Evidence mapPaperPMID 33565715Full record

Trial reportAmerican journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons2021

The effect of cholecalciferol supplementation on allograft function in incident kidney transplant recipients: A randomized controlled study.

Yohei Doi, Makoto Tsujita, Takayuki Hamano, Yoshitsugu Obi, Tomoko Namba-Hamano, Toshihide Tomosugi, Kenta Futamura, Manabu Okada, Takahisa Hiramitsu, Norihiko Goto and 5 more

Erratum issuedOpen access · hybridAbstract readRandomized Controlled Trial
In one paragraph

Trial report in American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
1.4field-weighted citation impact, top 20% 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

7 citing papers in PubMed, 1 synthesis or guideline pooled it, 10 citations in OpenAlex.

  1. Pooled it
  2. Cholecalciferol Supplementation Attenuates Bone Loss in Incident Kidney Transplant Recipients: A Prespecified Secondary Endpoint Analysis of a Randomized Controlled Trial.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2022
    Trial
  3. Article
  4. Vitamin D: are all compounds equal?Clinical kidney journal · 2025
    Article
  5. Article
  6. Article
  7. Erratum.American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons · 2021
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

15 authors at 6 institutions in 2 countries.

Yohei DoiDepartment of Nephrology, Osaka University Graduate School of Medicine, Suita, Japan.ORCID 0000-0002-5165-291X
Makoto TsujitaDepartment of Transplant Nephrology and Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan.ORCID 0000-0001-6927-6353
Takayuki HamanoDepartment of Nephrology, Osaka University Graduate School of Medicine, Suita, Japan.ORCID 0000-0002-2100-9106
Yoshitsugu ObiDivision of Nephrology, University of Tennessee Health Science Center, Memphis, Tennessee.ORCID 0000-0001-7032-4383
Tomoko Namba-HamanoDepartment of Nephrology, Osaka University Graduate School of Medicine, Suita, Japan.
Toshihide TomosugiDepartment of Transplant Nephrology and Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan.ORCID 0000-0001-8715-9134
Kenta FutamuraDepartment of Transplant Nephrology and Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan.
Manabu OkadaDepartment of Transplant Nephrology and Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan.ORCID 0000-0002-8446-7841
Takahisa HiramitsuDepartment of Transplant Nephrology and Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan.
Norihiko GotoDepartment of Transplant Nephrology and Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan.ORCID 0000-0003-4931-3203
Akira NishiyamaDepartment of Pharmacology, Faculty of Medicine, Kagawa University, Kagawa, Japan.
Asami TakedaDepartment of Nephrology, Nagoya Daini Red Cross Hospital, Nagoya, Japan.
Shunji NarumiDepartment of Transplant Nephrology and Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan.
Yoshihiko WataraiDepartment of Transplant Nephrology and Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan.
Yoshitaka IsakaDepartment of Nephrology, Osaka University Graduate School of Medicine, Suita, Japan.ORCID 0000-0002-0820-7167
Japanese Red Cross Nagoya Daini Hospital · JPThe University of Osaka · JPKagawa University · JPNagoya City University · JPNagoya Memorial Hospital · JPUniversity of Tennessee Health Science Center · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

It is unknown whether cholecalciferol supplementation improves allograft outcomes in kidney transplant recipients (KTRs). We conducted a single-center randomized, double-blind, placebo-controlled trial of daily 4000 IU cholecalciferol supplementation in KTRs at 1-month posttransplant. The primary endpoint was the change in eGFR from baseline to 12-month posttransplant. Secondary endpoints included severity of interstitial fibrosis and tubular atrophy (IFTA) at 12-month posttransplant and changes in urinary biomarkers. Of 193 randomized patients, 180 participants completed the study. Changes in eGFR were 1.2 mL/min/1.73 m

Indexed as

CholecalciferolKidney TransplantationAllograftsDietary SupplementsDouble-Blind MethodHumansCholecalciferolclinical research/practiceclinical trialkidney (allograft) function/dysfunctionkidney transplantation/nephrology

Identifiers

PMID33565715
PMCPMC8518814
OpenAlexW3126220985

What Socratic holds

Textmetadata
LicenceCC BY-NC
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 Socratic graph.