Table 1.
μCharacteristics Associated with Meeting the Vitamin D Recommended Adequate Intake (RAI)* at Baseline
| Characteristic | All subjects (N=482) | Does Not Meet RAI (n=347) | Meets RAI (n=135) | P-Value |
|---|---|---|---|---|
| λAge, mean±SD | 79.2±7.6 | 80.3±6.9 | 76.4±8.4 | <0.001 |
| Female, n (%) | 361 (74.9) | 244 (70.3) | 117 (86.7) | .003 |
| Caucasian race, n (%) | 469 (97.3) | 339 (97.7) | 130 (96.3) | .57 |
| Number of concomitant medications, mean±SD | 5.5±3.3 | 5.5±3.4 | 5.4±3.0 | .88 |
| Homebound, n (%)≅ | 59 (12.2) | 46 (13.3) | 13 (9.6) | .35 |
| Falls in past year, mean±SD | 2.6±3.5 | 2.6±3.7 | 2.6±2.6 | .81 |
| Fall with injury, n (%) | 206 (42.7) | 140 (40.3) | 66 (48.9) | .11 |
| Prior adult fracture, n (%) | 190 (39.4) | 127 (36.6) | 63 (46.7) | .05 |
| Prior hip fracture, n (%) | 42 (8.7) | 28 (8.1) | 14 (10.4) | .53 |
| Regular exercise, n (%)⊥ | 265 (55.0) | 187 (53.9) | 78 (57.8) | .50 |
| Health related quality of life according to the Medical Outcomes Study 12-item Short Form Survey, mean±SD | ||||
| νPhysical Component Summary | 39.6±10.3 | 39.0±10.1 | 41.1±10.7 | .04 |
| νMental Component Summary | 53.6±9.5 | 53.5±9.6 | 53.7±9.3 | .82 |
| Education, years, mean±SD | 14.3±3.9 | 14.2±3.9 | 14.4±4.0 | .71 |
| Calcium supplement use, n (%) | 326 (67.6) | 199 (57.3) | 127 (94.1) | <0.001 |
*
The RAI is 400λIU/d for people aged 51 to 70 and 600λIU/d for people aged 70 and older.
≅
Unable to walk outside and shop for groceries.
⊥
Walking for exercise in the previous 2 weeks.
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SD=standard deviation.