A77 1726 serum concentration | DAS28 response category | Total | |
---|---|---|---|

Good | Non- 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/l | 10 (40%)^{a} | 8 (32%)^{b} | 18 (72%) |

<16 mg/l | 0 (0%)^{c} | 7 (28%)^{d} | 7 (28%) |

Total | 10 (40%) | 15 (60%) | 25 (100%) |