Table 3

 2×2 table for response versus A77 1726 serum concentration

A77 1726 serum concentrationDAS28 response categoryTotal
GoodNon- or moderate
Values are n (%).
PPV (positive predictive value)  =  a/(a+b).
NPV (negative predictive value)  =  d/(c+d).
Likelihood ratio for positive test result  =  [a/(a+c)]/[b/(b+d)].
Likelihood ratio for negative test result  =  [c/(a+c)]/[d/(b+d)].
DAS28, 28 joint disease activity score.
⩾16 mg/l10 (40%)a8 (32%)b18 (72%)
<16 mg/l0 (0%)c7 (28%)d7 (28%)
Total10 (40%)15 (60%)25 (100%)