TABLE 5.
Regression models for association between % blood pressure dipping and obstructive sleep apnea severity measures.
| %SBP dip |
%DBP dip |
%MAP dip |
||||
| Unadjusted β (95% CI) | Adjusted* β (95% CI) | Unadjusted β (95% CI) | Adjusted* β (95% CI) | Unadjusted β (95% CI) | Adjusted* β (95% CI) | |
| AHI | −0.05 (−0.10, 0.01) | −0.11 (−0.20,−0.02) | −0.11 (−0.19,−0.03) | −0.16 (−0.29,−0.04) | −0.08 (−0.15,−0.01) | −0.13 (−0.24,−0.02) |
| REM-AHI | −0.00 (−0.10, 0.10) | −0.03 (−0.10, 0.10) | −0.06 (−0.15, 0.03) | −0.05 (−0.17, 0.07) | −0.05 (−0.12, 0.03) | −0.05 (−0.15, 0.05) |
| NREM-AHI | −0.03 (−0.10, 0.03) | −0.08 (−0.20, 0.02) | −0.09 (−0.17, −0.01) | −0.13 (−0.26, 0.01) | −0.07 (−0.14, 0.01) | −0.11 (−0.22, 0.01) |
| 4% ODI | −0.08 (−0.15,−0.02) | −0.15 (−0.23,−0.06) | −0.17 (−0.26,−0.09) | −0.23 (−0.35,−0.11) | −0.13 (−0.21,−0.06) | −0.18 (−0.30,−0.09) |
| Resp arousal index | −0.03 (−0.11, 0.05) | −0.06 (−0.18, 0.05) | −0.09 (−0.21, 0.03) | −0.08 (−0.25, 0.09) | −0.06 (−0.16, 0.04) | −0.06 (−0.21, 0.09) |
| Nadir SpO2 | 0.08 (−0.15, 0.31) | 0.11 (−0.21, 0.43) | 0.44 (0.13, 0.76) | 0.56 (0.13, 0.99) | 0.30 (0.03, 0.58) | 0.38 (0.00, 0.76) |
| TST < 90% | −0.19 (−0.37, 0.00) | −0.32 (−0.57,−0.07) | −0.50 (−0.74,−0.26) | −0.67 (−0.99,−0.34) | −0.37 (−0.58,−0.16) | −0.54 (−0.82,−0.26) |
| Microarousal index | −0.02 (−0.10, 0.05) | −0.05 (−0.17, 0.08) | −0.09 (−0.20, 0.02) | −0.09 (−0.27, 0.08) | −0.06 (−0.16, 0.04) | −0.06 (−0.22, 0.09) |
| Total sleep time | 0.05 (−0.90, 0.99) | 0.00 (−1.04, 1.05) | 0.05 (−1.36, 1.46) | −0.01 (−1.51, 1.49) | −0.28 (−1.46, 0.90) | −0.40 (−1.66, 0.87) |
*Adjusted with age, body mass index at enrolment, parity, number of BP medications, gestational age at blood pressure assessment.
% Blood pressure dip = 100 × (daytime-nighttime blood pressure)/daytime blood pressure. SBP, systolic blood pressure; DBP, diastolic blood pressure; MAP, mean arterial pressure, AHI, apnea-hypopnea index; REM-AHI, apnea-hypopnea index during REM sleep; NREM-AHI, apnea-hypopnea index during NREM sleep; 4% ODI, 4% oxygen desaturation index; Resp arousal index, respiratory arousal index; SpO2, oxygen saturation during sleep; TST < 90%, total sleep time with oxygen saturation < 90%.
Bold values means p-value < 0.05.