Abstract
From January 1981 to July 1988, the U.S. National CAPD Registry followed 23,771 patients on CAPD or CCPD for 3 months or more in 498 participating centers. Of these patients, 281 were deemed to have enough recovery of renal function to do without dialysis for at least 3 months. The median time on PD before recovery was 126 days in 138 patients treated only by PD from the start of dialysis. The median time to recovery in 106 patients was 238 days from the start of any chronic dialysis. A Cox model analysis revealed significantly (p60 years of age compared to a younger group (rr=1.72). However, patients >60 and <21 experienced similar recovery rates. Reduced chances (p<0.05) for recovery were associated with diabetic glomerulosclerosis (rr=0.25) and polycystic kidney disease (rr=0.13). These findings show that renal function recovery rates in chronic hemodialysis and chronic peritoneal dialysis cannot be properly compared unless all risk factors (favoring or against recovery) are balanced, as in a prospective randomized trial.

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