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Table 3 Parameters and procedures during bronchoscopy

From: Association between oxygen saturation level during bronchoscopy and post-bronchoscopy adverse events: a retrospective cohort study

  Total population Propensity score-matched population
High oxygen saturation group (n = 458) Low oxygen saturation group (n = 111) P-value High oxygen saturation group (n = 222) Low oxygen saturation group (n = 111) P-value
Oxygen saturation during bronchoscopy
 Initial SpO2, mean (± SD) 98.9 (1.5) 96.9 (2.9)  < 0.001 98.8 (1.6) 96.9 (2.9)  < 0.001
 Highest SpO2, mean (± SD) 99.1 (1.3) 94.9 (2.4)  < 0.001 99.0 (1.4) 94.9 (2.4)  < 0.001
 Lowest SpO2, mean (± SD) 95.4 (5.2) 87.0 (5.8)  < 0.001 94.8 (5.8) 87.0 (5.8)  < 0.001
 Desaturation event, n (%) 87 (19.0) 82 (73.9)  < 0.001 46 (20.7) 82 (73.9)  < 0.001
 Desaturation duration > 1 min, n, (%) 0 (0.0) 12 (10.8)  < 0.001 0 (0.0) 12 (10.8)  < 0.001
Duration of bronchoscopy in min, median (IQR) 6.0 (5.0–7.0) 6.0 (5.0–12.0) 0.007 6.0 (5.0–8.0) 6.0 (5.0–12.0) 0.137
Duration of desaturation in min, median (IQR) 0 (0–0) 1.0 (0–1.0)  < 0.001 0 (0–0) 1.0 (0–1.0))  < 0.001
Sedation, n (%) 128 (27.9) 49 (44.1) 0.001 97 (43.7) 49 (44.1) 1.000
Procedure type, n (%)       
 Bronchial washing 306 (66.8) 65 (58.6) 0.127 142 (64.0) 65 (58.6) 0.402
 Toileting 109 (23.8) 24 (21.6) 0.718 52 (23.4) 24 (21.6) 0.817
 Bronchoalveolar lavage 29 (6.3) 14 (12.6) 0.041 15 (6.8) 14 (12.6) 0.114
 Biopsy 46 (10.0) 10 (9.0) 0.880 21 (9.5) 10 (9.0) 1.000
 EBUS-TBNA 37 (8.1) 18 (16.2) 0.015 24 (10.8) 18 (16.2) 0.220
 TBLB 1 (0.2) 1 (0.9) 0.844 0 (0.0) 1 (0.9) 0.723
 Foreign body removal 15 (3.3) 2 (1.8) 0.612 8 (3.6) 2 (1.8) 0.570
Bronchoscopist    0.311    0.371
 Attending physician alone 221 (48.3) 47 (42.3)   107 (48.2) 47 (42.3)  
 Fellow physician, supervised by attending physician 237 (51.7) 64 (57.7)   115 (51.8) 64 (57.7)  
  1. Data are expressed as mean (± standard deviation) or median (interquartile range) and number (percentage)
  2. EBUS-TBNA endobronchial ultrasound-guided transbronchial needle aspiration; TBLB transbronchial lung biopsy; SD standard deviation; IQR interquartile range