Table 1.

Predictive values for the detection of full-thickness rotator cuff tears over three training periods of 70 scans each.

Training period	Sensitivity	Specificity	PPV	NPV	Accuracy
First	0.86	0.92	0.82	0.94	0.90
Second	0.91	0.96	0.91	0.96	0.94
Third	0.95	0.98	0.95	0.98	0.97
(p-value first versus third)	0.073	0.095	0.019	0.204	0.089

Statistical comparison of values attained in the first and third training period is represented in the bottom row. NPV, negative predictive value; PPV, positive predictive value.