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. 2022 Jan 30;14(3):621. doi: 10.3390/nu14030621

Figure 2.

Figure 2

Study outcomes at qualitative level for the most used questionnaires compared between probiotic versus placebo intervention. ↔: no significant differences between the groups; ↑: improvement p < 0.05; ↑↑: improvement p < 0.01; ↑↑↑: improvement p < 0.001; BAI: Beck Anxiety Inventory; BDI: Beck Depression Inventory; DASS-42: Depression, Anxiety and Stress Scale; GHQ: General Health Questionnaire; HADS-A/-D: Hospital Anxiety and Depression Scale; HAM-A: Hamilton Anxiety Rating Scale; HAM-D: Hamilton Depression Rating Scale; LEIDs: Leiden index of depression severity; POMS: Profile of Mood States; PSQI: Pittsburgh Sleep Quality Index; PSS: Perceived Stress Scale; RBANS: Repeatable Battery for the Assessment of Neuropsychological Status; SCL90: Symptoms Checklist-90; STAI: State Trait Anxiety Inventory.