Smoking-Induced Sex Differences in Clinical Outcomes in Patients Undergoing Mechanical Thrombectomy for Stroke

Jacqueline A. Frank, Kara Jo Swafford, Jill M. Roberts, Amanda L. Trout, Ann M. Stowe, Douglas E. Lukins, Stephen Grupke, Keith R. Pennypacker, Justin F. Fraser

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Objective: Ischemic stroke is the fifth leading cause of death in the United States. Smoking accelerates the onset of stroke by 10 years. The effects of smoking status on percent change in National Institutes of Health Stroke Scale (NIHSS) score, infarct volume, and edema volume were examined following mechanical thrombectomy for large vessel occlusion in patients with acute ischemic stroke. Methods: Subjects (N = 90; >18 years old) were divided into 3 groups based on smoking status: current smokers, previous smokers (defined as having quit >6 months before the ischemic event), and nonsmokers. Percent change in NIHSS score was defined as score at admission minus score at discharge divided by score at admission and was used as a predictor of functional outcome. Linear regression analysis was performed based on infarct or edema volume versus percent change in NIHSS score and separated by sex. Results: Consistent with previous findings, smokers experienced a stroke 10 years earlier than nonsmokers (P = 0.004). Statistically significant linear regressions existed between infarct volume or edema volume in relation to worsening change in NIHSS score with female smokers only. Stroke-induced tissue damage, as measured by magnetic resonance imaging or computed tomography, was predictive of functional recovery only in female smokers. Conclusions: These findings are valuable for patient counseling, particularly for women, for smoking cessation.

Original languageEnglish
Pages (from-to)e365-e372
JournalWorld Neurosurgery
Volume153
DOIs
StatePublished - Sep 2021

Bibliographical note

Funding Information:
The authors thank the patients and families who consented to enroll in BACTRAC.

Publisher Copyright:
© 2021 The Authors

Keywords

  • Sex differences
  • Smoking
  • Stroke
  • Thrombectomy

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology

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