Table 1 Characteristic of included studies. IBD: Inflammatory Bowell Disease, CD: Crohn Disease, UC: ulcerative colitis, COPD: Chronic obstructive pulmonary disease, U.K: United Kingdom; N.R: non-reported
Author | Year | Country | Cohort Size | Study design (prospective/retrospective) | Mean IBD, (Age) | Male, (%) | Tobacco | Included diseases |
|---|---|---|---|---|---|---|---|---|
Raj A. | 2008 | U. K | 2.192 | Retrospective | CD: 60; UC: 61 | CD: 46; UC: 41 | CD: 23% current and 46% former. UC: 5% current and 50% former | Asthma; COPD; Chronic cough; Bronchiectasis; Chronic bronchitis |
Brassard P. | 2014 | Canada | 280.082 | Retrospective | Ages broken up by range | CD: 69; UC: 72 | N. R | Asthma; COPD |
Ekbom A. | 2008 | Sweden | 180.239 | Retrospective | Ages broken up by range | N. R | N. R | COPD |
Kang E. | 2018 | South Korea | 20.042 | Retrospective | N. R | N. R | N. R | COPD |