Evidence map›Paper›PMID 23700345›Full record

ArticleThe Journal of nutrition2013

Low protein nitrogen appearance as a surrogate of low dietary protein intake is associated with higher all-cause mortality in maintenance hemodialysis patients.

Vanessa A Ravel, Miklos Z Molnar, Elani Streja, Jun Chul Kim, Alla Victoroff, Jennie Jing, Debbie Benner, Keith C Norris, Csaba P Kovesdy, Joel D Kopple and 1 more

Abstract readMulticenter Study
In one paragraph

Article in The Journal of nutrition, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

18 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Trial
  4. Article
  5. Pathophysiology and potential treatment of uremic sarcopenia.Kidney research and clinical practice · 2026
    Article
  6. Article
  7. Diabetes and Glucose Management in People on Hemodialysis.Diabetes spectrum : a publication of the American Diabetes Association · 2025
    Article
  8. Article
  9. Review
  10. Article
  11. Article
  12. Serum uric acid, protein intake and mortality in hemodialysis patients.Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association · 2017
    Article
  13. Review
  14. Dietary protein intake and chronic kidney disease.Current opinion in clinical nutrition and metabolic care · 2017
    Review
  15. Latest consensus and update on protein-energy wasting in chronic kidney disease.Current opinion in clinical nutrition and metabolic care · 2015
    Review
  16. Article
  17. Article
  18. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

11 authors.

Vanessa A RavelHarold Simmons Center for Chronic Disease Research & Epidemiology, University of California Irvine Medical Center, Irvine, CA, USA.
Miklos Z Molnar
Elani Streja
Jun Chul Kim
Alla Victoroff
Jennie Jing
Debbie Benner
Keith C Norris
Csaba P Kovesdy
Joel D Kopple
Kamyar Kalantar-Zadeh

Funding

UCLA Clinical and Translational Science InstituteUL1TR000124 · NCATS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI DUBINETT, STEVEN M. · 2012 to 2015
$57.0M
MALNUTRITION, DIET AND RACIAL DISPARITIES IN CKDK24DK091419 · NIDDK · UNIVERSITY OF CALIFORNIA-IRVINE · PI KALANTAR-ZADEH, KAMYAR · 2011 to 2020
$1.8M
Examining Racial and Cardiovascular Paradoxes in Chronic Kidney DiseaseR01DK078106 · NIDDK · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI KALANTAR-ZADEH, KAMYAR · 2007 to 2011
$1.1M
NCATS NIH HHS UL1 TR000124NIDDK NIH HHS K24 DK091419NIDDK NIH HHS R01 DK078106
6 · The paper itself

Abstract

To determine the association between all-cause mortality and dietary protein intake in patients with chronic kidney disease, we performed a large-scale, 8-y prospective cohort study in 98,489 maintenance hemodialysis patients from a multicenter dialysis care provider. Compared with the reference level (60 to <70 g/d), low protein nitrogen appearance (PNA) levels [<30 g/d, HR: 1.40 (95% CI: 1.30, 1.50); 30 to <40 g/d, HR: 1.33 (95% CI: 1.28, 1.39)] was associated with higher all-cause mortality, and high PNA levels [≥110 g/d, HR: 0.92 (95% CI: 0.88, 0.97); 100 to <110 g/d, HR: 0.87 (95% CI: 0.82, 0.91)] were associated with lower all-cause mortality in all analyses. This association was also found in subanalyses performed among racial and hypoalbuminemic groups. Hence, using PNA as a surrogate for protein intake, a low daily dietary protein intake is associated with increased risk of death in all hemodialysis patients. Whether the association between dietary protein intake and survival is causal or a consequence of anorexia secondary to protein-energy-wasting/inflammation or other factors should be explored in interventional trials.

Indexed as

Diet, Protein-RestrictedAgedAged, 80 and overBiomarkersDietary ProteinsFemaleFollow-Up StudiesHumansInflammationMaleMiddle AgedNitrogenProportional Hazards ModelsProspective StudiesRenal DialysisRenal Insufficiency, ChronicBiomarkersDietary ProteinsNitrogen

Identifiers

PMID23700345
PMCPMC3681544

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.