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Table 1 Comparison of patient and case characteristics in the Post-Anesthesia Care Unit (PACU) between desaturation and no-desaturation groups. Data are expressed as median (q1-q3)

From: Post-anesthesia care unit desaturation in adult deep extubation patients

Characteristics Total (n = 300) PACU Desaturations P-value
Yes (n = 13, 4.3%) No (n = 287, 95.7%)
Age, median (q1–q3) 50.0 (31.0–61.5) 38.0 (29.0–55.0) 50.0 (31.5–62.0) 0.1569
Male, n (%) 139 (46.3%) 6 (46.15) 133 (46.34) 0.9894
Body mass index in kg/m2, median (q1-q3) 26.4 (23.1–29.8) 28.0 (25.3–32.7) 25.9 (23.0–29.8) 0.1755
Surgery class
 Ear 53 (17.7) 3 (23.08) 50 (17.42) 0.0890
 Eye 15 (5.0) 0 (0.0) 15 (5.23)  
 Neck 50 (16.7) 0 (0.0) 50 (17.42)  
 Nose 87 (29.0) 8 (61.54) 79 (27.53)  
 Throat 73 (24.3) 1 (7.69) 72 (25.09)  
 Thyroid 22 (7.3) 1 (7.69) 21 (7.32)  
ASA
 1 65 (21.7) 4 (30.77) 61 (21.25) 0.7288
 2 208 (69.3) 8 (61.54) 200 (69.69)  
 3 27 (9.0) 1 (7.69) 26 (9.06)  
Mallampati's class (n = 295)
 1 114 (38.6) 4 (30.77) 110 (39.01) 0.7576
 2 142 (48.1) 8 (61.54) 134 (47.52)  
 3 36 (12.2) 1 (7.69) 35 (12.41)  
 4 3 (1.0) 0 (0.0) 3 (1.06)  
  1 (0.3) 0 (0.0) 1 (0.35) 1.0000
Respiratory tract pathology history
 None 179 (59.7) 3 (23.08) 176 (61.32) 0.0082*
 Asthma 57 (19.0) 6 (46.15) 51 (17.77) 0.0210*
 Chronic cough 1 (0.3) 0 (0.0) 1 (0.35) 1.0000
 OSA 29 (9.7) 2 (15.38) 27 (9.41) 0.3636
 Snoring 33 (11.0) 2 (15.38) 31 (10.80) 0.6422
 Recent respiratory tract infection within past 4 weeks 2 (0.7) 1 (7.69) 1 (0.35) 0.0849
 COPD 10 (3.3) 2 (15.38) 8 (2.79) 0.0642
 Current smoker 26 (8.7) 2 (15.38) 24 (8.36) 0.3129
Cormack and Lehane's grade (n = 298)
 1 245 (82.2) 11 (84.62) 234 (82.11) 1.0000
 2 48 (16.1) 2 (15.38) 46 (16.14)  
 3 4 (1.3) 0 (0.0) 4 (1.40)  
 4 1 (0.3) 0 (0.0) 1 (0.35)  
 Difficulty intubation 0 (0.0) 0 (0.0) 0 (0.0)  
Comorbidity
 None 220 (73.3) 9 (69.23) 211 (73.52) 0.7516
 Diabetes 25 (8.3) 1 (7.69) 24 (8.36) 1.0000
 GI obstruction 0 (0.0) 0 (0.0) 0 (0.0)  
 Hiatal Hernia 2 (0.7) 0 (0.0) 2 (0.70) 1.0000
 GERD 63 (21.0) 4 (30.77) 59 (20.56) 0.4830
Laryngoscopy device used
 Glidescope 51 (17.0) 2 (15.38) 49 (17.07) 1.0000
 MAC 236 (78.7) 11 (84.62) 225 (78.40) 0.7421
 Miller 12 (4.0) 0 (0.0) 12 (4.18) 1.0000
 Other 0 (0.0) 0 (0.0) 0 (0.0)  
Number of direct laryngoscopy attempts (n = 293)
 1 277 (94.5) 13 (100.00) 264 (94.29) 1.0000
 2 13 (4.4) 0 (0.0) 13 (4.64)  
 3 3 (1.0) 0 (0.0) 3 (1.07)  
 Phase 1 PACU in min, median (q1–q3), n = 269 70 (58–88) 75 (59–118) 70 (58–87) 0.3253
 Phase 2 PACU in min, median (q1–q3), n = 222 74 (58–101) 59.0 (48.3–101.0) 74.5 (58.3–100.8) 0.3549
  1. * Statistical significance with P-value < 0.05