Table 4. Factors associated with ⩾2 vertebral fractures.
| Odds ratio | 95% Confidence interval | P-value | |
|---|---|---|---|
| Univariate analysis | |||
| Age | 1.05 | 1–1.10 | 0.033 |
| Sex | 1.06 | 0.39–2.88 | 0.900 |
| BMI | 1.11 | 1.01–1.23 | 0.026 |
| Low BMD (T-score <−2.5) | 3.57 | 1.25–10.19 | 0.017 |
| IgM vs IgG and IgA | 1.87 | 0.68–5.09 | 0.220 |
| IgG vs IgM and IgA | 0.48 | 0.17–1.36 | 0.170 |
| IgA vs IgG and IgM | 1.15 | 0.24–5.42 | 0.860 |
| Lambda vs kappa | 4.65 | 1.64–13.23 | 0.004 |
| Multivariate analysis | |||
| Age | 1.05 | 0.29–3.13 | 0.086 |
| Sex | 0.86 | 0.26–2.80 | 0.800 |
| BMI | 1.15 | 1.03–1.29 | 0.014 |
| Low BMD | 4.11 | 1.20–14.08 | 0.025 |
| Heavy chain isotype | 1.59 | 0.63–4.00 | 0.320 |
| Lambda vs kappa | 6.09 | 1.77–20.92 | 0.004 |
Abbreviations: BMD, bone mineral density; BMI, body mass index; Ig, immunoglobulin.