| Variable | NC (n = 10) | MS (n = 15) | CS (n = 15) | PCS (n = 15) | P-value |
| Age, ± SD | 50.3 ± 6.4 | 57.6 ± 5.7 | 57.9 ± 10 | 57.3 ± 7.4 | 0.0716 |
| Male gender, n (%) | 6 (60) | 8 (53) | 5 (33) | 6 (40) | 0.5129 |
| Comorbidities (self-reported), n (%) | |||||
| Mellitus diabetes | 1 (10) | 4 (26) | 5 (33) | 3 (20) | 0.5729 |
| Hypertension | 4 (40) | 2 (13) | 8 (53) | 6 (40) | 0.1418 |
| Obesity | 2 (20) | 2 (13) | 7 (46) | 0 (0) | 0.0127*f |