Table 4 Subgroup regression analysis between BMI (kg/m2) with ferritin (ng/ml)
Characteristic | Model 1 OR(95%CI) | Model 2 OR(95%CI) | Model 3 OR(95%CI) | P for interaction* |
|---|---|---|---|---|
Stratified by gender | Â | Â | Â | 0.22 |
 Male | 1.87 (0.90, 2.84) | 1.86 (0.89, 2.83) | 1.58 (0.53, 2.62) |  |
 Female | 0.42 (− 0.03, 0.87) | 0.19 (− 0.25, 0.62) | − 0.13 (− 0.61, 0.36) |  |
Stratified by age (years) | Â | Â | Â | 0.13 |
 20–39 | 1.42 (0.76, 2.09) | 1.67 (1.10, 2.24) | 0.58 (− 0.05, 1.20) |  |
 40–59 | 0.30 (− 0.66, 1.25) | 0.39 (− 0.50, 1.29) | 0.70 (-0.27, 1.67) |  |
 60–80 | − 0.93 (− 2.00, 0.13) | − 0.59 (− 1.64, 0.46) | − 0.68 (− 1.83, 0.48) |  |
Stratified by race | Â | Â | Â | 0.40 |
 White | 0.81 (0.02, 1.61) | 0.89 (0.14, 1.63) | 0.89 (0.07, 1.71) |  |
 Black | 0.02 (− 0.93, 0.96) | 1.04 (0.16, 1.93) | 0.50 (− 0.44, 1.45) |  |
 Other race | 0.71 (− 0.28, 1.70) | 0.36 (− 0.55, 1.27) | 0.03 (− 0.95, 1.01) |  |
Stratified by hypertension | Â | Â | Â | 0.26 |
 Yes | 1.08 (0.49, 1.67) | 1.25 (0.72, 1.77) | 0.71 (0.16, 1.26) |  |
 No | − 1.38 (− 2.35, − 0.41) | − 0.70 (− 1.67, 0.26) | 0.10 (− 0.94, 1.14) |  |
Stratified by diabetes | Â | Â | Â | 0.99 |
 Yes | 1.83 (− 0.56, 4.23) | 2.59 (0.18, 4.99) | 0.99 (− 1.60, 3.58) |  |
 No | 0.54 (− 0.02, 1.11) | 0.70 (0.18, 1.22) | 0.46 (− 0.11, 1.03) |  |
 Borderline | − 0.41 (− 1.91, 1.09) | 0.72 (-0.80, 2.24) | 0.37 (− 1.18, 1.92) |  |