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Table 1 Cut-score yielded from the Borderline Regression and the EZ Methods

From: Standard setting made easy: validating the Equal Z-score (EZ) method for setting cut-score for clinical examinations

  Borderline Regression Method (year 6) Borderline Regression Method (year 7) EZ Method
day 1
EZ Method
day 2
EZ Method
day 3
EZ Method overall
CS 95%CI CS 95%CI CS Conf (%) CS Conf (%) CS Conf (%) CS Conf (%)
Station No.* L H   L H         
1–1 49.20 46.52 51.87 40.81 38.04 43.59 49.47 100.00 58.98 99.95 55.71 93.20 54.87 100.00
1–2 41.88 39.02 44.73 51.51 49.35 53.66 60.63 99.75 57.62 99.67 59.29 95.45 59.28 100.00
1–3 47.70 44.24 51.17 49.04 46.78 51.30 62.11 98.80 56.63 99.62 59.15 92.86 59.60 99.99
1–4 53.96 50.83 57.10 63.12 60.36 65.88 74.37 97.18 70.57 95.41 75.32 94.75 73.53 99.87
1–5 64.87 62.03 67.71 64.89 62.71 67.08 65.97 99.50 61.39 98.56 71.05 99.23 66.21 99.99
1–6 58.70 55.89 61.51 59.70 56.66 62.73 51.71 99.26 54.34 96.81 52.15 92.72 52.84 99.97
1–7 42.32 39.79 44.85 42.42 39.62 45.22 56.07 99.87 51.61 99.74 59.71 96.34 55.64 100.00
1–8 51.00 48.23 53.77 49.09 44.23 53.96 58.11 99.84 53.27 98.04 62.62 90.30 57.91 99.97
1–9 66.55 63.70 69.39 65.03 63.28 66.77 60.01 99.92 57.13 99.51 59.46 95.29 58.67 100.00
1–10 35.56 33.08 38.03 29.31 26.77 31.86 53.70 99.61 54.27 93.70 59.53 88.08 55.82 99.89
1–11 63.18 60.83 65.54 62.35 59.03 65.67 62.40 98.97 63.18 96.91 66.74 86.67 64.04 99.90
1–12 52.82 49.11 56.54 50.77 47.94 53.59 62.83 97.65 63.59 95.62 68.22 93.13 64.69 99.89
2–1 55.55 53.71 57.38 49.67 47.28 52.06 55.51 99.57 61.53 99.88 58.70 96.66 58.10 100.00
2–2 41.19 39.24 43.13 43.52 42.09 44.94 52.07 99.98 52.01 99.24 54.18 96.66 52.74 100.00
2–3 55.07 52.72 57.43 55.97 53.99 57.96 59.11 97.59 52.78 98.08 64.31 95.79 58.63 99.93
2–4 66.55 63.46 69.63 54.71 52.23 57.19 69.75 94.04 66.99 97.41 72.39 85.13 69.61 99.43
2–5 61.61 58.61 64.60 61.71 59.73 63.68 64.94 99.07 64.37 97.08 68.79 85.24 66.00 99.91
2–6 50.93 46.67 55.19 49.17 47.35 51.00 57.35 98.73 51.07 98.76 58.42 95.34 55.75 99.98
2–7 57.32 55.38 59.26 49.81 48.07 51.54 61.41 98.60 59.27 99.94 61.93 98.49 60.92 100.00
2–8 44.33 42.56 46.10 46.44 44.10 48.79 59.56 99.57 59.22 98.89 61.71 93.16 60.10 99.99
2–9 51.32 48.31 54.33 57.68 54.15 61.21 57.96 99.03 55.83 99.45 58.24 97.12 57.42 100.00
2–10 56.17 52.46 59.88 38.61 34.15 43.06 60.47 95.94 56.46 98.22 62.03 95.00 59.73 99.92
2–11 64.82 59.95 69.68 66.33 63.37 69.29 68.72 97.48 70.63 94.95 72.61 91.67 70.53 99.85
2–12 55.96 51.45 60.48 59.65 56.32 62.98 71.12 93.27 70.51 97.65 76.44 98.17 72.35 99.83
  1. *Stations 1–1 to 1–12 were of first mock OSCE, stations 2–1 to 2–12 were of second mock OSCE. First six stations were round 1 and latter six ones were round 2 in each mock OSCE