1. Prevalence and correlates of manic/hypomanic and depressive predominant polarity in bipolar disorder: Systematic review and meta-analysis
- Author
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Bartoli, F, Bassetti, C, Gazzola, M, Gianfelice, L, Cavaleri, D, Crocamo, C, Carra, G, Bartoli F., Bassetti C., Gazzola M., Gianfelice L., Cavaleri D., Crocamo C., Carra G., Bartoli, F, Bassetti, C, Gazzola, M, Gianfelice, L, Cavaleri, D, Crocamo, C, Carra, G, Bartoli F., Bassetti C., Gazzola M., Gianfelice L., Cavaleri D., Crocamo C., and Carra G.
- Abstract
Background Identification of the predominant polarity, i.e. hypomanic/manic (mPP) or depressive predominant polarity (dPP), might help clinicians to improve personalised management of bipolar disorder. Aims We performed a systematic review and meta-analysis to estimate prevalence and correlates of mPP and dPP in bipolar disorder. Method The protocol was registered in the Open Science Framework Registries (https://doi.org/10.17605/OSF.IO/8S2HU). We searched main electronic databases up to December 2023 and performed random-effects meta-analyses of weighted prevalence of mPP and dPP. Odds ratios and weighted mean differences (WMDs) were used for relevant correlates. Results We included 28 studies, providing information on rates and/or correlates of mPP and dPP. We estimated similar rates of mPP (weighted prevalence = 30.0%, 95% CI: 23.1 to 37.4%) and dPP (weighted prevalence = 28.5%, 95% CI: 23.7 to 33.7%) in bipolar disorder. Younger age (WMD = -3.19, 95% CI: -5.30 to -1.08 years), male gender (odds ratio = 1.39, 95% CI: 1.10 to 1.76), bipolar-I disorder (odds ratio = 4.82, 95% CI: 2.27 to 10.24), psychotic features (odds ratio = 1.56, 95% CI: 1.01 to 2.41), earlier onset (WMD = -1.57, 95% CI: -2.88 to -0.26 years) and manic onset (odds ratio = 13.54, 95% CI: 5.83 to 31.46) were associated with mPP (P < 0.05). Depressive onset (odds ratio = 12.09, 95% CI: 6.38 to 22.90), number of mood episodes (WMD = 0.99, 95% CI: 0.28 to 1.70 episodes), history of suicide attempts (odds ratio = 2.09, 95% CI: 1.49 to 2.93) and being in a relationship (odds ratio = 1.98, 95% CI: 1.22 to 3.22) were associated with dPP (P < 0.05). No differences were estimated for other variables. Conclusions Despite some limitations, our findings support the hypothesis that predominant polarity might be a useful specifier of bipolar disorder. Evidence quality was mixed, considering effects magnitude, consistency, precision and publication bias. Different predominant polarities may identify subgr
- Published
- 2024