Validation of a Prediction Rule for the Diagnosis of Rheumatoid Arthritis in Patients with Recent Onset Undifferentiated Arthritis
Table 5
Cost effectiveness ratio for complete van der Helm-van Mil prediction score, score without anti-CCP, score without RF, and score without anti-CCP and without RF.
Diagnostic score
Cost on 100 patients (US dollars)
Number of patients correctly diagnosed
Incremental cost
Incremental number of correctly diagnosed
ICER
vHvM without RF and without anti-CCP (cut off score >5.66)
1180
61
—
—
—
vHvM adding RF (without anti-CCP) (cut off score >6)
1380
64
200
4
50
vHvM adding anti-CCP (without RF) (cut off score >6.7)
7380
79
6200
18
344
complete vHvM (with anti-CCP and RF) (cut off score >6.94)
7580
80
6400
19
337
vHvM: van der Helm-van Mil prediction score; RF: rheumatoid factor; ICER: incremental cost effectiveness ratio.