Table 3 Subgroup analysis of serum ferritin with lumbar spine bone mineral density, stratified by age and gender
From: Association between serum ferritin and bone mineral density in US adults
Subgroup analysis | β (95% CI) P value | P for interaction |
|---|---|---|
Age, years | 0.0249 | |
Age < 45 | − 0.062 (− 0.128, 0.004) | |
Age ≧ 45 | − 0.097 (− 0.159, − 0.036)** | |
Gender | 0.0007 | |
Male | − 0.057 (− 0.120, − 0.006) | |
Female | − 0.089 (− 0.155, − 0.024)** | |
Age * gender | 0.0461 | |
Female ≧ 45 | − 0.169 (− 0.259, − 0.079)** | |
Female < 45 | − 0.080 (− 0.177, 0.016) | |
Male ≧ 45 | − 0.021 (− 0.105, 0.064) | |
Male < 45 | − 0.062 (− 0.154, 0.031) | |