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Table 3 Logistic regression analysis of associations of groups, donor characteristics, and intervention status with re-donation among all participants

From: Effective methods for reactivating inactive blood donors: a stratified randomised controlled study

  OR (95% CI)
1 vs. 2 vs. 3
OR (95% CI)
1 vs. 2
OR (95% CI)
1 vs 3
OR (95% CI)
2 vs. 3
Group
 Telephone call-1 0.92 (0.76, 1.11) 1.10 (0.93, 1.31) 0.80 (0.55, 1.00)
 SMS-2 0.83 (0.66, 1.04) reference 1.17 (0.89, 1.55)
 Control-3 reference reference reference
Gender
 Male 1.14 (0.99, 1.31) 1.13 (0.96, 1.33) 1.10 (0.93, 1.30) 1.20 (1.02, 1.41)*
 Female reference reference reference reference
Age 1.03 (1.02, 1.04)** 1.03 (1.02, 1.04)** 1.03 (1.02, 1.04)** 1.03 (1.02, 1.04)**
Donation history 1.08 (1.06, 1.10)** 1.11 (1.08, 1.13)** 1.07 (1.05, 1.09)** 1.06 (1.04, 1.08)**
Status of interventiona
 Successful 1.56 (1.30, 1.88)** 1.56 (1.29, 1.88)** 2.01 (1.60, 2.55)** 1.02 (0.77, 1.35)
 Failed reference reference reference reference
  1. Coding: Telephone call = 1, SMS = 2, Control = 3; Male = 1, Female = 2; Status of intervention (Successful) =1, (Failed/Control) = 2
  2. a: Referred to those who accepted the interventions successfully; *: P < 0.05; **: P < 0.001