Table 2 Association between serum ferritin levels and the prevalence of hand OA
Items | Quintiles of serum ferritin /(μg·L−1) | P-for-trend | ||||
---|---|---|---|---|---|---|
Q1 | Q2 | Q3 | Q4 | Q5 | ||
Hand (n)a | 495 | 496 | 491 | 494 | 487 | |
Median of serum ferritin levels/(μg·L−1) | 75.0 | 138.5 | 213.0 | 308.0 | 564.0 | |
Number of hand OA/% | 99 (20.0) | 105 (21.2) | 104 (21.2) | 119 (24.1) | 136 (27.9) | |
Crude OR (95% CI) | 1.00 (Ref) | 1.07 (0.74–1.56) | 1.07 (0.74–1.56) | 1.27 (0.88–1.84) | 1.55 (1.08–2.22) | 0.037 |
Age-sex-BMI adjusted OR (95% CI) | 1.00 (Ref) | 1.31 (0.89–1.93) | 1.23 (0.83–1.83) | 1.46 (0.97–2.22) | 1.69 (1.13–2.52) | 0.005 |