Table 2.

Association between obesity and headache

	No headache N	Migraine OR (95% CI) N	Tension-type headache OR (95% CI) N
Obesity (BMI)a
Underweight	121	1.17 (0.78–1.74) 38	0.83 (0.53–1.31) 24
Normal weight	7519	1.0 (Ref.) 1455	1.0 (Ref.) 1469
Overweight	11,289	1.19*** (1.10–1.29) 1710	1.11** (1.03–1.20) 1893
Obese	5424	1.45*** (1.32–1.59) 1071	1.26*** (1.15–1.38) 1054
Abdominal obesity (WC)b
Normal weight	6633	1.0 (Ref.) 1090	1.0 (Ref.) 1141
Abdominal overweight	7638	1.16** (1.05–1.27) 1232	1.20*** (1.09–1.31) 1367
Abdominal obesity	10,066	1.29*** (1.18–1.41) 1935	1.27*** (1.17–1.39) 1925

**p < 0.01; ***p < 0.001

^aUnderweight (BMI < 18.5), normal weight (18.5 ≤ BMI < 25), overweight (25 ≤ BMI < 30), obese (BMI ≥ 30)

^bNormal weight (WC for women < 80 cm, for men < 94 cm), abdominal overweight (women 80–88 cm, men 94–102 cm), abdominal obesity (women > 88 cm, men > 102)

OR odds ratio, CI confidence intervals, Ref. reference category, BMI body mass index, WC waist circumference

The analyses are adjusted for age, sex, smoking, depression (HADS-D) and presence of diabetes