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a. “Hospital stay length (days)” versus “Number of psychodrugs” for subgroups patients: “1 diagnostic” and “> 1 diagnostic”. The regression equations, correlations, p values and determination coefficient are presented in the correspondent colour for each subgroup. b, c, and d. Means and standard errors of hospital stay length, psychotropic drugs, and illicit drugs by subgroups. ns means no statistical significance by test Mann Whitney U
