With regard to a potential difference in NGAL/Cr between OSA patients versus non-OSA subjects stratified by gender, we still found no effect of OSA: median female OSA versus non-OSA = 8.49 vs. 9.47 ng/mg (p = 0.5981 by Mann-Whitney test), and median male OSA versus non-OSA = 4.49 vs. 5.31 ng/mg (p = 0.9757 by Mann-Whitney test). This evidence concerns the gene LCN2 and obstructive sleep apnea syndrome.