In a multivariate Cox regression analysis , change in NT-proBNP concentration during admission , change from discharge to @month after discharge , and the absolute NT-proBNP concentration at @ month after discharge were of independent prognostic value for both end points ( hazard ratios for HF readmission or mortality : @ , @ % confidence interval -LSB- CI -RSB- @-@ @ , Wald @ -LSB- P = @ -RSB- versus @ , @ % CI @-@ @ , Wald @ -LSB- P < @ -RSB- versus @ , @ % CI @-@ @ , Wald @ -LSB- P = @ -RSB- , respectively .