14098 inactive donors were randomly divided into three groups according to age, sex, blood donation frequency,time of last donation and blood donation site, one group acted as the control group, one will be recruited by telephone recruitment on "need", and one will just be called for improvement suggestions of blood donor service.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
HEALTH_SERVICES_RESEARCH
Masking
DOUBLE
Enrollment
14,098
using telephone to recruit inactive donors on two different methods
Guangzhou Blood Center
Guangzhou, Guangdong, China
RECRUITINGdonate blood or not
rate of donation after recruitment
Time frame: 12 months
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