{
"papers": [
{
"n": 549,
"doi": "10.1007/s00702-019-02080-2",
"value": "-0.27",
"method": "Meta-analysis of postmortem studies",
"metric": "Hedges' g for PV cell density reduction in schizophrenia",
"n_analyzed": 549,
"ci_or_error": "p = 0.03",
"text_access": "fulltext",
"n_definition": "Total subjects across studies (n=274 SCZ, n=275 controls)",
"scope_region": "Prefrontal cortex",
"study_system": "Postmortem brain, schizophrenia",
"taxonomic_level": "PV+ cell type",
"scope_population": "All PV+ neurons in region",
"value_source_sentence": "The results suggest that parvalbumin interneurons are reduced in density in the frontal cortex of patients with schizophrenia (Hedges' g = - 0.27; p = 0.03).",
"experimental_conditions": "Prefrontal cortex, PV immunohistochemistry"
},
{
"n": 0,
"doi": "10.3389/fphar.2021.689473",
"value": "Meta-analytical evidence positive",
"method": "Meta-analysis and systematic review",
"metric": "Evidence of PV loss in bipolar disorder",
"n_analyzed": 0,
"ci_or_error": null,
"text_access": "fulltext",
"n_definition": "Not specified in abstract",
"scope_region": "Multiple brain regions",
"study_system": "Postmortem brain, bipolar disorder",
"taxonomic_level": "PV+ cell type",
"scope_population": "All PV+ neurons",
"value_source_sentence": "We hereby report meta-analytical evidence of parvalbumin interneurons loss or dysfunction in the brain of patients with Bipolar Affective Disorder.",
"experimental_conditions": "Multiple brain regions"
}
],
"comparison_id": "pv-density-meta-analyses-comparison",
"comparison_name": "PV interneuron density/expression changes across psychiatric disorder meta-analyses",
"comparison_type": "convergent evidence",
"what_it_reveals": "PV deficits are shared across psychiatric disorders but with variable effect sizes and significance, suggesting a transdiagnostic vulnerability.",
"homogeneity_check": {
"caveats": [
"Schizophrenia meta-analysis focused on prefrontal cortex while BPAD review covered multiple regions",
"Different outcome measures: cell density vs mRNA vs combined"
],
"n_definition_uniform": "false",
"scope_region_uniform": "false",
"taxonomic_level_uniform": "true",
"scope_population_uniform": "true"
},
"suggested_plot_type": "forest plot"
}