eTable 5. Severe postoperative pulmonary complications Increased risk of Relative Risk P value Variable All patients Low risk of PPCs PPCs (95% CI) Postoperative pulmonary complications Total PPCs# 10.4 (1004/9697) 7.0 (467/6675) 19.2 (505/2632) 3.16 (2.76 3.61) – < 0.001 Total severe PPCs## 2.8 (270/9697) 1.6 (104/6675) 14.5 (156/2632) 3.98 (3.09 5.12) – < 0.001 All data is presented as proportion, % (n/N); Comparison of differences within a subgroup is performed by using the t-test for continuous variables and Chi-square for categorical variables; CI: confidence interval; Low versus increased risk of PPCs, according to the Assess Respiratory Risk in Surgical Patients in Catalonia risk (ARISCAT) score (< versus 26, respectively); PPCs: Postoperative pulmonary complications; #Total PPCs: one ≥ patient could present with multiple PPCs, but was scored only once (YES or NO principle); ##Total severe PPCs: same composite as total PPCs, without unplanned supplemental O2
eTable 5. Severe postoperative pulmonary complications Variable All patients Low risk of PPCs Increased risk of PPCs Relative Risk (95% CI) P value Postoperative pulmonary complications Total PPCs# 10.4 (1004/9697) 7.0 (467/6675) 19.2 (505/2632) 3.16 (2.76 – 3.61) < 0.001 Total severe PPCs## 2.8 (270/9697) 1.6 (104/6675) 14.5 (156/2632) 3.98 (3.09 – 5.12) < 0.001 All data is presented as proportion, % (n/N); Comparison of differences within a subgroup is performed by using the t-test for continuous variables and Chi-square for categorical variables; CI: confidence interval; Low versus increased risk of PPCs, according to the Assess Respiratory Risk in Surgical Patients in Catalonia risk (ARISCAT) score (< versus ≥ 26, respectively); PPCs: Postoperative pulmonary complications; #Total PPCs: one patient could present with multiple PPCs, but was scored only once (YES or NO principle); ##Total severe PPCs: same composite as total PPCs, without unplanned supplemental O2