Retrospective Cohort Study
Copyright ©The Author(s) 2018.
World J Gastroenterol. Feb 21, 2018; 24(7): 844-851
Published online Feb 21, 2018. doi: 10.3748/wjg.v24.i7.844
Table 4 Univariate and multivariate Cox proportional hazards models for severe postoperative complications (grades IIIb-V)
VariableSubgroupUnivariate
Multivariate
P valueP valueHR (95%CI)
Medical risk factors
Age in yr< 65 vs ≥ 650.0020.0101.63 (1.18-6.30)
BMI< 24 kg/m2vs ≥ 24 kg/m20.0120.0411.20 (1.07-5.89)
ASA classificationI/II vs III/IV0.0380.271-
Surgical risk factors
PancreaticoduodenectomyYes vs No< 0.0010.0174.86 (1.20-8.31)
Length of operation< 241 min vs ≥ 241 min (median)0.0040.0122.97 (1.04-6.14)