Table 4– Interquartile comparisons for trend of the frequency of systolic and diastolic hypertension according to the degree of sleep-related breathing disorder. Severity is defined using oxyhaemoglobin desaturation index (ODI) and apnoea/hyponoea index (AHI)
HypertensionIndexQuartile % of hypertensiveStatistics
Q1Q2Q3Q4ROR (95% CI)p-value
SystolicODI6.16.59.725.60.1914.94 (2.10–11.74)0.0003
AHI4.38.88.820.20.1162.61 (1.22–5.58)0.01
DiastolicODI10.612.215.733.70.1784.31 (2.08–8.92)0.0003
AHI11.313.621.122.30.0501.83 (0.93–3.59)0.08
  • An adjustment was made for age, sex, body mass index, dyslipidaemia, diabetes, smoking status, and alcohol consumption.