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Table 2 1 year migraine prevalence and adjusted odds ratios (AOR) for BMI categories

From: Body mass index and migraine: a survey of the Chinese adult population

BMI N Prevalence n (%) AOR (95 % CI) p
Normal 2,469 212 (8.6 %) Reference  
Underweight 262 27 (10.3 %) 1.22 (0.80–1.87) 0.359
Overweight 1,064 100 (9.4 %) 1.08 (0.84–1.39) 0.541
Obese 1,044 96 (9.2 %) 1.04 (0.80–1.34) 0.795
Morbidly obese 190 32 (16.8 %) 2.10 (1.39–3.15) 0.000
Total 5,029 467 (9.3 %)   
  1. Overall χ2 = 14.661
  2. p = 0.005