Proteinuria patterns and their association with subsequent end-stage renal disease in IgA nephropathy

James V. Donadio, Erik J. Bergstralh, Joseph Peter Grande, Diana M. Rademcher

Research output: Contribution to journalArticle

121 Citations (Scopus)

Abstract

Background. Proteinuria (UP) > 1.0 g/24 h at diagnosis is a well-known indicator of progressive renal disease in patients with IgA nephropathy (IgAN). To determine if persistent UP is a more sensitive marker for later progression of IgAN, the hypothesis was tested that the prior level and trend (slope) in UP for 1 year was better at predicting later end-stage renal disease (ESRD) (dialysis or transplant) than a current 24-h UP, serum creatinine (SC), SC slope, hypertension, or total glomerular histopathological score on index renal biopsy in an observational study of 154 high-risk patients enrolled in two clinical trials (IgAN 1, IgAN 2). Methods. Measurements of 24-h UP and SC were made at time 0, 6 weeks, 6 months and 1 year in all patients, who were then followed for an additional 5.76 years and 1.63 years in the two studies, respectively. The Cox proportional hazards model was used to identify predictors of ESRD following the 1-year visit. Results. Adjusting only for randomized treatment, nearly all UP variables (number of high readings, 1-year level, slopes), SC at 1 year, and SC trends (slopes) over the prior year were significantly associated with subsequent ESRD (all P values <0.05) in both studies. However, among the UP variables, the 1-year readings had the strongest association with ESRD in IgAN 1 (hazard ratio (HR), 95% CI, for a 1g increase: 1.5, 1.2,1.9), and the second strongest association (similar to UP trends) in IgAN 2 (1.4, 1.2,1.6). Males had lower rates of ESRD in both studies (IgAN 1 HR: 0.5, 0.2,1.2, P=0.11; IgAN 2 HR: 0.2, 0.1,0.6, P=0.002). In the multivariate analyses that examined all clinical and histological variables, 1-year levels of 24-h UP and SC, and female gender were independently associated with subsequent ESRD. Conclusion. In a high-risk patient with IgAN, the current 24-h UP and SC measurements are as good predictors of subsequent ESRD as UP and SC trends and levels over the prior year. Additionally, it appears that females have poorer outcomes than males.

Original languageEnglish (US)
Pages (from-to)1197-1203
Number of pages7
JournalNephrology Dialysis Transplantation
Volume17
Issue number7
StatePublished - 2002

Fingerprint

Proteinuria
Immunoglobulin A
Chronic Kidney Failure
Creatinine
Serum
Reading
Kidney
Proportional Hazards Models
Observational Studies
Renal Dialysis
Multivariate Analysis
Clinical Trials
Hypertension
Transplants
Biopsy

Keywords

  • IgA nephropathy
  • Prognosis
  • Proteinuria

ASJC Scopus subject areas

  • Nephrology
  • Transplantation

Cite this

Proteinuria patterns and their association with subsequent end-stage renal disease in IgA nephropathy. / Donadio, James V.; Bergstralh, Erik J.; Grande, Joseph Peter; Rademcher, Diana M.

In: Nephrology Dialysis Transplantation, Vol. 17, No. 7, 2002, p. 1197-1203.

Research output: Contribution to journalArticle

Donadio, James V. ; Bergstralh, Erik J. ; Grande, Joseph Peter ; Rademcher, Diana M. / Proteinuria patterns and their association with subsequent end-stage renal disease in IgA nephropathy. In: Nephrology Dialysis Transplantation. 2002 ; Vol. 17, No. 7. pp. 1197-1203.
@article{05502ac8d9d5451684371f4b8e6d8246,
title = "Proteinuria patterns and their association with subsequent end-stage renal disease in IgA nephropathy",
abstract = "Background. Proteinuria (UP) > 1.0 g/24 h at diagnosis is a well-known indicator of progressive renal disease in patients with IgA nephropathy (IgAN). To determine if persistent UP is a more sensitive marker for later progression of IgAN, the hypothesis was tested that the prior level and trend (slope) in UP for 1 year was better at predicting later end-stage renal disease (ESRD) (dialysis or transplant) than a current 24-h UP, serum creatinine (SC), SC slope, hypertension, or total glomerular histopathological score on index renal biopsy in an observational study of 154 high-risk patients enrolled in two clinical trials (IgAN 1, IgAN 2). Methods. Measurements of 24-h UP and SC were made at time 0, 6 weeks, 6 months and 1 year in all patients, who were then followed for an additional 5.76 years and 1.63 years in the two studies, respectively. The Cox proportional hazards model was used to identify predictors of ESRD following the 1-year visit. Results. Adjusting only for randomized treatment, nearly all UP variables (number of high readings, 1-year level, slopes), SC at 1 year, and SC trends (slopes) over the prior year were significantly associated with subsequent ESRD (all P values <0.05) in both studies. However, among the UP variables, the 1-year readings had the strongest association with ESRD in IgAN 1 (hazard ratio (HR), 95{\%} CI, for a 1g increase: 1.5, 1.2,1.9), and the second strongest association (similar to UP trends) in IgAN 2 (1.4, 1.2,1.6). Males had lower rates of ESRD in both studies (IgAN 1 HR: 0.5, 0.2,1.2, P=0.11; IgAN 2 HR: 0.2, 0.1,0.6, P=0.002). In the multivariate analyses that examined all clinical and histological variables, 1-year levels of 24-h UP and SC, and female gender were independently associated with subsequent ESRD. Conclusion. In a high-risk patient with IgAN, the current 24-h UP and SC measurements are as good predictors of subsequent ESRD as UP and SC trends and levels over the prior year. Additionally, it appears that females have poorer outcomes than males.",
keywords = "IgA nephropathy, Prognosis, Proteinuria",
author = "Donadio, {James V.} and Bergstralh, {Erik J.} and Grande, {Joseph Peter} and Rademcher, {Diana M.}",
year = "2002",
language = "English (US)",
volume = "17",
pages = "1197--1203",
journal = "Nephrology Dialysis Transplantation",
issn = "0931-0509",
publisher = "Oxford University Press",
number = "7",

