TABLE 4.
Stepwise linear regression showing predictors of blood pressure dip (%), r square 0.235, and stepwise logistic regression showing predictors of a non-dipping status, r square 0.098
| Variable | B(95%CI) | Standardised β | p value |
| Stepwise linear regression | |||
| ODI | −0.136 (−0.182– −0.09) | −0.351 | 0.005 |
| Smoking pack-years | −0.216 (−0.131– −0.301) | −0.305 | 0.014 |
| Stepwise logistic regression | |||
| ODI | 1.047 (1.001–1.095) | 0.046 | 0.045 |
Independent variables AHI, ODI, age, BMI, smoking pack-years, Min SpO2, HOMA. AHI: apnoea–hypopnoea index; ODI: oxygen desaturation index; BMI: body mass index; Min SpO2: minimum oxygen saturations; HOMA: homeostasis model assessment.