Table 2 Comparisons of variables between patients with and without severe OSA

Demographic data

 Gender [n (%)]

< 0.001

 Female

298 (18)

182 (29)

116 (11)

 Male

1358 (82)

456 (71)

902 (89)

 Age (years) [M (Q1, Q3)]

40 (33, 50)

38 (30, 50)

41 (34, 50)

< 0.001

 BMI (kg/m²) [M (Q1, Q3)]

26.52 (24.33, 29.07)

25.02 (23.1, 27.34)

27.68 (25.44, 29.98)

< 0.001

 Waist circumference(cm) [M (Q1, Q3)]

97 (91, 104)

93 (86, 99)

100 (95, 106)

< 0.001

 Neck circumference(cm) [M (Q1, Q3)]

39 (37, 41)

38 (35, 40)

40 (38, 42)

< 0.001

Lifestyle habits

 Smoking [n (%)]

< 0.001

  0

966 (58)

468 (73)

498 (49)

  1

690 (42)

170 (27)

520 (51)

 Drinking [n (%)]

< 0.001

  0

1043 (63)

472 (74)

571 (56)

  1

613 (37)

166 (26)

447 (44)

 Lack of exercise [n (%)]

< 0.001

  0

656 (40)

287 (45)

369 (36)

  1

1000 (60)

351 (55)

649 (64)

 Poor sleep [n (%)]

0.976

  0

896 (54)

346 (54)

550 (54)

  1

760 (46)

292 (46)

468 (46)

 Emotional instability [n (%)]

0.472

  0

1186 (72)

450 (71)

736 (72)

  1

470 (28)

188 (29)

282 (28)

 Stress [n (%)]

0.904

  0

1211 (73)

465 (73)

746 (73)

  1

445 (27)

173 (27)

272 (27)

Medical history

 Hypertension [n (%)]

< 0.001

  0

1226 (74)

530 (83)

696 (68)

  1

430 (26)

108 (17)

322 (32)

 Family history of hypertension [n (%)]

0.458

  0

1157 (70)

453 (71)

704 (69)

  1

499 (30)

185 (29)

314 (31)

 Heart disease [n (%)]

0.715

  0

1535 (93)

589 (92)

946 (93)

  1

121 (7)

49 (8)

72 (7)

 Diabetes [n (%)]

0.384

  0

1586 (96)

615 (96)

971 (95)

  1

70 (4)

23 (4)

47 (5)

 Hypothyroidism [n (%)]

0.310

  0

1616 (98)

619 (97)

997 (98)

  1

40 (2)

19 (3)

21 (2)

OSA related symptoms

 Snoring [n (%)]

< 0.001

  0

39 (2)

36 (6)

3 (0)

  1

1617 (98)

602 (94)

1015 (100)

 Breathing cessations during sleep [n (%)]

< 0.001

  0

312 (19)

194 (30)

118 (12)

  1

1344 (81)

444 (70)

900 (88)

 Hypomnesia [n (%)]

0.020

  0

626 (38)

264 (41)

362 (36)

  1

1030 (62)

374 (59)

656 (64)

 Inattention [n (%)]

0.773

  0

770 (46)

300 (47)

470 (46)

  1

886 (54)

338 (53)

548 (54)

Sleep questionnaires

 ESS [n (%)]

< 0.001

  None

571 (34)

300 (47)

271 (27)

  Slight

530 (32)

211 (33)

319 (31)

  Moderate

325 (20)

91 (14)

234 (23)

  High

230 (14)

36 (6)

194 (19)

 BQ [n (%)]

< 0.001

  Low risk

143 (9)

120 (19)

23 (2)

  High risk

1513 (91)

518 (81)

995 (98)

 SBQ [n (%)]

< 0.001

  Low risk

225 (14)

183 (29)

42 (4)

  High risk

1431 (86)

455 (71)

976 (96)