An intergroup analysis was performed using the non-parametric Mann-Whitney tests for two independent samples to compare the results between groups (mindfulness group and control group) at both pre-and post-intervention for all variables under analysis. The non-parametric related samples Wilcoxon matched-pairs signed-ranks test was used to assess whether there were significant changes within the groups, pre-and post-intervention. The effect sizes of the differences were estimated using Cohen’s d. In order to verify whether there was an association between variables at the post-intervention and for the mindfulness group, Spearman’s correlation coefficients test was performed for anxiety, depression, stress, positive and negative affect, self-esteem, and also for capacities and state of mindfulness. The Statistical Package for the Social Sciences (SPSS version 25.0 for Windows 10) was used.
The qualitative analysis was conducted based on the content of the inmates’ narratives at the end of the program in response to the open questions. The following response categories and subcategories were extracted: Experience (usefulness, difficulties, and constraints); Perceived changes in daily life (awareness, choice, serenity, and acceptance); Expected changes in life after prison (observation).
The qualitative analysis was conducted based on the content of the inmates’ narratives at the end of the program in response to the open questions. The following response categories and subcategories were extracted: Experience (usefulness, difficulties, and constraints); Perceived changes in daily life (awareness, choice, serenity, and acceptance); Expected changes in life after prison (observation).