Prevalence of asthma in patients with atopic dermatitis: A systematic review and meta-analysis.

BACKGROUND: It is well established that asthma is common in patients with atopic dermatitis (AD). OBJECTIVES: We performed a systematic review and meta-analysis to determine the prevalence of asthma and respiratory symptoms in individuals with AD as well as the association between AD and asthma. METHODS: At least 2 authors independently searched the medical databases PubMed, EMBASE, LILACS, and SCOPUS for all English-language studies with data on asthma prevalence among patients with AD or the association between AD and asthma. Pooled odds ratios with 95% confidence intervals (CIs) and pooled proportions were estimated with random-effects models. The Newcastle-Ottawa scale was used to assess study quality. RESULTS: The search yielded 39,503 articles. Of these, 213 studies were included in a quantitative analysis. The overall pooled prevalence of asthma was 25.7% (95% CI, 23.7-27.7) in patients with AD and 8.1% (95% CI, 7.0-9.4) among reference individuals. There was a significant association between AD and asthma when compared with reference individuals (odds ratio, 3.03; 95% CI, 2.64-3.47). LIMITATIONS: The definitions of AD and asthma differed across the included studies and varied from self-report to physician diagnosed. CONCLUSIONS: Asthma is a common comorbidity of AD. Physicians should be cognizant of this relationship and address asthma symptoms in their patients.

Placebo Response in Phase 3 Trials of Systemic Therapies for Moderate-to-Severe Plaque Psoriasis: A Systematic Review and Meta-Analysis.

BACKGROUND: Wide fluctuations in placebo responses have been reported in phase 3 trials of systemic therapies for moderate-to-severe plaque psoriasis. METHODS: In this systematic review and meta-analysis, we assessed placebo responses in phase 3 trials of systemic therapies for moderate-to-severe plaque psoriasis. The medical databases PubMed Medline, Embase, and Web of Science were searched for studies reporting on phase 3 psoriasis trials. A proportion meta-analysis determined the proportion of placebo-treated psoriasis patients obtaining a 75, 90, or 100% reduction in Psoriasis Area and Severity Index (PASI), that is, PASI75, PASI90, or PASI100, respectively, at week 12. In the assessment of PASI75 response, 44 trials with a total number of 7,972 patients were included. CONCLUSION: In pooled analyses, 5.2% (95% CI 4.7-5.7%) obtained PASI75, 2.1% (95% CI 1.7-2.4%) obtained PASI90, and 0.3% (95% CI 0.1-0.5%) obtained PASI100 among placebo receivers. No temporal changes were observed. The overall proportion of placebo responders in phase 3 psoriasis trials is low and does not appear to be increasing in recent years.