Table 4.
The multiple linear regression model for the AHI, apnea index and hypopnea index.
| AHI (Events/h) R2 = 0.12 | B (95% IC) | Standardized Regression Coefficients | p |
|---|---|---|---|
| Age (Years) | 0.36 (0.19 to 0.52) | 0.14 | <0.001 |
| Sex (Male) | 8.29 (6.23 to 10.35) | 0.24 | <0.001 |
| Obesity (BMI ≥ 30 kg/m2) | 8.54 (6.44 to 10.64) | 0.26 | <0.001 |
| Prediabetes (HbA1c 5.7 to 6.4%) | 2.20 (0. 10 to 4.31) | 0.58 | 0.040 |
| Apnea index (events/h) R2 = 0.06 | |||
| Age (Years) | 0.21 (0.13 to 0.30) | 0.17 | <0.001 |
| Sex (Male) | 3.58 (2.55 to 4.62) | 0.20 | <0.001 |
| Obesity (BMI ≥ 30 kg/m2) | 1.73 (0.67 to 2.78) | 0.11 | 0.001 |
| Prediabetes (HbA1c 5.7 to 6.4%) | 0.16 (−0. 90 to 1.22) | 0.00 | 0.765 |
| Hypopnea index (events/h) R2 = 0.12 | |||
| Age (Years) | 0.13 (0.03 to 0.23) | 0.11 | 0.013 |
| Sex (Male) | 3.81 (2.57 to 5.05) | 0.15 | <0.001 |
| Obesity (BMI ≥ 30 kg/m2) | 5.94 (4.68 to 7.21) | 0.29 | <0.001 |
| Prediabetes (HbA1c 5.7 to 6.4%) | 1.87 (0. 61 to 3.14) | 0.82 | 0.004 |
B: unstandardized beta; AHI: Apnea–hypopnea index; BMI: body mass index. The adequacy of the regression models was verified through submitting the residuals to a normality test: in all cases p < 0.001.