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Table 4 Results of US and MR imaging for detecting knee cartilage defects of each grade

From: A novel ultrasound scanning approach for evaluating femoral cartilage defects of the knee: comparison with routine magnetic resonance imaging

Grade US MRI
Radiologist 1 Radiologist 2
0 92.9 (78/84) (0.317) 90.5 (76/84) (0.083) 94.0 (79/84)
1 0.0 (0/20) (0.025) 0.0 (0/20) (0.025) 25.0 (5/20)
2 33.3 (10/30) (0.083) 40.0 (12/30) (0.317) 43.3 (13/30)
3 55.3 (21/38) (0.014) 65.8 (25/38) (0.157) 71.1 (27/38)
4 73.9 (17/23) (0.083) 82.6 (19/23) (0.317) 87.0 (20/23)
  1. Data are the percentages, followed by the raw data; numbers in parentheses are the P values in comparison with MRI (McNemar test)