Green et al33 | Prospective study of 63 patients with early RA; 6 months | Disease duration of >12 weeks | III |
Gough et al53 | Prospective study of 120 patients with early RA; 1 year study | RF positive, Dw4/Dw14 genotype high risk group for erosive disease | III |
Harrison et al63 | Prospective study of 258 patients with early RA; 1–2 year study | Female and swollen/tender joints | III |
Masi 64 | Prospective study of 50 patients with early RA; mean study interval 5.7 years | RF positive, female, and swollen/tender joints | III |
Prevoo et al65 | Prospective study of 227 patients with early RA; median follow up 3.9 years | Swollen/tender joints and ESR as component of DAS score | III |
Tunn and Bacon66 | Prospective study of 65 patients with early RA; 1 year study | RF positive, ESR, 30 mm/1st h | III |
Wolfe67 | Prospective study of 503 patients with early RA and 638 with undifferentiated polyarthritis; mean study interval 6.9 years | RF positive | III |