Factors influencing daily blood donation attendance and their spatial heterogeneity at fixed donation sites in Nanjing
10.13303/j.cjbt.issn.1004-549x.2026.07.014
- VernacularTitle:南京市固定献血点献血人次的影响因素及其空间异质性分析
- Author:
Zhanghui LI
1
;
Wenbiao LIANG
1
;
Wenjia HU
1
;
Xian CHEN
1
;
Wenqing YUAN
1
;
Nizhen JIANG
1
Author Information
1. Jiangsu Blood Center, Nanjing 210042, China
- Publication Type:Journal Article
- Keywords:
fixed blood donation site;
blood donation attendance;
negative binomial mixedeffects model;
IRR;
blood management
- From:
Chinese Journal of Blood Transfusion
2026;39(7):908-916
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To analyze the time-related factors influencing daily blood donation attendance at fixed donation sites in Nanjing and the heterogeneity among sites, and to provide evidence for optimizing site layout and operational management. Methods: Based on daily attendance data from 17 fixed donation sites in Nanjing for the full year of 2025, matched with contemporaneous meteorological and air quality data, a two-stage negative binomial generalized linear mixed model (NB-GLMM) was constructed. In the second stage, site-level static characteristics (number of scenic spots, daily operating hours, number of shopping malls, public transport stops, hospitals, universities, and residential buildings) were additionally incorporated. Model comparison was performed using Akaike information criterion (AIC). Significance of random effects was tested by likelihood ratio test, and site-specific random effects were extracted using empirical Bayes estimation. Robustness of the results was verified through residual diagnostics and multiple sensitivity analyses. Results: The first-stage model showed that rainfall was associated with lower attendance (IRR=0.943, P<0.001); holidays were associated with higher attendance (IRR=1.162, P<0.001); Saturdays and Sundays showed higher attendance than Mondays, with the strongest association on Sundays (IRR=1.195, P<0.001). Temperature exhibited a non-linear relationship (linear term P=0.051, quadratic term P=0.036). The joint results of the linear and quadratic terms for temperature suggested a nonlinear relationship between attendance and temperature. After introducing static characteristics in the second stage, the number of scenic spots (IRR=1.372, P=0.008) and daily operating hours (IRR=1.823, P<0.001) were found to be positively associated with attendance, while the numbers of shopping malls, public transport stops, hospitals, universities, and residential buildings showed no significant effects. Conclusion: Daily blood donation attendance at fixed sites in Nanjing is influenced by multiple factors including weather, day of the week, holidays, and site surroundings. Substantial heterogeneity exists among different sites; extended operating hours and more nearby scenic spots are associated with increased attendance.
