2.5. Statistical Analyses 
depression, PTSD
REGRESSION
To evaluate the psychological adjustment of HWCs during the COVID-19 pandemic (H1), we conducted a descriptive analysis of their PTSD and depression symptoms. There were no significant differences in the baseline values of the EW and NW groups, except in relation to negative emotions (EW: M = 6.45, SD = 4.13; NW: M = 3.24; SD = 3.28; F = 2.109; t = −1.42; Finally, to evaluate the power of the linguistic markers to predict reductions in symptoms (H4), delta values (∆) were computed for differences between pre-scores and post-scores in global PTSD and depression symptoms in the EW group. ∆ values for linguistic categories were computed by subtracting the scores for the first writing session (only) from the corresponding scores for the third writing session. The ∆ values for PTSD and depression in the EW group were then regressed onto their ∆ values for cognitive processing, emotional processing, perceived threat to life, and self-immersed processing in a series of hierarchical multiple regression models. All analyses were conducted using SPSS (IBM, New York, NY, USA). 