Association of platelet laboratory parameters with bleeding score. Results shown are the means ± SEM for the platelet count, IPF, MPV, and platelet FSC in ITP patients stratified by bleeding score (bleeding score 0, n = 18; 1, n = 22; 2, n = 11; and 3 or 4, n = 6). P values (above each data set) are for univariate ordinal logistic regressions with respect to bleeding score.