PTH and infection: Interestingly, the latest research found that the all-cause mortality with low PTH is similar to that of patients with SHPT undergoing hemodialysis (17), that a low serum iPTH level is an independent predictor of infection-related mortality in incident dialysis patients (48), and that even combinations of low iPTH with other specific indicators are independently associated with increased all-cause and cardiovascular mortality in patients undergoing PD (49, 50).