Table 4.
Diagnostic performance of the experienced and inexperienced readers for the detection of subchondral cysts using MRI reading by the expert reader as the reference standard
| Frequency (n=40) | Sensitivity | Specificity | Accuracy | |||
|---|---|---|---|---|---|---|
| Experienced reader | LF | L | 1 (3) | 0.14 (1/7) | 1.00 (33/33) | 0.85 (34/40) |
| R | 4 (10) | 0.33 (2/6) | 0.94 (32/34) | 0.85 (34/40) | ||
| MF | L | 3 (8) | 0.43 (3/7) | 1.00 (33/33) | 0.90 (36/40) | |
| R | 4 (10) | 0.50 (2/4) | 0.94 (34/36) | 0.90 (36/40) | ||
| LT | L | 4 (10) | 0.38 (3/8) | 0.97 (31/32) | 0.85 (34/40) | |
| R | 4 (10) | 1.00 (2/2) | 0.95 (36/38) | 0.95 (38/40) | ||
| MT | L | 4 (10) | 0.44 (4/9) | 1.00 (31/31) | 0.88 (35/40) | |
| R | 4 (10) | 0.50 (4/8) | 1.00 (32/32) | 0.90 (36/40) | ||
| Inexperienced reader | LF | L | 1 (3) | 0.14 (1/7) | 1.00 (33/33) | 0.85 (34/40) |
| R | 3 (8) | 0.33 (2/6) | 0.97 (33/34) | 0.88 (35/40) | ||
| MF | L | 4 (10) | 0.57 (4/7) | 1.00 (33/33) | 0.93 (37/40) | |
| R | 2 (5) | 0.25 (1/4) | 0.97 (35/36) | 0.90 (36/40) | ||
| LT | L | 6 (15) | 0.63 (5/8) | 0.97 (31/32) | 0.90 (36/40) | |
| R | 7 (18) | 1.00 (2/2) | 0.87 (33/38) | 0.88 (35/40) | ||
| MT | L | 6 (15) | 0.56 (5/9) | 0.97 (30/31) | 0.88 (35/40) | |
| R | 8 (20) | 0.63 (5/8) | 0.91 (29/32) | 0.85 (34/40) |
Frequency is given as n (%).
LF, lateral femur; L, left; R, right; MF, medial femur; LT, lateral tibia; MT, medial tibia.