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Table 7 Logistic regression for predictors of sitting the UMAT four or more times (N = 756) vs once only (N = 110,295) (Nagelkerke R Square 0.097)

From: Practice effects in medical school entrance testing with the undergraduate medicine and health sciences admission test (UMAT)

Predictor variable (reference group in brackets) N B S.E. Sig. Exp (B) 95% CI for exp (B)
Lower Upper
UMAT-1 Quartiles (4) 27584       
  UMAT-1 Quartile 1 27217 2.327 0.187 <0.001 10.24 7.11 14.77
  UMAT-1 Quartile 2 27603 2.037 0.179 <0.001 7.67 5.39 10.89
  UMAT-1 Quartile 3 28647 1.330 0.184 <0.001 3.78 2.64 5.43
UMAT-2 Quartiles (4) 27754       
  UMAT-2 Quartile 1 27255 0.320 0.132 0.016 1.38 1.06 1.79
  UMAT-2 Quartile 2 27555 0.146 0.133 0.273 1.16 0.89 1.50
  UMAT-2 Quartile 3 28487 0.164 0.135 0.222 1.18 0.91 1.53
UMAT-3 Quartiles (4) 29438       
  UMAT-3 Quartile 1 27321 -0.438 0.119 <0.001 0.645 0.51 0.82
  UMAT-3 Quartile 2 27517 -0.255 0.116 0.027 0.775 0.62 0.97
  UMAT-3 Quartile 3 26775 -0.022 0.112 0.841 0.98 0.79 1.22
Age (≤ 16 yr of age) 1175       
  17 yr 39603 -0.530 0.313 0.091 0.59 0.32 1.09
  18 yr 48714 -0.835 0.313 0.008 0.43 0.24 0.80
  19 yr 9191 -1.347 0.331 <0.001 0.26 0.14 0.50
  20 - 30 yr 10563 -0.831 0.326 0.011 0.436 0.23 0.83
  > 30 yr 1805 -0.935 0.428 0.029 0.393 0.17 0.91
Gender (Females) 64437       
  Males 46614 0.480 0.076 <0.001 1.617 1.39 1.88
Language spoken at home (English) 77800       
  Asian Languages 29175 0.376 0.082 <0.001 1.456 1.24 1.71
  European Languages 2246 0.022 0.274 0.936 1.022 0.60 1.75
  Other Languages 1830 0.490 0.212 0.021 1.633 1.08 2.48
School type (Government) 51344       
  Catholic 19967 0.031 0.106 0.769 1.032 0.84 1.27
  Independent 36891 -0.019 0.094 0.840 0.981 0.82 1.18
  Other 418 -0.456 0.259 0.078 0.634 0.38 1.05
  TAFE 2431 0.868 0.425 0.041 2.383 1.04 5.48
Country (Australia) 97839       
  New Zealand 12101 1.863 0.092 <0.001 6.441 5.38 7.71
  Other Country 1111 0.380 0.454 0.403 1.463 0.60 3.56
Aboriginal & Torres Strait Islander (ATSI) 110517       
  Non-ATSI 534 0.082 0.583 0.888 1.086 0.35 3.40
  1. (Significant P-values are boldfaced).
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