BRS <3 ms·mmHg−1 | BRS >3 ms·mmHg−1 and <6 ms·mmHg−1 | BRS >6 ms·mmHg−1 | p-value | |
Subjects n | 76 | 292 | 433 | |
BMI kg·cm−2 | 27.3±3.7 | 25.5±3.8 | 25.1±3.7 | <0.001 |
Neck circumference cm | 39.2±3.7 | 37.0±3.8 | 36.7±4.0 | <0.001 |
Hypertension % | 68 | 48 | 40 | <0.001 |
Diabetes % | 4 | 4 | 1 | 0.03 |
Dyslipidaemia % | 47 | 35 | 33 | ns |
Alcohol % | 41 | 25 | 23 | 0.009 |
Smoking % | 26 | 12 | 66 | <0.001 |
SBP 24-h mmHg | 127.6±16.8 | 120.0±13.9 | 117.1±13.5 | <0.001 |
DBP 24-h mmHg | 81.2±9.2 | 76.1±7.6 | 75.1±7.6 | <0.001 |
SBP diurnal mmHg | 130.1±16.9 | 123.5±15.7 | 121.7±13.4 | <0.001 |
DBP diurnal mmHg | 80.5±9.1 | 76.8±8.7 | 76.6±7.5 | 0.001 |
SBP nocturnal mmHg | 115.1±13.7 | 107.2±15.8 | 105.3±15.2 | <0.001 |
DBP nocturnal mmHg | 71.0±8.2 | 66.1±9.7 | 65.7±8.9 | <0.001 |
BRS ms·mmHg−1 | 2.9±0.5 | 4.6±0.9 | 9.2±3.2 | <0.001 |
AHI events·h−1 | 23.5±15.2 | 20.1±14.2 | 20.0±15.0 | 0.001 |
ODI events·h−1 | 13.2±10.5 | 9.4±9.1 | 8.6±9.3 | <0.001 |
Mean SpO2 % | 94.6±1.7 | 95.3±1.6 | 95.4±1.8 | 0.001 |
Minimal SpO2 % | 87.9±4.4 | 89.7±3.9 | 90.0±4.0 | <0.001 |
Time with SpO2 <90% % | 3.7±6.9 | 2.0±6.4 | 1.5±5.0 | 0.006 |
Respiratory AAI events·h−1 | 18.2±12.4 | 15.4±10.3 | 15.2±10.3 | <0.001 |
Data are presented as mean±sd, unless otherwise stated. BMI: body mass index; SBP: systolic blood pressure; DBP: diastolic blood pressure; BRS: baroreceptor sensitivity; AHI: apnoea–hypopnoea index; ODI: oxygen desaturation index; SpO2: oxygen saturation measured by pulse oximetry; AAI: autonomic arousal index; ns: nonsignificant. Significance was determined by ANOVA.