highly significantp = 0.0018
When entering the delta change of SII (hospital admission-discharge) in the GLM model, with length of hospital stay as nuisance covariate, delta SII showed a significant effect (higher reduction of SII, lower depression; F = 4.24, p = 0.0438) and the time x treatment interaction remained highly significant (F = 7.07, p = 0.0018).