Table 1 Characteristics of study subjects at time of DXA
From: Factors associated with low bone density in patients referred for assessment of bone health
Characteristic | BMD Z-score ≤ - 2 | - 2 < BMD Z-score < -1 | BMD Z-score ≥ -1 | p | |
|---|---|---|---|---|---|
|  |  | N =102 | N = 101 | N = 101 |  |
Female | 56 (55%) | 63 (62%) | 76 (75%) | 0.009 | |
Age (years) | Mean ± SD | 13.6 ± 4.1 | 14.5 ± 4.3 | 15.5 ± 3.3 | 0.003 |
Race/Ethnicity | 0.397 | ||||
| Â | White | 88 (86%) | 79 (78%) | 83 (82%) | Â |
| Â | Black | 1 (1%) | 2 (2%) | 4 (4%) | Â |
| Â | Hispanic | 1 (1%) | 4 (4%) | 3 (3%) | Â |
| Â | Asian | 2 (2%) | 4 (4%) | 3 (3%) | Â |
| Â | Other | 6 (6%) | 2 (2%) | 3 (3%) | Â |
| Â | Not Documented | 4 (4%) | 10 (10%) | 5 (5%) | Â |
BMI | Mean ± SD | 18.8 ± 3.6 | 20.2 ± 4.4 | 23.1 ± 5.2 | <0.001 |
| Â | Underweight | 13 (15%) | 9 (9%) | 3 (3%) | 0.003 |
Healthy weight | 62 (72%) | 75 (76%) | 65 (67%) | Â | |
Overweight | 9 (11%) | 6 (6%) | 16 (17%) | Â | |
Obese | 2 (2%) | 9 (9%) | 13 (13%) | Â | |
BMI Z-score | Mean ± SD | -0.43 + 1.0 | -0.11 + 1.2 | 0.52 + 1.0 | <0.001 |
Height Z-score | Mean ± SD | -1.2 ± 1.5 | -0.7 ± 1.3 | -0.1 + 1.1 | <0.001 |
Hip Z-score | Mean ± SD | -2.18 ± 1.1 | -1.0 ± 0.6 | 0.45 ± 0.8 | <0.001 |
Spine Z-score | Mean ± SD | -2.4 ± 0.9 | -1.1 ± 0.6 | 0.30 ± 0.9 | <0.001 |