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Table 2 Crude (observed) 1-year prevalences (% [95% CIs]) of all headache and each headache type, overall and according to demographic variables, and gender- and age-adjusted prevalences (N = 4266)

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

  All headache (n = 2617) Migraine (n = 1195) TTH (n = 719) pMOH (n = 30) Other headache on ≥ 15 d/m (n = 157) UdH (n = 290)
Observed prevalences (% [95% CI])
 Overall (N = 4266) 61.3 [59.8–62.8] 28.0 [26.7–29.4] 16.9 [15.8–18.0] 0.7 [0.5–1.0] 3.7 [3.1–4.3] 6.8 [6.0–7.6]
 Gender
  male (n = 2107 56.1 [54.0–58.2] 24.8 [23.0–26.6] 15.8 [14.2–17.4] 0.5 [0.2–0.8] 2.5 [1.8–3.2] 7.0 [5.9–8.1]
  female (n = 2159) 66.5 [64.5–68.5] 31.1 [29.2–33.1] 17.9 [16.3–19.5] 0.9 [0.5–1.3] 4.8 [3.9–5.7] 6.6 [5.6–7.7]
 Age group (years)
  6–11 (n = 2241) 43.8 [41.8–45.9] 22.0 [20.3–23.7] 10.1 [8.9–11.4] 0.6 [0.3–0.9] 1.7 [1.2–2.2] 5.7 [4.7–6.7]
  12–17 (n = 2025) 80.7 [79.0–82.4] 34.6 [32.5–36.7] 24.3 [22.4–26.2] 0.8 [0.4–1.2] 5.9 [4.9–6.9] 8.0 (6.8–9.1]
 Pupils’ home income*
  “higher” (n = 1378) 62.8 [60.3–65.4] 25.2 [22.9–27.5] 19.2 [17.1–21.3] 0.5 [0.1–0.9] 3.6 [2.6–4.6] 8.1 [6.7–9.5]
  “middle” (n = 2015) 60.1 [58.0–62.2] 28.8 [26.8–30.8] 15.8 [14.2–17.4] 0.7 [0.3–1.1] 3.8 [3.0–4.6] 6.2 [5.2–7.3]
  “lower” (n = 873) 61.7 [58.5–64.9] 30.6 [27.5–33.7] 15.6 [13.2–18.0] 0.9 [0.3–1.5] 3.7 [2.5–5.0] 6.3 [4.7–7.9]
 School locality
  urban (n = 1831) 61.2 [59.0–63.4] 27.9 [25.9–30.0] 16.3 [14.6–18.0] 0.6 [0.3–1.0] 4.7 [3.7–5.7] 6.2 [5.1–7.3]
  semi-rural (n = 873) 61.7 [58.5–64.9] 30.6 [27.5–33.7] 15.6 [13.2–18.0] 0.9 [0.3–1.5] 3.7 [2.5–5.0] 6.3 [4.7–7.9]
  rural (n = 1562) 61.3 [58.9–63.7] 26.7 [24.5–28.9] 18.2 [16.3–20.1] 0.7 [0.3–1.1] 2.5 [1.7–3.3] 7.7 [6.4–9.0]
 Home proximity*
  “mostly close” (n = 2519) 60.7 [58.8–62.6] 28.0 [26.3–29.8] 16.8 [15.3–18.3] 0.7 [0.4–1.0] 3.4 [2.7–4.1] 6.7 [5.6–7.8]
  “many distant” (n = 1747) 62.2 [59.9–64.5] 28.0 [25.9–30.1] 17.0 [15.2–18.8] 0.7 [0.3–1.1] 4.1 [3.2–5.0] 7.0 [5.8–8.2]
Gender- and age-adjusted prevalences (% [95% CI])
 Overall (N = 4266) 59.4 [57.9–60.9] 27.3 [26.0–28.6] 16.1 [15.0–17.2] 0.7 [0.5–1.0] 3.5 [3.0–4.1] 6.6 [5.9–7.4]
  1. CI confidence interval, TTH tension-type headache, pMOH probable medication-overuse headache, d/m days/month, UdH undifferentiated headache; *see text or Table 1 for explanation. Odds ratios for associations with demographic variables are in Table 4, and adjusted odds ratios in Table 5