Evidence map›Paper›PMID 21855188›Full record

ArticleAmerican journal of kidney diseases : the official journal of the National Kidney Foundation2011

Relation of sex and estrogen therapy to serum fibroblast growth factor 23, serum phosphorus, and urine phosphorus: the Heart and Soul Study.

Joachim H Ix, Michel Chonchol, Gail A Laughlin, Michael G Shlipak, Mary A Whooley

Open access · greenAbstract readComparative Study
In one paragraph

Article in American journal of kidney diseases : the official journal of the National Kidney Foundation, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed
3.1field-weighted citation impact, top 9% 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

44 citing papers in PubMed, 77 citations in OpenAlex.

  1. Trial
  2. Trial
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  6. Observational
  7. Vitamin D-Parathyroid Hormone-Fibroblast Growth Factor 23 Axis and Cardiac Remodeling.American journal of cardiovascular drugs : drugs, devices, and other interventions · 2025
    Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. An Expert Perspective on Phosphate Dysregulation With a Focus on Chronic Hypophosphatemia.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2022
    Article
  14. Article
  15. Article
  16. Serum fibroblast growth factor 23 (FGF-23): associations with hyperphosphatemia and clinical staging of feline chronic kidney disease.Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc · 2021
    Article
  17. Review
  18. Review
  19. Article
  20. Evaluation of Serum Level of FGF23 and 1,25(OH)International journal of general medicine · 2020
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

5 authors at 4 institutions in 1 country.

Joachim H IxDivision of Nephrology and Hypertension, Department of Medicine, University of California San Diego, San Diego, CA 92161, USA. joeix@ucsd.edu
Michel Chonchol
Gail A Laughlin
Michael G Shlipak
Mary A Whooley
San Francisco VA Medical Center · USUniversity of California, San Diego · USUniversity of Colorado Denver · USVA San Diego Healthcare System · US

Funding

Epidemiology of Depression and Heart Failure in AgingR01HL079235 · NHLBI · NORTHERN CALIFORNIA INSTITUTE RES &EDUC · PI WHOOLEY, MARY A · 2005 to 2009
$4.2M
Fetuin-A and Incident Cardiovascular Disease, Fracture, and DiabetesR01HL096851 · NHLBI · VETERANS MEDICAL RESEARCH FDN/SAN DIEGO · PI IX, JOACHIM H · 2009 to 2011
$885k
NHLBI NIH HHS R01 HL079235NHLBI NIH HHS R01 HL096851
6 · The paper itself

Abstract

backgroundMenopause is associated with urine phosphorus retention, which is mitigated by estrogen therapy. Fibroblast growth factor 23 (FGF-23) is a hormone originating from bone that regulates urine phosphorus excretion. Whether sex or estrogen therapy is associated with different FGF-23 levels is unknown. STUDY DESIGN &

settingCross-sectional study of ambulatory individuals with prevalent cardiovascular disease. PREDICTORS: Sex and, in women, use or nonuse of estrogen. OUTCOMES: Serum phosphorus, tubular maximum reabsorption of phosphorus indexed to glomerular filtration rate (TMP/GFR), and plasma FGF-23 concentrations.

resultsFor 987 participants, mean age was 67 ± 11 years, 182 (18%) were women, and 46 (25%) were using estrogen. Mean estimated GFR was 71 ± 23 (SD) mL/min/1.73 m(2). Compared with women who were not using estrogen, both women on estrogen therapy and men had significantly lower serum phosphorus concentrations, lower TMP/GFR values (indicating higher urine phosphorus excretion), and lower FGF-23 concentrations with adjustment for age, demographics, and kidney function (P < 0.001 for each). Mean FGF-23 levels were 68.7 (95% CI, 59.7-79.0) relative units (RU)/mL in non-estrogen-using women, 43.8 (95% CI, 41.2-46.5) RU/mL in men, and 45.1 (95% CI, 35.2-57.4) RU/mL in women using estrogen in adjusted analysis (P < 0.001). LIMITATIONS: Most participants were men. Estrogen therapy was not randomly assigned.

conclusionsOlder women who are not using estrogen have higher FGF-23 levels than either men or women using estrogen. In the context of prior literature, these data suggest that postmenopausal phosphorus retention may stimulate higher FGF-23 concentrations after menopause.

Indexed as

Estrogen Replacement TherapyAgedCardiovascular DiseasesCross-Sectional StudiesFemaleFibroblast Growth Factor-23Fibroblast Growth FactorsHumansMalePhosphorusSex FactorsFGF23 protein, humanFibroblast Growth Factor-23Fibroblast Growth FactorsPhosphorus

Identifiers

PMID21855188
PMCPMC3199317
OpenAlexW2065161529

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.