a slight trendp = 0.175
Mast Cell Density, Survival, and Occurrence of AE-IPF The correlation between the survival time and MC density was not statistically significant, although there was a slight trend towards a shorter survival and low MC density (319 MCs or less per square millimeter) (RR 1.59 95%CI 0.81 − 3.10, p = 0.175).