Scadding [5] | Pulmonary | Chest radiograph stage | 136 | No | Single | No | Did not use computed tomography |
Neville [7] | Acute versus chronic | Rate of resolution | 818 | No | Single | No | Did not account for more than one factor in patient |
Grunewald [3, 8] | Löfgren versus non-Löfgren | Clinical outcome of Löfgren patients | 754 | Yes | Single | Yes | Series of studies, may not apply to other racial groups |
Wasfi [9] | Severe versus non-severe | Backward regression based on clinical parameters | 104 | Two different groups of clinicians assessed same patients | Single | No | Based on expert opinion, no follow-up analysis |
Prasse [10] | Acute versus chronic and duration of treatment | Evaluated patients seen within 1 year of presentation | 225 | No | Single | No | More useful for acute disease |
Baughman[11] | Acute versus chronic including therapy | Developed criteria for long-term outcome | 500 | No | Multi-centre | No | Retrospective look based on expert opinion |
Rodrigues[12] | Acute, relapse, fibrosis | Factor analysis | 137 | No | Multi-centre | No | Phenotypes were not distinct |
Walsh [13] | Severe versus non-severe | Regression analysis of multiple factors | 251 | Yes (additional 252) | Single | No | Only focused on advanced pulmonary disease |
Moller [14] | Various groups of patients | Expert opinion of grouping of patients | Not given | No | Multi-centre | Yes | Established criteria to be studied |
Schupp [15] | Organ clustering | Multi-factor analysis based on gene expression | 2163 | No | Multi-centre | Yes | Used genetic profile to identify associated organ manifestations |