Of the 26 principal studies of emphysema, the out- come is based on visual comparison in 10 (38.5%), on diagnosis in seven (26.9%), on ICD codes in five (19.2%) and on other sources including self-report in four (15.4%). Asthmatics are excluded in two (7.7%) studies. The ...
Those who had made physician visits for traffic accidents (ICD-9 code: E800-E848) or acute gastroenteritis (ICD-9 code: 008.8; 009.1; 558.3; 558.9) the same year and who had never been diagnosed as having chronic bronchitis were considered potential study controls. Any case or control ...
ICD-10 J20-J21, J42 J12, J13, J14, J15, J16, J17, J18, P23 ICD-9 466, 491, 490 480-486, 770.0 DiseasesDB 29135 10166 MedlinePlus 001087 000145 eMedicine article/807035 article/297108 topic list MeSH D001991 D011014 Duration Generally lasts two to three weeks May last longer tha...