Evidence map›Paper›PMID 41872355›Full record

ArticleSupportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer2026

Serum vitamin d levels predict hospital-free days in outpatient allogeneic stem cell transplantation survivors: implications for long-term health outcomes.

Kan-Ichi Iwama, Marina Matsui, Daisuke Shinoda, Masao Tsukada, Koichi Kajiwara, Yasuji Kozai

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Article in Supportive care in cancer : official journal of the Multinational Association of Supportive Care in Cancer, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Kan-Ichi IwamaDepartment of Hematology, Tokyo Metropolitan Tama Medical Center, 2-8-29 Musashidai, Fuchu City, Tokyo, 183-8524, Japan. kanichi_iwama@tmhp.jp.ORCID http://orcid.org/0009-0005-3997-4368
Marina MatsuiDepartment of Hematology, Tokyo Metropolitan Tama Medical Center, 2-8-29 Musashidai, Fuchu City, Tokyo, 183-8524, Japan.
Daisuke ShinodaDepartment of Hematology, Tokyo Metropolitan Tama Medical Center, 2-8-29 Musashidai, Fuchu City, Tokyo, 183-8524, Japan.
Masao TsukadaDepartment of Hematology, Tokyo Metropolitan Tama Medical Center, 2-8-29 Musashidai, Fuchu City, Tokyo, 183-8524, Japan.
Koichi KajiwaraDepartment of Hematology, Tokyo Metropolitan Tama Medical Center, 2-8-29 Musashidai, Fuchu City, Tokyo, 183-8524, Japan.
Yasuji KozaiDepartment of Hematology, Tokyo Metropolitan Tama Medical Center, 2-8-29 Musashidai, Fuchu City, Tokyo, 183-8524, Japan.

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No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeOptimizing long-term health outcomes and minimizing healthcare utilization are crucial for outpatient allogeneic hematopoietic stem cell transplantation (allo-HSCT) survivors. Hospital-free days (HFDs) serve as patient-centered indicators of healthcare burden and physical stability. Although vitamin D (25(OH)D) has immunomodulatory effects, its relationship with HFDs in survivors in remission remains unclear. We investigated the predictive value of serum 25(OH)D levels for HFDs and hospitalization-free survival (HFS).

methodsThis prospective single-center study enrolled 51 adult allo-HSCT survivors in complete remission who visited outpatient clinics. Serum 25(OH)D levels were measured. The primary outcome was HFDs (days alive and out-of-hospital) over 3 years, categorized into four ordered groups. The secondary outcome was HFS (time to death, relapse, or hospitalization). Multivariable ordinal logistic (HFDs) and Cox proportional hazards (HFS) regression analyses were performed, adjusting for confounders using stepwise selection.

resultsThe median patient age was 67.7 years. In multivariable analysis, higher serum 25(OH)D levels significantly predicted better HFD outcomes (adjusted odds ratio = 1.13 per ng/mL; 95% CI = 1.04-1.24; p = 0.001). Higher 25(OH)D levels also independently predicted improved HFS (adjusted hazard ratio = 0.89 per ng/mL; 95% CI = 0.82-0.95; p = 0.001). The Kaplan-Meier analysis confirmed better HFS in patients with 25(OH)D levels above the median (log-rank p = 0.029). Chronic graft-versus-host disease and time since SCT were associated with 25(OH)D levels.

conclusionIn outpatient allo-HSCT survivors, higher serum 25(OH)D levels independently predicted HFDs, suggesting reduced healthcare burden and improved HFS. Vitamin D status warrants further investigation as a potential modifiable target for enhancing long-term HSCT outcomes.

Indexed as

Hematopoietic Stem Cell TransplantationHospitalizationVitamin DAdultAgedFemaleHumansMaleMiddle AgedMultivariate AnalysisOutpatientsProportional Hazards ModelsProspective StudiesSurvivorsTransplantation, HomologousVitamin DGraft vs. host diseaseHematopoietic stem cell transplantationHospitalizationQuality of lifeVitamin D

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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.