Table 4.

Multivariate logistic regression analyses of headache type versus demographic variables (N = 2505)

Variable	Migraine	TTH	pMOH	Other headache on ≥ 15 d/m	UdH
	Adjusted odds ratio [95% CI]*
Gender
male (n = 1169)	reference	reference	reference	reference	reference
female (n = 1336)	1.25 [1.03–1.5]1	1.2 [0.97–1.4]	6.8 [1.6–28.9]1	2.8 [1.6–4.9]1	0.99 [0.8–1.2]
Age group (years)
7–11 (n = 1382)	reference	reference	reference	reference	reference
12–17 (n = 1123)	1.5 [1.2–1.9]2	2.25 [1.85–2.75]2	5.0 [1.4–17.7]1	3.5 [2.0–6.2]2	0.99 [0.8–1.2]
School income category*
high (n = 1828)	0.8 [0.5–1.2]	1.1 [0.7–1.75]	0.3 [0.03–3.6]	1.3 [0.3–6.1]	1.1 [0.7–1.7]
middle or low (n = 677)	reference	reference	reference	reference	reference
School locality
urban (n = 1660)	reference	reference	reference	reference	reference
semi-rural (n = 336)	0.9 [0.7–1.2]	0.9 [0.65–1.2]	0.9 [0.2–3.3]	1.5 [0.8–2.8]	1.2 [0.9–1.6]
rural (n = 509)	0.6 [0.36–0.96]1	0.9 [0.5–1.4]	0.4 [0.03–5.0]	1.4 [0.3–7.3]	1.7 [1.06–2.7]1

TTH tension-type headache, pMOH probable medication-overuse headache, d/m days/month, UdH undifferentiated headache, CI confidence interval; * see text or Table 1 for explanation; significant values are emboldened: ¹p < 0.05; ²p < 0.001