Skip to main content

Advertisement

Table 1 Independent predictors of risk for PPCs identified in the logistic regression model (ARISCAT score)

From: Intraoperative immunomodulatory effects of sevoflurane versus total intravenous anesthesia with propofol in bariatric surgery (the OBESITA trial): study protocol for a randomized controlled pilot trial

  Multivariate analysis OR (95% CI) n = 1.624* β Risk scorea
Age, years
  ≤ 50 1   
 51–80 1.4 (0.6–3.3) 0.331 3
  > 80 5.1 (1.9–13.3) 1.619 16
Preoperative SpO2, %
  ≥ 96 1   
 91–95 2.2 (1.2–4.2) 0.802 8
  ≤ 90 10.7 (4.1–28.1) 2.375 24
RTI in preceding month 5.5 (2.6–11.5) 1.698 17
Preoperative anemia (Hb ≤ 10 g/dL) 3.0 (1.4–6.5) 1.105 11
Surgical incision
 Peripheral 1   
 Upper abdomen 4.4 (2.3–8.5) 1.480 15
 Intrathoracic 11.4 (4.9–26.0) 2.431 24
Duration of surgery, hours
  ≤ 2 1   
  > 2–3 4.9 (2.4–10.1) 1.593 16
  > 3 9.7 (4.7–19.9) 2.268 23
Emergency procedure 2.2 (1.0–4.5) 0.768 8
  1. Three patients were excluded because of a missing value for some variables. Logistic regression model constructed with the development subsample, c-index = 0.90; Hosmer-Lemeshow chi-square test = 7.862; P = 0.447
  2. CI confidence interval, Hb hemoglobin, OR odds ratio, PPC postoperative pulmonary complications, RTI respiratory tract infection, SpO2 oxyhemoglobin saturation by pulse oximetry (breathing room air in the supine position)
  3. aSimplified risk score was the sum of each logistic regression coefficient (β) multiplied by 10, after rounding off