Table 3.
Neuromuscular, mental, and physical functioning of 5879 men aged 65 and over with and without incident rib fracture (MrOS Study). Values are numbers (percentages) unless stated otherwise
| Measure | No incident rib fracture (n=5753) | Incident rib fracture (n=126) | P value* |
|---|---|---|---|
| Neuromuscular function: | |||
| Inability to rise from chair without using arms 5 times | 123 (2.1) | 3 (2) | 0.8 |
| Inability to successfully complete any narrow walk trials | 525 (9.1) | 12 (10) | 0.9 |
| Grip strength† (quarters): | |||
| Unable, refused | 108 (1.9) | 1 (1) | 0.05 |
| 1: 7-32 kg | 1336 (23.2) | 42 (33) | |
| 2: 33-38 kg | 1403 (24.4) | 31 (25) | |
| 3: 39-43 kg | 1432 (24.9) | 21 (17) | |
| 4: 44-66 kg | 1473 (25.6) | 31 (26) | |
| Mean (SD) SF12 modified mental summary score | 55.6 (7.0) | 55.9 (7.2) | 0.6 |
| Mean (SD) SF12 modified physical summary score | 49.0 (10.2) | 48.1 (10.7) | 0.3 |
| Physical activity scale for the elderly score† (quarters): | |||
| 1: 0-99 | 1417 (24.6) | 32 (25) | 0.7 |
| 2: 100-141 | 1440 (25.0) | 29 (23) | |
| 3: 142-186 | 1451 (25.2) | 28 (22) | |
| 4: 187-486 | 1442 (25.1) | 37 (29) | |
| Daily sitting time (hours): | |||
| <1 | 168 (2.9) | 4 (3) | >0.99 |
| 1-2 | 1137 (19.8) | 24 (19) | |
| 2-4 | 2765 (48.1) | 59 (47) | |
| ≥4 | 1683 (29.3) | 39 (31) | |
| Difficulty with 5 IADLs (mean (SD) score) | 0.53 (1.45) | 0.86 (1.97) | 0.005 |
IADLs=instrumental activities of daily living.
*For differences in rib fracture case status by χ2 or Fisher’s exact test for categorical variables, two sided t tests for normally distributed continuous variables, and Wilcoxon rank-sum test for skewed continuous variables.
†Numbers in the “No incident rib fracture” column do not total to 5753 owing to a small number of missing values.