Serum Irisin Levels are Inversely Correlated with Acute Ischaemic Stroke Incidence: Implications for Early Diagnosis in Southern China.

Objective: This study aimed to examine the correlation and prognostic value of serum irisin levels in acute ischaemic stroke (AIS) and the subsequent development of hemiplegia.

Methods: This study recruited participants from the Department of Neurology and Rehabilitation Medicine at Shunde Hospital, Southern Medical University. The Fugl-Meyer Assessment was used to assess functional impairment. Serum irisin levels were measured using the enzyme-linked immunosorbent assay method. Multivariate logistic regression was employed to explore the factors related to serum irisin levels and AIS.

Results: Serum irisin levels in the AIS group were significantly lower than those in the control group. However, no significant association was observed between serum irisin and stroke severity within the AIS cohort. Multivariate logistic regression analysis revealed an inverse correlation between serum irisin levels and AIS risk, indicating that it serves as a protective factor against AIS. The increase in serum irisin levels (adjusted odds ratio (OR) 0.938, 95% confidence interval [CI]: 0.899-0.977 per 100 pg/mL increment) was associated with a decreased risk of AIS. Analysis of the receiver operating characteristic curve confirmed the diagnostic value of serum irisin for AIS, with the area under the curve being 0.591 (95% CI: 0.522-0.659, p = 0.012).

Conclusion: Serum irisin levels were significantly lower in AIS and were identified as a protective factor, suggesting that serum irisin may have diagnostic value for AIS.