Evidence map›Paper›PMID 26463139›Full record

ArticleAmerican journal of kidney diseases : the official journal of the National Kidney Foundation2016

Total, Dietary, and Supplemental Vitamin C Intake and Risk of Incident Kidney Stones.

Pietro Manuel Ferraro, Gary C Curhan, Giovanni Gambaro, Eric N Taylor

Open access · greenAbstract read
In one paragraph

Article in American journal of kidney diseases : the official journal of the National Kidney Foundation, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 81 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
81citing papers in PubMed, 4 pooled it
7.4field-weighted citation impact, top 2% of its field
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

81 citing papers in PubMed, 4 syntheses or guidelines pooled it, 193 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Guideline
  4. Guideline
  5. Potassium Citrate is Better in Reducing Salt and Increasing Urine pH than Oral Intake of Lemonade: A Cross-Over Study.Medical science monitor : international medical journal of experimental and clinical research · 2018
    Trial
  6. Review
  7. Urolithiasis in patients with cancer.Nature reviews. Urology · 2026
    Review
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  9. Article
  10. Review
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  15. Article
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  19. Article
  20. Dietary Guidelines Post Kidney Transplant: Is This the Missing Link in Recovery and Graft Survival?Transplant international : official journal of the European Society for Organ Transplantation · 2025
    Review

21 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors at 2 institutions in 2 countries.

Pietro Manuel FerraroDivision of Nephrology, Department of Medical Sciences, Columbus-Gemelli University Hospital, Catholic University of the Sacred Heart, Rome, Italy; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA. Electronic address: manuel.ferraro@channing.harvard.edu.
Gary C CurhanChanning Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.
Giovanni GambaroDivision of Nephrology, Department of Medical Sciences, Columbus-Gemelli University Hospital, Catholic University of the Sacred Heart, Rome, Italy.
Eric N TaylorChanning Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA; Division of Nephrology and Transplantation, Maine Medical Center, Portland, ME.
Brigham and Women's Hospital · USUniversità Cattolica del Sacro Cuore · IT

Funding

Life Course Cancer Epidemiology Cohort in WomenU01CA176726 · NCI · HARVARD UNIVERSITY D/B/A HARVARD SCHOOL OF PUBLIC HEALTH · PI ELIASSEN, A. HEATHER, WILLETT, WALTER C. · 2018 to 2025
$22.4M
Long Term Multidisciplinary Study of Cancer in Women: The Nurses Health StudyUM1CA186107 · NCI · BRIGHAM AND WOMEN'S HOSPITAL · PI ELIASSEN, A. HEATHER, STAMPFER, MEIR · 2014 to 2023
$22.3M
Cancer Epidemiology Cohort in Male Health ProfessionalsU01CA167552 · NCI · HARVARD UNIVERSITY D/B/A HARVARD SCHOOL OF PUBLIC HEALTH · PI Lorelei Mucci, Walter C. Willett · 2017 to 2026
$17.0M
Life Course Cancer Epidemiology Cohort in WomenUM1CA176726 · NCI · HARVARD SCHOOL OF PUBLIC HEALTH · PI WILLETT, WALTER C. · 2013 to 2017
$15.7M
Cancer Epidemiology Cohort in Male Health ProfessionalsUM1CA167552 · NCI · HARVARD SCHOOL OF PUBLIC HEALTH · PI WILLETT, WALTER C. · 2012 to 2016
$11.5M
Sex-related differences in incidence rates of nephrolithiasisK24DK091417 · NIDDK · BRIGHAM AND WOMEN'S HOSPITAL · PI CURHAN, GARY C. · 2011 to 2020
$1.5M
Identifying Risk Factors and Improving Risk Assessment for NephrolithiasisR01DK094910 · NIDDK · BRIGHAM AND WOMEN'S HOSPITAL · PI TAYLOR, ERIC N · 2013 to 2016
$1.1M
NCI NIH HHS CA167552NCI NIH HHS CA176726NCI NIH HHS CA186107NCI NIH HHS U01 CA167552NCI NIH HHS U01 CA176726NCI NIH HHS UM1 CA167552NCI NIH HHS UM1 CA176726NCI NIH HHS UM1 CA186107NIDDK NIH HHS DK094910NIDDK NIH HHS DK91417NIDDK NIH HHS K24 DK091417NIDDK NIH HHS R01 DK094910
6 · The paper itself

Abstract

backgroundPrevious studies of vitamin C and kidney stones were conducted mostly in men and either reported disparate results for supplemental and dietary vitamin C or did not examine dietary vitamin C. STUDY

designProspective cohort analysis. SETTING &

participants156,735 women in the Nurses' Health Study (NHS) I and II and 40,536 men in the Health Professionals Follow-up Study (HPFS). PREDICTOR: Total, dietary, and supplemental vitamin C intake, adjusted for age, body mass index, thiazide use, and dietary factors. OUTCOMES: Incident kidney stones.

resultsDuring a median follow-up of 11.3 to 11.7 years, 6,245 incident kidney stones were identified. After multivariable adjustment, total vitamin C intake (<90 [reference], 90-249, 250-499, 500-999, and ≥1,000mg/d) was not significantly associated with risk for kidney stones among women, but was among men (HRs of 1.00 [reference], 1.19 [95% CI, 0.99-1.46], 1.15 [95% CI, 0.93-1.42], 1.29 [95% CI, 1.04-1.60], and 1.43 [95% CI, 1.15-1.79], respectively; P for trend = 0.005). Median total vitamin C intake for the 500- to 999-mg/d category was ∼700mg/d. Supplemental vitamin C intake (no use [reference], <500, 500-999, and ≥1,000mg/d) was not significantly associated with risk for kidney stones among women, but was among men (HR, 1.19 [95% CI, 1.01-1.40] for ≥1,000mg/d; P for trend = 0.001). Dietary vitamin C intake was not associated with stones among men or women, although few participants had dietary intakes > 700mg/d. LIMITATIONS: Nutrient intakes derived from food-frequency questionnaires, lack of data on stone composition for all cases.

conclusionsTotal and supplemental vitamin C intake was significantly associated with higher risk for incident kidney stones in men, but not in women.

Indexed as

Ascorbic AcidKidney CalculiAdultAgedBody Mass IndexDietDietary SupplementsFemaleFollow-Up StudiesHumansItalyMaleMiddle AgedProspective StudiesRisk AssessmentRisk FactorsAscorbic AcidVitaminsascorbic acidcalcium oxalatedietfood-frequency questionnaire (FFQ)gender differenceincident kidney stoneKidney diseasekidney stone formationnutritionrisk factorsupplementsurinary oxalate excretionurolithiasisvitamin C

Identifiers

PMID26463139
PMCPMC4769668
OpenAlexW1952455077

What OpenQuestion holds

Textmetadata
LicenceTDM
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.