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

From: The prevalence of headache disorders in children and adolescents in Mongolia: a nationwide schools-based study

Variable Migraine Tension-type headache All headache on ≥ 15 d/m Undifferentiated headache
Odds ratio [95% CI]
Gender
 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]
Age group (years)
 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
Pupils’ home-income*
 “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
School locality
 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
  1. d/m days/month; *see text for explanation; significant values are emboldened (1p < 0.05; 2p < 0.01; 3p < 0.001)