FGF21 and susceptibility to pneumonia measurement: Multivariate Cox regression analyses showed that FGF21, as a categorical variable, was an independent predictor for all-cause mortality, MACEs and pneumonia (HR, 3.357, 95% CI, 2.128–5.295, p < 0.001; HR, 1.575, 95% CI, 1.046–2.371, p = 0.029; HR, 1.784; 95% CI, 1.124–2.830; p = 0.014, respectively).