Table 2.

Recurrent headache in relation to exposure to PTIEs and psychological distress, by sex*†‡

Variables	n	Recurrent headache (n=1514)
		Female (n=1021)		Male (n=496)
		Model 1	Model 2	Model 1	Model 2
		OR1 (CI)	OR2 (CI)	OR1 (CI)	OR2 (CI)
Sum of PTIEs
0	4789	1 (Reference)	1 (Reference)	1 (Reference)	1 (Reference)
1	1250	1.46 (1.20 to 1.78)	1.25 (1.02 to 1.53)	1.04 (0.81 to 1.34)	0.93 (0.72 to 1.20)
2	496	2.28 (1.69 to 3.08)	1.73 (1.27 to 2.36)	1.71 (1.25 to 2.33)	1.41 (1.03 to 1.94)
≥3	252	2.61 (1.82 to 3.75)	1.69 (1.15 to 2.47)	2.29 (1.49 to 3.52)	1.57 (1.00 to 2.47)
Overall p value		<0.001	<0.001	<0.001	0.029
Psychological distress	6787		1.94 (1.70 to 2.22)		2.10 (1.72 to 2.58)

*Study definitions and measures are explained in footnotes to table 1.

†Analyses are restricted to adolescents no missing values for all included variables (3494 females and 3293 males).

‡Both regression models are adjusted for age, family structure and family economy. Model 2 is additionally adjusted for psychological distress.

OR₁ and OR₂, OR for regression models 1 and 2, respectively; PTIE, potentially traumatic interpersonal event.