Sensitivity, specificity, positive predictive value, and negative predictive value for motor signs in the lower limbs
| Focal lesion (n = 46) | Controls (n = 19) | Sensitivity (95% CI) | Specificity (95% CI) | PPV (95% CI) | NPV (95% CI) | |||
|---|---|---|---|---|---|---|---|---|
| Pos | Neg | Pos | Neg | |||||
| CI, confidence interval; Neg, test negative; NPV, negative predictive value; Pos, test positive; PPV, positive predictive value; UMN, upper motor neurone. | ||||||||
| UMN weakness | 9 | 37 | 0 | 19 | 0.20 (0.11 to 0.33) | 1.00 (0.83 to 1.00) | 1.00 (0.66 to 1.00) | 0.34 (0.22 to 0.46) |
| Impaired balance on one foot | 9 | 37 | 5 | 14 | 0.20 (0.11 to 0.33) | 0.74 (0.51 to 0.88) | 0.64 (0.35 to 0.89) | 0.27 (0.15 to 0.40) |
| Extensor plantar | 6 | 40 | 0 | 19 | 0.13 (0.06 to 0.26) | 1.00 (0.83 to 1.00) | 1.00 (0.54 to 1.00) | 0.32 (0.20 to 0.44) |
| Foot tapping | 5 | 41 | 2 | 17 | 0.11 (0.05 to 0.23) | 0.89 (0.69 to 0.97) | 0.71 (0.29 to 0.97) | 0.29 (0.18 to 0.41) |
| Spasticity | 4 | 42 | 0 | 19 | 0.09 (0.03 to 0.20) | 1.00 (0.83 to 1.00) | 1.00 (0.39 to 1.00) | 0.31 (0.20 to 0.43) |
| Foot shaking | 4 | 42 | 2 | 17 | 0.09 (0.03 to 0.20) | 0.89 (0.69 to 0.97) | 0.67 (0.22 to 0.97) | 0.29 (0.17 to 0.40) |