These groups showed a statistically significant difference in terms of factors such as baseline creatinine levels, 6-month creatinine, age, baseline PTH level, baseline P level, 6-month Kt/V value, number of hospitalizations, number of comorbidities, number of infection-free days, survival, two or more comorbidities, number of diabetics and number of hospitalized patients. This evidence concerns the gene PTH and infection.