Table 1– Clinical and sleep study data
ExcludedIn the studyAHI
<1515–30>30
Subjects n1847023415581
Male8 (44.4)197 (41.9)70 (29.9)77 (49.7)*50 (61.7)*
Age yrs68.6±0.568.2±0.568.1±0.468.4±0.568.2±0.5
BMI kg·m−224.7±4.224.6±3.324.3±3.324.6±3.025.8±3.5*
Diabetes0 (0)11 (2.3)6 (2.6)3 (1.9)2 (2.5)
Current/past smoker4 (22.2)116 (23.8)49 (20.9)44 (28.4)*23 (28.4)*
Dyslipidaemia7 (38.9)133 (27.3%)62 (25.9)56 (35.8)*15 (17.2)
Glycaemia g·L−10.99±0.120.96±0.140.96±0.150.97±0.120.98±0.16
Cholesterol g·L−1
 Total2.26±0.312.26±0.332.25±0.332.27±0.342.28±0.31
 HDL0.66±0.290.65±0.180.68±0.190.65±0.170.59±18*
 LDL1.39±0.261.40±0.311.37±0.301.41±0.321.46±0.29
Triglycerides g·L−11.08±0.511.05±0.541.02±0.551.01±0.511.18±0.55*
ESS Score5.4±3.05.8±3.75.1±3.56.1±3.86.6±3.9
Obstructive AHI·h−119.9±22.318.5±14.07.0±3.620.4±4.5*41.1±11.8*
Central AHI·h−11.8±3.71.8±3.20.7±1.01.6±1.6*4.8±6.9*
ODI·h−110.8±15.97.8±8.23.3±3.17.9±5.1*18.6±11.0*
Sa,O2 %
 Time <90%2.5±9.31.5±5.51.05±5.61.3±3.93.2±7.1*
 Nadir89.8±5.490.1±4.091.5±2.889.5±4.2*87.8±4.8*
 Mean94.9±1.595.4±1.895.6±2.195.4±1.4*95.1±1.5*
ODI >10·h−1 %7 (38.9)136 (28.9)10 (4.3)50 (32.3)76 (93.8)
  • Data are presented as n, n (%) or mean±se. AHI: apnoea/hypopnoea index; BMI: body mass index; HDL: high density lipoprotein; LDL: low-density lipoprotein; ESS: Epworth Sleepiness Scale; ODI: oxyhaemoglobin desaturation index; Sa,O2; arterial oxygen saturation. *: p<0.05 from subjects presenting with an AHI <1.