Reproductive endocrinology

Association of Insulin-Like Growth Factor-1 With Polycystic Ovarian Syndrome: A Systematic Review and Meta-analysis

Endocr PractPublished Systematic review and meta-analysis

Pooled result · Serum IGF-1 levelsResult — go to the resultSMD 0.89 95% CI 0.34–1.45

Authors' conclusion

These data suggest that elevated serum IGF-1 levels may not be a major cause of PCOS pathogenesis. Body mass index may be a major determinant of serum IGF-1.

Study context

Population
Patients with PCOS and normal controls; studies from PubMed, Embase, Web of Science, Cochrane Library and China National Knowledge Infrastructure (up to July 2022)
Participants
657 patients20 studies
Comparison
PCOS vs normal controls
  • PCOSn = 362
  • Controlsn = 295reference
Outcome
Serum IGF-1 levels
Methodological detailsrandom-effects model, subgroup analyses, sensitivity analysis
  • Random-effects model
  • Subgroup analyses
  • Sensitivity analysis

Pooled result

As reported in the abstract

SMD

0.89

95% CI 0.34–1.45

P = 0.002

PCOSvs Controls
SMD 0.89 (95% CI 0.34–1.45); P = 0.002
Heterogeneity I2
89%

Further pooled results

Serum IGF-1 by BMI subgroup

Elevated IGF-1 associated with normal-weight and overweight PCOS patients; no significant association with obesity

Sensitivity analysis and publication bias

No individual study significantly affected the pooled result; no publication bias observed

Original publication

Association of Insulin-Like Growth Factor-1 With Polycystic Ovarian Syndrome: A Systematic Review and Meta-analysis. Endocr Pract. Published 11 December 2022. doi:10.1016/j.eprac.2022.12.004

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