Table 3 Comparison of subtest sensitivity for diagnosis of CTS
Criteria for abnormality | % Sensitivity of abnormal value | No. of abnormal hands | |
|---|---|---|---|
D4M-D4U (ms) | > 0.45 | 77 | 127 |
D2M-D5U (ms) | > 0.45 | 73.3 | 121 |
D2M/D5U SNAPa ratio (μv) | < 0.50 | 27 | 45 |
mSDL (ms) | > 3.5 | 75.8 | 125 |
mSNCV (m/s) | < 40 | 75.8 | 125 |
mSNAPa (μv) | < 8 | 38.2 | 63 |
mMDL (ms) | ≥ 3.8 | 68.5 | 113 |
mMNCV (m/s) | ≤ 52 | 20.6 | 34 |
mCMAPa (mv) | < 5 | 21.6 | 35 |
mTLI | < 0.33 | 70.3 | 116 |
M-U LD (ms) | > 1.0 | 66 | 109 |
M/U CMAPa ratio (mv) | < 0.35 | 15 | 25 |