Table 1.
Characteristics of hip fracture patients’ false-negative hip fracture ascertainment compared to those with true positive ascertainmentc
| Predictor | True positives (N=527) | False negatives (N=120) | P value |
|---|---|---|---|
| 6-m walk speed tertiles, (m/s, %) | |||
| <0.79 | 31.6 | 31.4 | 0.751 |
| 0.79–0.96 | 35.3 | 32.2 | |
| ≥0.97 | 33.1 | 36.4 | |
| MMSE scorea, 0–26, mean (SD) | 24.5 (1.7) | 24.3 (1.7) | 0.190 |
| Trails B score, 0–180 (s), mean (SD) | 144.1 (73.7) | 142.0 (72.9) | 0.780 |
| Geriatric Depression Scale scoreb, mean (SD) | 1.73 (2.19) | 1.70 (2.08) | 0.968 |
| Lives with others vs. lives alone (%) | 48.1 | 60.2 | 0.021 |
| Body mass index (kg/cm2), mean (SD) | 25.1 (4.2) | 25.6 (4.4) | 0.217 |
| Height at age 25a (cm) mean (SD) | 163.1 (5.9) | 162.6 (5.8) | 0.386 |
| Clinical fractures since age 50 (%) | 49.7 | 45.0 | 0.351 |
| Self-reported health status (very poor/poor/fair vs. good/excellent)a (%) | 14.4 | 18.3 | 0.281 |
| Any IADL impairment (%) | 42.5 | 39.5 | 0.554 |
| Femoral neck BMD (g/cm2) mean (SD) | 0.591 (0.090) | 0.611 (0.093) | 0.028 |
| Depth perception (lowest quartile vs. top three quartiles)a (%) | 23.8 | 27.4 | 0.417 |
All measurements were obtained at SOF exam 2, unless otherwise noted
MMSE Mini-Mental Status Exam, IADL Instrumental Activities of Daily Living, BMD bone mineral density
Recorded at SOF exam 1
Skewed normal distribution, Kruskall–Wallis test performed to test differences
For the following variables, there was no difference in the frequency distributions between those with true-positive hip fracture ascertainment and those with false-negative hip fracture ascertainment; age group (<80 years, 80–84 years, ≥85 years), p value=0.208; current smoking status, p value=0.329; maternal history of hip fracture, p value=0.606; or proportion able to stand without use of the arms, p value=0.824. Values are not reported in the table due to some cell sizes being less than 11