Table 2.
Characteristics of the Study Population and Comparison between the Patients with Mild-to-moderate OSA and Those with Severe OSA.
| Total | Without severe OSA | With severe OSA | P value | |
|---|---|---|---|---|
| n | 107 | 52 | 55 | |
| Continuous variables, median [range] | ||||
| Age, years old | 67 [35–84] | 64 [35–81] | 69 [35–84] | 0.02 |
| Height, cm | 164.0 [141.0–181.2] | 164.0 [141.0–181.2] | 164.0 [142.0–180.0] | 0.87 |
| Body weight, kg | 69.0 [42.0–118.0] | 64.6 [42.0–103.0] | 73.2 [45.0–118.0] | 0.002 |
| BMI, kg/m2 | 26.4 [17.3–42.3] | 23.9 [17.3–40.6] | 28.3 [17.7–42.3] | < 0.001 |
| Neck circumference, cm | 38.5 [31.0–47.0] | 38.0 [31.0–43.0] | 40.0 [32.0–47.0] | < 0.001 |
| Apnea hypopnea index, /hr | 31.0 [1.9–75.9] | 16.5 [1.9–27.9] | 48.6 [30.5–75.9] | < 0.001 |
| Epworth sleepiness scale | 6 [0–22] | 6 [0–22] | 7 [0–21] | 0.17 |
| STOP-Bang score | 5 [2–8] | 3.5 [2–7] | 5 [2–8] | < 0.001 |
| Categorical variables, n (%) | ||||
| Male | 73 (68.2) | 33 (63.5) | 40 (72.7) | 0.41 |
| Age ≧ 50 years old | 97 (90.7) | 45 (86.5) | 52 (94.5) | 0.19 |
| BMI≧30 kg/m2 | 34 (31.8) | 8 (15.4) | 26 (47.3) | < 0.001 |
| Neck circumference ≧ 40cm | 39 (36.4) | 11 (21.2) | 28 (50.9) | 0.002 |
| Tired during the day | 61 (57.5) | 26 (50.0) | 35 (64.8) | 0.17 |
| Snoring history (%) | 70 (65.4) | 27 (51.9) | 43 (78.2) | 0.005 |
| Observed apnea while asleep | 40 (37.7) | 13 (25.0) | 27 (50.0) | 0.01 |
| Hypertension | 71 (66.4) | 29 (55.8) | 42 (76.4) | 0.03 |
| Hyperlipidemia | 50 (46.7) | 18 (34.6) | 32 (58.2) | 0.02 |
| Diabetes mellitus | 39 (36.4) | 19 (36.5) | 20 (36.4) | 1 |
| Cardiovascular disease | 25 (23.4) | 13 (25.0) | 12 (21.8) | 0.82 |
| Cerebrovascular disease | 10 (9.3) | 5 (9.6) | 5 (9.1) | 1 |
| STOP-Bang score ≧ 5 | 56 (52.3) | 12 (23.1) | 44 (80.0) | < 0.001 |
BMI, body mass index; OSA, obstructive sleep apnea