Association between Body Mass Index and Migraine: A Survey of Adult Population in China

Table 6

There was no association between the duration of headache attacks and BMI in CM.

Weight category	<4 h		4–72 h		>72 h
	n	(%)	n	(%)	n	(%)
Underweight ()	4		5		4		0.2415
Normal ()	21		60		12		0.1025
Overweight ()	8		12		3		0.0529
Obese/morbidly obese ()	1		2		2		0.2076