Can American College of Radiology in-training examination scores be used to predict Canadian radiology licensing examination results? A retrospective study

Table 1 Mean ACR score difference and correlation between ACR scores and RCPSC exam results between those that passed and those that failed their RCPSC exams (CI = Confidence Intervals)

Year of training*	RCPSC exam result	N†	Mean ACR score [95% CI]	Mean ACR difference [95% CI]	Biserial r_b
PGY2	Passed	50	46.08 [37.97, 54.19]	34.33 [23.75, 44.91] (P<0.0005) ‡	0.640
	Failed	8	11.75 [3.99, 19.51]
PGY3	Passed	56	51.48 [43.47, 59.49]	35.70 [24.33, 47.07] (P<0.0005)	0.635
	Failed	9	15.78 [6.86, 24.70]
PGY4	Passed	49	56.57 [48.59, 64.55]	29.32 [12.67, 45.97] (P=0.002)	0.563
	Failed	8	27.25 [11.67, 42.83]
PGY5	Passed	46	54.46 [45.67, 63.24]	36.96 [24.04, 49.87] (P<0.0005)	0.661
	Failed	8	17.50 [6.93, 28.07]
Average	Passed	57	51.42 [44.60, 58.24]	33.75 [24.42, 43.08] (P<0.0005)	0.692
	Failed	10	17.67 [10.68, 24.65]

RCPSC = Royal College of Physicians and Surgeons of Canada, ACR = American College of Radiology, CI = confidence interval, PGY = post graduate year.
*PGY2 is the first year of 4 consecutive years of radiology-specific specialty training.
†Missing ACR values were omitted from analysis therefore the sample size varied in each year.
‡ Statistical significance at P ≤ 0.05.

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