Table 3.
Patients' characteristics differences in relation to low BMD.
| Parameters | Low BMD at any site | p value | |
|---|---|---|---|
| Yes (n = 8) | No (n = 14) | ||
| Age (years) | 32.50 ± 6.590 | 38.79 ± 8.816 | 0.095 |
| BMI | 20.80 ± 3.76 | 25.21 ± 4.00 | 0.019∗ |
| Duration (years) | 7.87 (5–11) | 6.071 (3–8) | 0.082 |
| ESR (mm/hour) | 29.88 ± 24 | 42.57 ± 35.71 | 0.383 |
| CRP (mg/L) | 4.1 (1.7–26.8) | 5.15 (2–14) | 0.906 |
| ASDAS-ESR | 2.55 ± 1.04 | 2.77 ± 1.18 | 0.665 |
| ASDAS-CRP | 1.75 (1.1–3.9) | 2.05 (1.3–3.4) | 0.907 |
| Serum DKK-1 level (pg/dL) | 5640 ± 2064 | 6406 ± 1012 | 0.253 |
| mSASSS | 25.38 ± 3.159 | 25.79 ± 7.526 | 0.885 |
BMD: bone mineral density, BMI: body mass index, ESR: erythrocyte sedimentation rate, CRP: C-reactive protein, ASDAS: ankylosing spondylitis disease activity score, DKK-1: dickkopf-related protein 1, and mSASSS: modified stoke ankylosing spondylitis spinal score; ∗indicates a significant value (p ≤ 0.05).