Table 2. Prognostic performance in IgA nephropathy at different follow-up times

Follow-upTrue PositiveTrue NegativeFalse PositiveFalse NegativeSensitivitySpecificityAccuracy
Baseline
    steroid treatment alone134230192.958.364.0
    histologic score alone36571121.490.379.1
    steroid treatment and histologic score114626378.663.966.3
Six-month follow-up
    steroid treatment, histologic score, and proteinuria change after 6 mo105121471.470.870.9
At least 1-year follow-up
    previous covariates plus increase in last proteinuria value of at least 1 g versus previous mean follow-up value116111378.684.783.7