Table 3.
Predictive performance of quadriceps muscle thickness, thigh circumference, and handgrip strength for fall injury
| Predictive values | Quadriceps muscle thickness (cutoff values of 3.37 cm in men and 3.54 cm in women) | Thigh circumference (cutoff values of 44.6 cm in men and 37.2 cm in women) | Handgrip strength (cutoff values of 23.3 g in men and 16.5 g in women) |
|---|---|---|---|
| Sensitivity, n (%) | 22/44 (50.0) | 33/44 (75.0) | 30/44 (68.2) |
| False positive rate, n (%) | 24/136 (17.6) | 68/136 (50.0) | 38/136 (27.9) |
| Specificity, n (%) | 112/136 (82.4) | 68/136 (50.0) | 98/136 (72.1) |
| False negative value, n (%) | 22/44 (50.0) | 11/44 (25.0) | 14/44 (31.8) |
| Positive predictive value, n (%) | 22/46 (47.8) | 33/101 (32.7) | 30/68 (44.1) |
| Negative predictive value, n (%) | 112/134 (83.6) | 69/82 (86.1) | 98/112 (87.5) |
| Positive likelihood ratio | 2.84 | 1.50 | 2.44 |
| Negative likelihood ratio | 0.61 | 0.50 | 0.44 |
Abbreviations: n number