Table 2

Characteristics of subjects with PSIs

CardiopulmonaryOtherp†
N9126
 Gender, female/male49/4210/160.19
 Age (years)‡49 (28)58 (20)<0.01*
 Body mass index (kg/m2)‡26.9 (9.5)25.0 (7.8)0.3
 Current or ex-smokers/never-smokers32/5511/120.2
Pulmonary function
 TLCOc % predicted‡76.5 (30.5)55.9 (55.8)0.02*
 FEV1 % predicted‡86.1 (24.7)68.8 (39.5)<0.01*
 FVC % predicted‡94.4 (23.3)87.5 (38.1)0.02*
 FEV1/FVC‡75 (19)71 (31)0.4
 Resting SaO296 (3)97 (2)0.3
 Resting PaO2‡, kPa10.9 (2.5)11.9 (2.7)0.3
 Resting PaCO2‡, kPa5.0 (0.9)5.0 (0.9)0.6
  • Not all subjects/incidents had all values available.

  • *p<0.05.

  • †Mann-Whitney U test for continuous variables, and χ2 or Fisher’s exact as appropriate for categorical variables.

  • ‡Reported numbers are median (IQR).

  • PSI, patient safety incident; TLCOc, transfer factor for carbon monoxide when corrected for haemoglobin.