Maarten van Egmond

31 Preoperative functional status and postoperative complications 2 Table 4. Univariate andmultivariate stepwise backward logistic regression analysis for associations of conventional risk factors and indicators of preoperative functional status with POC Univariate analysis Multivariate analysis Odds Ratio P -value † Odds Ratio P -value Conventional risk factors Gender 0.57 (0.20 1.59) .280 ASA-classification II vs. I 0.43 (0.14, 1.29) .132 0.49 (0.16, 1.56) .226 III vs. I 0.66 (0.17, 2.59) .550 Age 1.02 (0.97, 1.06) .507 BMI 0.95 (0.85, 1.05) .318 DM II 1.45 (0.33, 6.45) .626 Cardiovascular disease 0.80 (0.31, 2.01) .628 COPD 1.78 (0.42, 7.58) .437 Smoking 2.88 (0.94, 8.79) .064 3.11 (0.91, 10.65) .071 Pulmonary function (percentage of predicted) FVC 1.00 (0.98, 1.03) .886 FEV 1 0.99 (0.97, 1.02) .620 IVC 1.00 (0.97, 1.02) .712 Type of surgery Transthoracal open versus transhiatal open 5.33 (0.34, 82,83) .232 Transhiatal scopic versus transhiatal open 1.33 (0.09, 20.11) .835 Transthoracal scopic versus transhiatal open 2.71 (0.23, 31.44) .424 Indicators of functional status MIP (% pred) 1.00 (0.99, 1.01) .779 HGS dom (% pred) 0.99 (0.97, 1.01) .250 Physical activities (kcal/day) 1.00 (1.00, 1.01) .162 1.00 (1.00, 1.01) .174 HRQL 1.02 (0.99, 1.05) .222 Values in parentheses are 95% confidence intervals. ASA, American Society of Anesthesiologists; BMI, body mass index; DM II, diabetes mellitus type 2; FVC, functional vital capacity; FEV1, forced expiratory volume in the first second of expiration; IVC, inspiratory vital capacity; MIP, maximal inspiratory pressure; HGS, handgrip strength; HRQL, health-related quality of life; †All variables with a P -value < .200 in univariate analysis were entered in a multivariate model.