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Table 4 Univariate and multivariate Cox regression models predicting prolonged extubation time

From: Longer time to extubation after general anesthesia with desflurane in patients with obstructive respiratory dysfunction: a retrospective study

  Univariate Multivariate
OR (95% CI) P value OR (95% CI) P value
Sex, male vs female 2.00 (1.12–3.57) 0.020* 1.96 (1.09–3.53) 0.024*
Age ≥ 75 yr 1.28 (0.72–2.27) 0.404   
BMI ≥ 25 kg/m2 0.87 (0.48–1.56) 0.641   
ASA, III vs I, II 1.68 (0.80–3.52) 0.172   
Current smoker vs ex-smoker, nonsmoker 1.00 (0.39–2.54) 0.998   
Operation time ≥ 100 min 0.97 (0.55–1.73) 0.925   
Anesthesia time ≥ 160 min 1.52 (0.84–2.75) 0.162   
Fentanyl ≥ 250 μg 1.03 (0.58–1.83) 0.925   
Maintenance concentration of DES ≥ 4.5 % 1.16 (0.65–2.10) 0.614   
Age-adjusted MAC fraction ≥ 1.0 1.04 (0.52–2.07) 0.907   
Obstructive respiratory impairment, yes vs no 2.07 (1.05–4.08) 0.036* 2.02 (1.02–4.02) 0.045*
  1. OR odds ratio, CI confidence interval, BMI body mass index, ASA American Society of Anesthesiologists, DES, desflurane, MAC minimum alveolar concentration
  2. *P < 0.05