Table 2

Results of sleep recordings

HT group (n=102)NHT group (n=102)OR (95% CI)Adjusted OR (95% CI)
AHI=apnoea-hypopnoea index; DI=desaturation index; SI=snoring index.
Parameters of sleep disordered breathing in the hypertensive (HT) and non-hypertensive (NHT) groups are presented as mean (SD) for continuous variables and as n (%) for proportions. For each parameter the odds ratio (OR) for hypertension with 95% confidence interval (95% CI) is presented as well as the adjusted OR after adjusting for neck circumference and physical inactivity
AHI10.8 (12.2)7.3 (8.9)1.03 (1.00 to 1.06)1.01 (0.98 to 1.05)
AHI ≥1038 (37%)24 (24%)1.9 (1.0 to 3.4)1.4 (0.7 to 2.7)
DI8.5 (11)5.2 (8.3)1.04 (1.01 to 1.08)1.02 (0.98 to 1.06)
DI ≥1030 (29%)12 (12%)3.0 (1.4 to 6.4)2.3 (1.0 to 5.3)
Lowest desaturation (%)81.9 (7.3)84.7 (6.1)0.94 (0.90 to 0.98)0.94 (0.89 to 0.99)
SI (%)10.2 (11.4)7.5 (11.0)1.03 (1.00 to 1.06)1.01 (0.98 to 1.04)