| variable | elevated Cys C | normal Cys C | p |
| Arterial Hypertension (n/%) | 77(79%) | 104(74%) | NS |
| Coronary Artery Disease (n/%) | 34(35%) | 22(15.6%) | P=0.0005 |
| Heart Failure (n/%) | 17(17.5%) | 4(2.8%) | p=0.00009 |
| Microalbuminuria (n/%) | 9(16.36%) | 19(22.35%) | NS |
| Elevated NT-proBNP(n/%) | 28(35.9%) | 21(18.3%) | NS |
| AHI>30/h (n/%) | 61(62.9%) | 79(56.4%) | 0.01 |