Table 6.
Ferric reducing ability of plasma (FRAP) before (evening) and after (morning) polysomnography controlled sleep
| Patients group | FRAP [μM] measured at | Diff, 95% CI | |
| Evening | Morning | ||
| OSAS, n = 27 | 671 ± 221 | 602 ± 202 | 70 (7–133) |
| Severe OSAS, n = 11 | 729 ± 156 | 650 ± 170 | 79 (37–122) |
| CPAP-OSAS, n = 22 | 597 ± 199 | 591 ± 242 | 7 (-44–57) |
| Controls, n = 11 | 634 ± 229 | 597 ± 201 | 37 (-3–77) |
OSAS – patients with the untreated OSAS; CPAP-OSAS – patients with OSAS treated successfully after a first attempt with CPAP, controls – subjects without OSAS. Results expressed as a mean ± SD represent concentration of Fe3+ reduced ions after 3 min. incubation of plasma sample with the FRAP reagent. Diff, 95% CI – difference of means with 95% confidence interval
No significant differences (p > 0.05) were found for evening and morning FRAP within and between the studied groups.