}

TY - JOUR

T1 - Proteinuria patterns and their association with subsequent end-stage renal disease in IgA nephropathy

AU - Donadio, James V.

AU - Bergstralh, Erik J.

AU - Grande, Joseph Peter

AU - Rademcher, Diana M.

PY - 2002

Y1 - 2002

N2 - Background. Proteinuria (UP) > 1.0 g/24 h at diagnosis is a well-known indicator of progressive renal disease in patients with IgA nephropathy (IgAN). To determine if persistent UP is a more sensitive marker for later progression of IgAN, the hypothesis was tested that the prior level and trend (slope) in UP for 1 year was better at predicting later end-stage renal disease (ESRD) (dialysis or transplant) than a current 24-h UP, serum creatinine (SC), SC slope, hypertension, or total glomerular histopathological score on index renal biopsy in an observational study of 154 high-risk patients enrolled in two clinical trials (IgAN 1, IgAN 2). Methods. Measurements of 24-h UP and SC were made at time 0, 6 weeks, 6 months and 1 year in all patients, who were then followed for an additional 5.76 years and 1.63 years in the two studies, respectively. The Cox proportional hazards model was used to identify predictors of ESRD following the 1-year visit. Results. Adjusting only for randomized treatment, nearly all UP variables (number of high readings, 1-year level, slopes), SC at 1 year, and SC trends (slopes) over the prior year were significantly associated with subsequent ESRD (all P values <0.05) in both studies. However, among the UP variables, the 1-year readings had the strongest association with ESRD in IgAN 1 (hazard ratio (HR), 95% CI, for a 1g increase: 1.5, 1.2,1.9), and the second strongest association (similar to UP trends) in IgAN 2 (1.4, 1.2,1.6). Males had lower rates of ESRD in both studies (IgAN 1 HR: 0.5, 0.2,1.2, P=0.11; IgAN 2 HR: 0.2, 0.1,0.6, P=0.002). In the multivariate analyses that examined all clinical and histological variables, 1-year levels of 24-h UP and SC, and female gender were independently associated with subsequent ESRD. Conclusion. In a high-risk patient with IgAN, the current 24-h UP and SC measurements are as good predictors of subsequent ESRD as UP and SC trends and levels over the prior year. Additionally, it appears that females have poorer outcomes than males.

AB - Background. Proteinuria (UP) > 1.0 g/24 h at diagnosis is a well-known indicator of progressive renal disease in patients with IgA nephropathy (IgAN). To determine if persistent UP is a more sensitive marker for later progression of IgAN, the hypothesis was tested that the prior level and trend (slope) in UP for 1 year was better at predicting later end-stage renal disease (ESRD) (dialysis or transplant) than a current 24-h UP, serum creatinine (SC), SC slope, hypertension, or total glomerular histopathological score on index renal biopsy in an observational study of 154 high-risk patients enrolled in two clinical trials (IgAN 1, IgAN 2). Methods. Measurements of 24-h UP and SC were made at time 0, 6 weeks, 6 months and 1 year in all patients, who were then followed for an additional 5.76 years and 1.63 years in the two studies, respectively. The Cox proportional hazards model was used to identify predictors of ESRD following the 1-year visit. Results. Adjusting only for randomized treatment, nearly all UP variables (number of high readings, 1-year level, slopes), SC at 1 year, and SC trends (slopes) over the prior year were significantly associated with subsequent ESRD (all P values <0.05) in both studies. However, among the UP variables, the 1-year readings had the strongest association with ESRD in IgAN 1 (hazard ratio (HR), 95% CI, for a 1g increase: 1.5, 1.2,1.9), and the second strongest association (similar to UP trends) in IgAN 2 (1.4, 1.2,1.6). Males had lower rates of ESRD in both studies (IgAN 1 HR: 0.5, 0.2,1.2, P=0.11; IgAN 2 HR: 0.2, 0.1,0.6, P=0.002). In the multivariate analyses that examined all clinical and histological variables, 1-year levels of 24-h UP and SC, and female gender were independently associated with subsequent ESRD. Conclusion. In a high-risk patient with IgAN, the current 24-h UP and SC measurements are as good predictors of subsequent ESRD as UP and SC trends and levels over the prior year. Additionally, it appears that females have poorer outcomes than males.

KW - IgA nephropathy

KW - Prognosis

KW - Proteinuria

UR - http://www.scopus.com/inward/record.url?scp=0036020914&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036020914&partnerID=8YFLogxK

M3 - Article

VL - 17

SP - 1197

EP - 1203

JO - Nephrology Dialysis Transplantation

JF - Nephrology Dialysis Transplantation

SN - 0931-0509

IS - 7

ER -