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

Table 5

Multiple logistic regression analysis of the CM group.

Variable	p value	OR	95% CI for OR
Age	0.46	1.02	0.98–1.05
Marriage	0.90	0.92	0.22–3.74
Education level	0.71	0.89	0.5–1.61
Elevated blood pressure	0.76	0.86	0.31–2.37
Medication overuse	<0.001	0.01	0.001–0.035
Average headache days per month	<0.001	1.27	1.21–1.33
Duration of headache history	0.54	0.99	0.95–1.03
BMI classification	0.005
Compared with normal weight
Underweight	0.699	0.71	0.12–4.14
Overweight	0.021	3.24	1.19–8.81
Obese	0.004	28.63	2.96–276.6

CM: chronic migraine; OR: odds ratio; CI: confidence interval; BMI: body mass index.