Deferred blood donors from 30 Australian Lifeblood donor centers (n= 6,039).
Incenter educational materials consisting of a brochure about referral and a ‘conversation guide’ prompting staff to be empathetic, plus a follow up email (Incenter Brochure plus Email group, n= 2,022).
Business-as-usual incenter process and a follow up email (Email only group, n= 2,028). Business-as-usual deferral process (Control group, n= 1,989).
Compared with donors in the Control group, donors in the Incenter Brochure plus Email group had increased odds of return at 3 months after their deferral ended (odds ratio (OR): 1.16). Subgroup analysis highlighted that novice (OR: 1.38) and established donors (OR: 1.36) had increased odds of return if they received the incenter materials. Donors who were deferred to maintain their well-being (OR: 1.28) and donors with a prior deferral history (OR: 1.55) had increased odds of return if they received the incenter materials. No significant differences were found between the Email Only and Control conditions.