IL5 and major depressive disorder: However, there were no significant correlations between depression-related behavior (latency to immobility on the FST) and the following lung measures: average inflammation area length (r = −0.046, p = 0.661), number of inflammation areas (r = −0.086, p = 0.408), mucus (r = −0.001, p = 0.993) and lung IL-5 expression (r = 0.155, p = 0.157).