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Table 6 Two-by-two contingency tables for the UKCAT as a hypothetical screening test for failing to pass, at first sitting, at least 1 year at medical school

From: Predictive validity of the UKCAT for medical school undergraduate performance: a national prospective cohort study

Screening result Fail at least one exam at first sitting
Screen positive (low threshold: z ≤ –1) No Yes Total
 No 14,198 7808 22,006
 Yes 1152 1465 2617
 Total 15,350 9273 24,623
Screen positive (medium threshold: z ≤ 0) No Yes Total
 No 9560 4370 13,930
 Yes 5790 4903 10,693
 Total 15,350 9273 24,623
Screen positive (high threshold: z ≤ 1) No Yes Total
 No 2844 939 3783
 Yes 12,506 8334 20,840
 Total 15,350 9273 24,623
  1. Three thresholds are set for the standardised UKCAT score: low (z ≤ –1), medium (z ≤ 0), and high (z ≤ 1). Missing values for outcomes (including for unsuccessful applicants) were singly imputed, conditioned on relevant observed variables