Table 1 Parametric and non-parametric tests identified in the 407 studies on psychiatric readmission

Parametric Tests

ANOVA (analysis of variance), Discriminant analysis, F-test, K means cluster analysis, Levene test, Likelihood ratio test, Linear discriminant analysis, MANOVA, Parc test, Principal component analysis, Power analysis, Pregibon Link test, Student-Newman-Keuls, T-test, Wald test, Z-test

Non-Parametric Tests

Chi-squared test, Discriminant function analysis, Fisher’s exact test, Friedman’s variance analysis, Kolmogorov-Smirnov test, Kruskal-Wallis test, Mann-Whitney U test, McNemar test, Tau test, Wilcoxon test