Evidence map›Paper›PMID 40933973›Full record

ArticleTurkish journal of medical sciences2025

Blood group profile of Türkiye with regional and demographic differences: a 23-year retrospective study.

Levent Sağdur, Aziz Karaca, Mustafa Nuri Günçikan, Mustafa Yilmaz, Kerem Kinik

Abstract readMulticenter Study
In one paragraph

Article in Turkish journal of medical sciences, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–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

1 citing paper in PubMed.

  1. Article
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

5 authors.

Levent SağdurDivision of Medical Management Directorate, Department of General Directorate of Blood Services, Turkish Red Crescent, Ankara, Turkiye.ORCID https://orcid.org/0000-0002-2420-4089
Aziz KaracaDepartment of Physiology, Faculty of Medicine, Recep Tayyip Erdoğan University, Rize, Turkiye.ORCID https://orcid.org/0000-0001-9408-5073
Mustafa Nuri GünçikanDivision of Medical Management Directorate, Department of General Directorate of Blood Services, Turkish Red Crescent, Ankara, Turkiye.ORCID https://orcid.org/0000-0003-3274-7574
Mustafa YilmazDivision of Medical Management Directorate, Department of General Directorate of Blood Services, Turkish Red Crescent, Ankara, Turkiye.ORCID https://orcid.org/0000-0003-3266-4752
Kerem KinikDepartment of Emergency Aid and Disaster Management, Faculty of Medicine, Health Sciences University, İstanbul, Turkiye.ORCID https://orcid.org/0000-0002-6913-5312

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background/aim: This study aimed to comprehensively analyze the distribution of ABO and Rh blood groups, as well as demographic characteristics and regional variations, using data from 9.5 million blood donors across Türkiye. Materials and methods: In this multicenter, retrospective, cross-sectional study, data were collected from 9,587,592 healthy, voluntary donors who donated to the Turkish Red Crescent between 1998 and 2021. Donors met the criteria of being 18-70 years old, weighing over 50 kg, with hemoglobin levels above 13.5 g/dL for males and 12.5 g/dL for females. The data were evaluated based on age, sex, education level, and geographic region. Results: The ABO blood group distribution was determined as follows: A (42.1%), O (34.0%), B (16.4%), and AB (7.5%). When analyzed together with the Rh factor, A Rh (+) was the most common (37.1%), while AB Rh (-) was the least common (0.9%). Regional analyses showed that A Rh (+) was highest in the Black Sea Region, whereas the Aegean Region had a notably high AB Rh (+) rate. The Marmara Region had the highest total number of donors, while Eastern Anatolia had the highest donation rate relative to its population. Demographically, 82.0% of donors were male; the 18-34 age group represented the most active segment (50.5%), and high school graduates had the highest donation rate (31.2%). Conclusion: This study provides a detailed profile of Türkiye's blood donors, filling a gap in national blood group data. The findings support optimizing transfusion services, improving blood supply management, and refining donor recruitment strategies. Regional and demographic disparities highlight the need for targeted awareness campaigns. Addressing sex imbalances and increasing participation from underrepresented groups can enhance sustainability. Additionally, these findings contribute valuable data for clinical applications, epidemiological studies, and future healthcare policy development.

Indexed as

ABO Blood-Group SystemBlood DonorsBlood Group AntigensRh-Hr Blood-Group SystemAdolescentAdultAgedCross-Sectional StudiesFemaleHumansMaleMiddle AgedRetrospective StudiesTurkeyYoung AdultABO Blood-Group SystemBlood Group AntigensRh-Hr Blood-Group SystemBlood stock managementdonor demographic analysisTurkish blood donorsTurkish blood groups

Identifiers

PMID40933973
PMCPMC12419050

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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.