Table 3. Reliability metrics for hip force measurements using a custom rig.
| Session 1 | Session 2 | ICC (95% CI) | SEM (95% CI) | SEM | MDC (95% CI) | MDC | |
|---|---|---|---|---|---|---|---|
| (N) | (N) | (N) | % | (N) | % | ||
| Abduction (n = 20) | 120 ± 26 | 124 ± 29 | 0.77 (0.51–0.90) | 13 (10–19) | 11 | 31 (26–35) | 25 |
| Adduction (n = 20) | 158 ± 33 | 159 ± 28 | 0.89 (0.71–0.96) | 10 (8–16) | 7 | 24 (23–26) | 15 |
| Extension (n = 18) | 287 ± 69 | 270 ± 66 | 0.90 (0.73–0.97) | 21 (16–33) | 8 | 49 (33–66) | 18 |
| Flexion (n = 17) | 234 ± 42 | 239 ± 51 | 0.80 (0.53–0.92) | 21 (16–32) | 9 | 49 (44–53) | 21 |
| Internal rotation (n = 20) | 171 ± 43 | 169 ± 39 | 0.81 (0.57–0.92) | 18 (14–27) | 11 | 42 (40–43) | 25 |
| External rotation (n = 20) | 125 ± 25 | 130 ± 29 | 0.77 (0.48–0.91) | 13 (10–19) | 10 | 30 (25–35) | 23 |
| E+AB (n = 20) | 208 ± 45 | 207 ± 52 | 0.86 (0.66–0.95) | 19 (14–29) | 10 | 45 (40–50) | 23 |
| E+ER (n = 20) | 211 ± 54 | 196 ± 54 | 0.86 (0.68–0.94) | 18 (13–27) | 9 | 42 (41–42) | 20 |
| E+AB+ER (n = 20) | 201 ± 55 | 197 ± 54 | 0.88 (0.70–0.95) | 20 (15–29) | 10 | 47 (32–62) | 23 |
Notes.
Values are mean ± standard deviation unless otherwise indicated.
- ICC
- intraclass correlation coefficient
- CI
- confidence interval
- SEM
- standard error of measurement
- MDC
- minimal detectable change
- N
- newton
- E
- extension
- AB
- abduction
- ER
- external rotation