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Smoking significantly increases psoriasis risk and severity, impacting treatment response and comorbidities. Quitting smoking is crucial for managing this visible, disabling skin condition.

Keywords:
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Area of Science:

  • Dermatology
  • Public Health
  • Environmental Health

Background:

  • Smoking is a major environmental risk factor linked to numerous diseases, including inflammatory conditions.
  • Tobacco smoke contains over 7,000 chemicals, with nicotine being the primary addictive agent.
  • Psoriasis is an inflammatory immune-related condition associated with smoking.

Purpose of the Study:

  • To evaluate the association between smoking and psoriasis onset, severity, and treatment response.
  • To explore the impact of smoking on psoriasis comorbidities.
  • To understand the pathophysiological mechanisms linking smoking and psoriasis.

Main Methods:

  • Pooled analysis of 25 case-control studies to determine odds ratios for psoriasis in smokers.
  • Pooled analysis of three cohort studies to assess dose-response relationships.
  • Review of literature on smoking's impact on psoriasis severity, treatment, comorbidities, and underlying mechanisms.

Main Results:

  • Smokers have a 1.78 times higher odds of developing psoriasis.
  • A dose-response relationship exists: smoking 1-14 cigarettes/day increased risk by 1.81, while ≥25 cigarettes/day increased risk by 2.29.
  • Smoking exacerbates psoriasis severity, affects treatment efficacy, and is linked to comorbidities like cardiovascular disease and cancers.

Conclusions:

  • Psoriasis is a significant, visible disease associated with smoking.
  • Smoking influences psoriasis onset, severity, and related health issues.
  • Dermatologists can play a key role in encouraging smoking cessation to reduce patient health burdens.