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Table 2 Associations between admission groups and bachelor completion and dropout rates unadjusted and adjusted for confounders

From: Bachelor completion and dropout rates of selected, rejected and lottery-admitted medical students in the Netherlands

    Unadjusted for confounders Adjusted for confounders
  N % of students B p OR CI min CI max B p OR CI min CI max
Primary outcome measures             
Bachelor degree in three years*     < 0.001      < 0.001    
 Selected (n = 416) 267 64,2% ref ref ref ref ref ref ref ref ref ref
 Rejected in step 2 (n = 57) 29 50,9% −0,55 0.05 0,58 0,33 1,01 −0,7 0.02 0,5 0,28 0,90
 Rejected in step 1 (n = 169) 97 57,4% −0,29 0.13 0,75 0,52 1,08 −0,25 0.22 0,78 0,53 1,16
 Withdrew from step 1 (n = 42) 18 42,9% −0,87 < 0.01 0,42 0,22 0,80 −0,83 0.02 0,44 0,22 0,87
 Applied to lottery only (n = 366) 189 51,6% −0,52 < 0.001 0,6 0,45 0,79 −0,53 < 0.001 0,59 0,43 0,80
Total (n = 1050) 600 57,1%           
Dropout in 6th year**     0.20      0.07    
 Selected (n = 416) 31 7,5% ref ref ref ref ref ref ref ref ref ref
 Rejected in step 2 (n = 57) 2 3,5% −0,8 0.29 2,21 0,52 9,51 −0,68 0.37 1,97 0,45 8,57
 Rejected in step 1 (n = 169) 14 8,3% 0,12 0.73 0,89 0,46 1,72 0,27 0.44 0,76 0,38 1,52
 Withdrew from step 1 (n = 42) 7 16,7% 0,91 0.05 0,4 0,17 0,98 1,14 0.02 0,32 0,13 0,81
 Applied to lottery only (n = 366) 34 9,3% 0,24 0.35 0,79 0,47 1,31 0,48 0.08 0,62 0,36 1,06
Total (n = 1050) 88 8,4%           
Secondary outcome measures             
Year-1 completion in one year***     0.12      0.16    
 Selected (n = 416) 168 40,4% ref ref ref ref ref ref ref ref ref ref
 Rejected in step 2 (n = 57) 26 45,6% 0,21 0.45 1,24 0,71 2,16 0,21 0.49 1,23 0,69 2,20
 Rejected in step 1 (n = 169) 63 37,3% −0,13 0.49 0,88 0,61 1,27 −0,05 0.79 0,95 0,64 1,40
 Withdrew from step 1 (n = 42) 9 21,4% −0,91 0.02 0,4 0,19 0,86 −0,85 0.04 0,43 0,19 0,94
 Applied to lottery only (n = 366) 153 41,8% 0,06 0.69 1,06 0,80 1,41 0,12 0.45 1,12 0,83 1,52
Total (n = 1050) 419 39,9%           
Bachelor degree in four years****     0.11      0.07    
 Selected (n = 416) 339 81,5% ref ref ref ref ref ref ref ref ref ref
 Rejected in step 2 (n = 57) 45 78,9% −0,16 0.65 0,85 0,43 1,69 −0,38 0.31 0,69 0,33 1,42
 Rejected in step 1 (n = 169) 136 80,5% −0,07 0.78 0,94 0,59 1,47 −0,11 0.66 0,9 0,55 1,46
 Withdrew from step 1 (n = 42) 30 71,4% −0,57 0.12 0,57 0,28 1,16 −0,68 0.08 0,51 0,24 1,09
 Applied to lottery only (n = 366) 272 74,3% −0,42 0.02 0,66 0,47 0,92 −0,49 0.01 0,61 0,42 0,89
Total (n = 1050) 822 78,3%           
  1. Significant differences at a p < 0.05 level are highlighted in bold text. Primary outcomes were tested using Holm-Bonferroni correction. Secondary outcomes were tested without correction for multiple comparisons because of the exploratory nature of these analyses
  2. *Adjusted for pu-GPA, age and gender
  3. **Adjusted for pu-GPA, age and cohort
  4. *** Adjusted for pu-GPA, age, gender and gender*pu-GPA
  5. ****Adjusted for pu-GPA, age, gender and cohort