On the other hand, the individuals carrying the NOS2 c.1823C>T GG genotype showed an increased risk of both ARDS (p = 0.046, OR = 2.59, 95% CI = 0.99–6.77) and MODS (p = 0.045, OR = 2.46, 95% CI = 0.99–6.07) compared to the individuals with at least one A allele (GA or AA). This evidence concerns the gene NOS2 and acute respiratory distress syndrome.