Table 3 Bivariate analyses of associations of headache types with demographic variables (N = 4266)

 male (n = 2107)

reference

reference

reference

reference

 female (n = 2159)

1.4 [1.2–1.6]³

1.2 [0.99–1.4]

2.0 [1.45–2.7]³

0.95 [0.75–1.2]

 6–11 (n = 2241)

reference

reference

reference

reference

 12–17 (n = 2025)

1.9 [1.6–2.1]³

2.9 [2.4–3.4]³

3.0 [2.2–4.2]³

1.5 [1.15–1.9]²

 “higher” (n = 1378)

0.8 [0.6–0.9]²

1.3 [1.03–1.6]¹

0.9 [0.6–1.3]

1.3 [0.9–1.8]

 “middle” (n = 2015)

0.9 [0.8–1.1]

1.0 [0.8–1.3]

1.0 [0.7–1.4]

1.0 [0.7–1.35]

 “lower” (n = 873)

reference

reference

reference

reference

 urban (n = 1831)

1.0 [0.9–1.1]

0.9 [0.8–1.1]

1.5 [1.1–2.0]¹

0.85 [0.7–1.1]

 semi-rural or rural (n = 2435)

reference

reference

reference

reference