NPPB and heart failure: Tables 5 and 6 show univariable and multivariable Cox regression analyses of clinical and laboratory variables and the chest X-ray score On univariable Cox regression analysis, age, gender, hospitalisation for heart failure in the previous year, prior MI or CABG, malignancy, lower systolic and diastolic blood pressures, lower heart rate, lower sodium, haemoglobin, chloride and albumin and higher potassium, renal function, troponin, and NT-proBNP, and a higher CXR score was related to mortality.