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Table 1 Baseline demographic and clinical characteristics of the patient cohort

From: Perioperative evaluation of respiratory impedance using the forced oscillation technique: a prospective observational study

Preoperative parameter N = 26
Male 23 (88.5 %)
Age (years) 68 (55 to 74)
Height (cm) 163.5 (160.6 to 168.9)
Weight (kg) 62.1 (56.8 to 69.1)
Body mass index (kg/m2) 23.7 (21.0 to 25.8)
Body surface area (m2) 1.7 (1.6 to 1.7)
Non-smoker 4 (15.4 %)
Smoker 5 (19.2 %)
Ex-smoker 17 (65.4 %)
Brinkman index 630 (300 to 1105)
VC (L) 3.1 (2.8 to 3.8)
%VC (% predicted) 101.4 (87.2 to 112.5)
FVC (L) 3.0 (2.7 to 3.8)
%FVC (% predicted) 98 (86.8 to 111.5)
FEV1.0 (L) 2.3 (1.7 to 2.7)
%FEV1.0 (% predicted) 74.3 (67.6 to 80.4)
FEV1.0/FVC ratio (%) 74.3 (67.6 to 80.4)
Anesthetic time (min) 89 (73 to 99)
Operating time (min) 47 (35 to 56)
Intravenous fluid volume (ml) 650 (588 to 700)
  1. Data are expressed as median (interquartile range) or as number (percent). Brinkman index, defined as the number of cigarettes smoked per day multiplied by smoking years, was calculated in smokers and ex-smokers only. Preoperative spirometry data were measured within 1 week before surgery
  2. Abbreviations: VC vital capacity, FVC forced vital capacity, FEV1.0 forced expiratory volume in the first second