Table 3—

Risk of acute pancreatitis by BMI class (left 3 columns) and severity* of pancreatitis by BMI class (right 8 columns)

Crude OR of BMI
Length of hospitalization among cases (days)
≤7
>7≤14
>14 or ICC
RR >14 days/or ICU versus ≤14
BMIOR (95% CI)Control subjects (n)Case subjects (n)N%N%N%RR95% CI
<202 (0.7–2.2)124302686.626.626.60.970.23–4.06
≥20<25Reference91920414370.04723.0147.0Reference
≥25<301.3 (1.0–1.6)58117111064.34526.3169.41.360.69–2.71
≥301.8 (1.3–2.6)130533668.0815.0917.02.471.13–5.40
Unknown274310NA
Total1,78146231810341
  • RR, relative risk; NA, not analyzed.

  • *

    * Length of hospital stay or treatment in ICU were used as proxy variables for severity.