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Table 1 Comparison of baseline characteristics of enrolled patients grouped by comorbid OSA

From: Is obstructive sleep apnoea associated with hypoxaemia and prolonged ICU stay after type A aortic dissection repair? A retrospective study in Chinese population

Variable Total (n = 83) Obstructive sleep apnoea p value
Yes (n = 41) No (n = 42)
Male gender 66 (79.5) 32 (78.0) 34 (81.0) 0.743
Age (y) 47.7 ± 10.8 50.3 ± 9.7 45.1 ± 11.4 0.023
Body mass index (kg/m2) 25.8 ± 3.8 26.7 ± 3.6 24.9 ± 3.9 0.035
STOP-BANG score 5.0 (4.0, 6.0) 5.0 (4.0, 6.5) 3.0 (2.0, 4.0) 0.001
STOP-BANG score ≥ 4 53 (63.9) 35 (85.4) 18 (42.9) < 0.001
Epworth sleepiness scale 7.0 (4.0, 12.0) 10.0 (5.0, 12.0) 4.5 (3.0, 9.8) 0.004
Apnoea hypopnea index (events/h) 13.8 (5.8, 30.2) 30.2 (20.5, 48.3) 5.9 (3.0, 9.4) < 0.001
Oxygen desaturation index (events/h) 14.3 (5.5, 26.9) 26.0 (19.8, 46.3) 5.9 (2.5, 8.9) < 0.001
MinSaO2 (%) 78.7 ± 11.1 74.4 ± 11.3 82.9 ± 9.2 0.001
MeanSaO2 (%) 93.9 ± 2.4 93.1 ± 2.3 94.7 ± 2.2 0.005
T90SaO2 (%) 2.0 (0.2, 7.4) 5.2 (1.3, 18.3) 0.35 (0, 2.7) < 0.001
Marfan syndrome 9 (10.8) 2 (4.9) 7 (21.8) 0.156
Family history of aortic disease 10 (12.0) 4 (9.8) 6 (14.3) 0.738
Uncontrolled hypertension 72 (86.7) 39 (95.1) 33 (78.6) 0.026
Dyslipidemia 23 (27.7) 13 (31.7) 10 (23.8) 0.422
Diabetes mellitus 7 (8.4) 4 (9.8) 3 (7.1) 0.713
Chronic obstructive pulmonary disease 11 (13.3) 8 (19.3) 3 (7.1) 0.097
Coronary heart disease 11 (13.3) 5 (12.2) 6 (14.3) 0.779
Cerebrovascular accident 9 (10.8) 5 (12.2) 4 (9.5) 0.738
Current smoker 55 (66.3) 30 (73.2) 25 (60.0) 0.189
Bicuspid aortic valve 2 (2.4) 0 (0) 2 (4.8) 0.494
Aortic regurgitation* 31 (37.3) 14 (34.1) 17 (40.5) 0.551
Preoperative hypoxaemia 39 (47.0) 20 (48.8) 19 (45.2) 0.746
Left ventricular ejection fraction (%) 62.5 ± 5.2 63.1 ± 6.1 62.0 ± 4.2 0.326
Pericardial effusion† 50 (60.2) 29 (70.7) 21 (46.1) 0.054
  1. Data are expressed as mean ± standard deviation, median (interquartile range) or n (%)
  2. MeanSaO2, average oxygen saturation; MinSaO2, nadir nocturnal oxygen saturation; T90SaO2, percentage of time with saturation lower than 90%
  3. *Including moderate-to-severe aortic regurgitation
  4. Refers to pericardial effusion of > 100 ml