VEGFA and sleep apnea syndrome: The SDB-positive group had a higher mean of VEGF levels on both days (day 1 mean, 373.6 ± 222.4; day 3 mean 400.6 ± 248.8) compared to the VEGF levels in the SDB-negative group (day 1, 310.8 ± 126.3; day 3, 312.9 ± 151.3; Fig. 3).