Table 2.
Univariate analysis of clinical and anthropomorphic variables as predictors of abnormal oximetry.
| Abnormal OXI | ODI ≥15 | CT-90 ≥ 1.0 | ||||
|---|---|---|---|---|---|---|
| (n = 295) | (n = 56) | (n = 193) | ||||
| OR (95% CI) | P-Value | OR (95% CI) | P-Value | OR (95% CI) | P-Value | |
| Age, years | 1.1 (1.0–1.1) | <0.01 | 1.0 (1.0–1.1) | <0.05 | 1.0 (1.0–1.1) | <0.01 |
| BMI, kg/m2 | 1.2 (1.1–1.3) | <0.01 | 1.1 (1.1–1.2) | <0.01 | 1.1 (1.1–1.2) | <0.01 |
| WHR ≥1.0 | 1.1 (1.1–1.2) | <0.01 | 1.1 (1.0–1.1) | <0.01 | 1.1 (1.1–1.1) | <0.01 |
| ESS | 1.0 (1.0–1.1) | 0.62 | 1.0 (1.0–1.1) | 0.29 | 1.0 (1.0–1.0) | 0.71 |
| Comorbid medical conditions | ||||||
| Diabetes mellitus | 2.2 (0.8–5.8) | 0.12 | 2.6 (1.2–5.7) | <0.05 | 3.0 (1.4–6.3) | <0.01 |
| Hypertension | 2.4 (1.4–4.3) | <0.01 | 2.8 (1.6–5.0) | <0.01 | 1.9 (1.2–3.0) | <0.01 |
| Smoking | 1.5 (0.6–3.5) | 0.38 | 2.1 (0.9–4.8) | 0.07 | 1.2 (0.6–2.5) | 0.53 |
| Patient-reported symptoms | ||||||
| Snoring | 1.6 (1.0–2.5) | 0.06 | 1.9 (1.0–3.7) | 0.07 | 1.0 (0.7–1.6) | 0.85 |
| Erectile/sexual dysfunction | 1.3 (0.7–2.5) | 0.40 | 1.4 (0.7–2.8) | 0.35 | 1.2 (0.7–2.0) | 0.57 |
| Fatigue | 1.0 (0.6–1.6) | 0.83 | 1.1 (0.6–2.1) | 0.74 | 0.6 (0.4–1.0) | 0.05 |
| Sleep difficulties | 0.7 (0.4–1.1) | 0.09 | 0.8 (0.4–1.5) | 0.39 | 0.7 (0.5–1.1) | 0.11 |
| Irregular breathing | 1.5 (0.9–2.7) | 0.14 | 1.2 (0.7–2.3) | 0.50 | 1.5 (0.9–2.3) | 0.11 |
| Sleepiness | 1.5 (0.6–3.5) | 0.38 | 2.1 (0.9–4.8) | 0.07 | 1.2 (0.6–2.5) | 0.53 |
BMI, body mass index; WHR, waist to hip ratio; ESS, Epworth Sleepiness Scale score; OXI, ambulatory overnight oximetry; ODI, oxygen desaturation index; CT-90, percentage of recording time at oxygen saturation <90%.