Body Mass Index and Primary Headache: A Hospital-Based Study in China

Table 4

Distribution of patients with abnormal and normal BMI in the three headache groups: migraine, TTH, and other headache groups.

(a) Migraine

Variable	EM (n = 369)	CM (n =177)	p value
Compared with normal BMI
Underweight	35 (10.8%)	9 (7.5%)	0.198
Overweight	41 (12.4%)	52 (31.9%)	<0.001
Obese	4 (1.4%)	5 (4.3%)	0.078

(b) TTH

Variable	ETTH (n = 319)	CTTH (n = 186)	p value
Compared with normal BMI
Underweight	20 (8.1%)	16 (10.2%)	0.296
Overweight	81 (26.4%)	30 (17.5%)	0.018
Obese	4 (1.7%)	5 (3.4%)	0.24

EM: episodic headache; CM: chronic headache; ETTH: episodic tension-type headache; CTTH: chronic tension-type headache.