Kaplan-Meier survival curves for death in hemodialysis patients with time since initiation of dialysis less than 90 days (upper panel; log rank test, chi square = 1.70; P = 0.427) and in patients with time since initiation of dialysis more than 90 days (lower panel; log rank test, chi square = 6.63; P = 0.036).

<p>Patients were stratified according to lowest, medium, and highest categories of the 7S domain of collagen type IV (P4NP_7S) plasma concentration.