CALCA and infection: After adjusting age, residual renal function, and primary diseases, the multivariate regression analysis showed that eGFR (OR = 0.782, 95% CI 0.667–0.917, P = 0.002), PCT (OR = 1.788, 95% CI 1.193–2.680, P = 0.005, while no cases of severe infection were identified in this study) at the first visit were independent risk factors for emergency dialysis and rhBNP was a protective factor for emergency dialysis (OR = 0.195, 95% CI 0.084–0.451, P < 0.001) (Table 5).