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Table 3 Prediction of academic success in development sample A and validation sample B; Target variable: SUCCESS (qualified for the first step of the medical exam after 2 years)

From: Dimensionality and predictive validity of the HAM-Nat, a test of natural sciences for medical school admission

   Development Sample A Validation Sample B Total sample
  Predictor variable 1 odds ratio p 95%-CI odds ratio p 95%-CI odds ratio p 95%-CI
1 HAM-Nat-raw 2.23 .001 1.41 3.54 1.80 .003 1.24 2.62 1.97 .000 1.47 2.63
2 HAM-Nat-uni 2.05 .001 1.33 3.17 1.70 .005 1.18 2.45 1.84 .000 1.39 2.43
3 HAM-Nat-biology 1.76 .002 1.22 2.53 1.65 .004 1.17 2.33 1.70 .000 1.32 2.18
4 HAM-Nat-physics 1.77 .005 1.19 2.65 1.54 .021 1.07 2.23 1.65 .000 1.26 2.16
5 HAM-Nat-chemistry 1.59 .019 1.08 2.35 1.40 .056 0.99 1.97 1.48 .003 1.15 1.91
6 HAM-Nat-BPC 2.23 .001 1.40 3.53 1.78 .003 1.22 2.59 1.95 .000 1.46 2.61
7 HAM-Nat-BPCw 2.25 .000 1.44 3.53 1.85 .002 1.26 2.72 2.01 .000 1.50 2.69
8 HAM-Nat-corrmax 3.02 .000 1.83 5.00 1.67 .005 1.16 2.40 2.12 .000 1.58 2.84
  1. Logistic regression
  2. 1 All predictor variables are z-transformed. Two persons differing in their scores by 1 standard deviation will differ in their odds to achieve success after two years by the odds ratio. For scale definitions see Table 2