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Table 1 Baseline demographic data

From: Perioperative adherence to continuous positive airway pressure and its effect on postoperative nocturnal hypoxemia in obstructive sleep apnea patients: a prospective cohort study

Characteristics

Adherent

(N = 76)

Non-adherent

(N = 56)

P Value

Age (years)

51 ± 11

51 ± 15

0.818

Sex

  

0.280

 Male

23 (30.3%)

22 (39.3%)

 

 Female

53 (69.7%)

34 (60.7%)

 

BMI (kg/m2)

47 ± 10

43 ± 11

0.017

ASA Physical Status

  

0.594

 2

4 (5.3%)

6 (10.7%)

 

 3

68 (89.5%)

48 (85.7%)

 

 4

4 (5.3%)

2 (3.6%)

 

Medical History

 Cardiovascular Diseasea

40 (52.6%)

30 (53.6%)

0.915

 Diabetes

24 (31.6%)

21 (37.5%)

0.478

 GERD

34 (44.7%)

23 (41.1%)

0.674

 Smoker

29 (38.2%)

15 (26.8%)

0.171

 Asthma/COPD

19 (25.0%)

13 (23.2%)

0.813

 Hypothyroidism

10 (13.2%)

8 (14.3%)

0.852

 Arthritis

33 (43.4%)

21 (37.5%)

0.494

AHIb, (events/h)

36.1 (22.7, 74.0)

24.4 (16.2, 38.7)

0.031

OSA Severity

  

0.051

 Mild

9 (14.5%)

11 (25.6%)

 

 Moderate

18 (29.0%)

18 (41.9%)

 

 Severe

35 (56.5%)

14 (32.6%)

 

Type of Surgery

  

0.081

 General

8 (10.5%)

6 (10.7%)

 

 Bariatric

54 (71.1%)

29 (51.8%)

 

 Orthopedic

5 (6.6%)

8 (14.3%)

 

 Spine

8 (10.5%)

11 (19.6%)

 

 Urology

1 (1.3%)

 

 Brain

2 (3.6%)

 

Type of Anesthesia

  

0.441

 General

59 (95.2%)

39 (90.7%)

 

 Spinal/Regional

3 (4.8%)

4 (9.3%)

 

48 h opioid consumption (mg) c

145.0 (90.0, 195.0)

105.6 (61.0, 186.3)

0.456

Supplemental Oxygen Therapy

 Postoperative Night 1

6/61 (9.8%)

20/43 (46.5%)

<.001

 Postoperative Night 2

1/59 (1.7%)

2/42 (4.8%)

0.569

  1. Data are represented as mean ± SD or median (IQR), or as otherwise indicated. OSA severity defined as mild (5 ≤ AHI < 15), moderate (15 ≤ AHI < 30), or severe (AHI ≥ 30) aCardiovascular disease includes hypertension, angina, myocardial infraction, heart failure, peripheral vascular disease, valvular disease, stroke, coronary revascularization, atrial fibrillation, ventricular tachycardia, supraventricular tachycardia, ventricular premature beats, atrioventricular block, and cardiomyopathy. bBaseline AHI prior to CPAP therapy. bOpioid consumption was reported as oral morphine equivalents (mg). ASA American Society of Anesthesiologists; BMI body mass index; COPD chronic obstructive pulmonary disease. CPAP continuous positivity airway pressure; GERD gastroesophageal reflux disease. IQR interquartile range. Two sample independent t-tests or Wilcoxon rank-sum test and chi-squared test, or Fisher’s exact tests were conducted to examine differences in baseline characteristics between adherent and non-adherent patients. Adherence is defined as an average CPAP use ≥4 h/night