Table 3.
Linear regression coefficients for selenium intakes and BMD.
| Intake of selenium (µg/day) | Range of selenium Intake (µg/day) |
BMD (gm/cm2) | |||||
|---|---|---|---|---|---|---|---|
| Total femur β (p) | Femoral neck β (p) | Total spine β (p) | |||||
| Model 1 a | Model 2 b | Model 1 a | Model 2 b | Model 1 a | Model 2 b | ||
| Dietary selenium (µg/day) | |||||||
| Q1 | ≤73.15 | Reference | Reference | Reference | Reference | Reference | Reference |
| Q2 | 73.16-98.55 | 0.042(0.020) | 0.029(0.101) | 0.043(0.024) | 0.029(0.114) | 0.009(0.640) | 0.001(0.991) |
| Q3 | 98.56-130.05 | 0.073(0.001) | 0.051(0.004) | 0.082(0.001) | 0.059(0.002) | 0.050(0.010) | 0.035(0.072) |
| Q4 | ≥130.06 | 0.106(0.001) | 0.069(0.001) | 0.106(0.001) | 0.064(0.001) | 0.053(0.009) | 0.030(0.136) |
| P for trend | 0.001 | 0.001 | 0.001 | 0.001 | 0.003 | 0.064 | |
| Total selenium (µg/day) | |||||||
| Q1 | ≤79.35 | Reference | Reference | Reference | Reference | Reference | Reference |
| Q2 | 79.36-110.05 | 0.037(0.040) | 0.025(0.157) | 0.042(0.027) | 0.029(0.117) | 0.003(0.876) | -0.006(0.739) |
| Q3 | 110.06-147.75 | 0.060(0.001) | 0.047(0.008) | 0.067(0.001) | 0.054(0.004) | 0.029(0.142) | 0.018(0.353) |
| Q4 | ≥147.76 | 0.087(0.001) | 0.060(0.001) | 0.086(0.001) | 0.058(0.003) | 0.047(0.019) | 0.030(0.140) |
| P for trend | 0.001 | 0.001 | 0.001 | 0.001 | 0.008 | 0.070 | |
a
Linear regression adjusted for sex, body mass index, marital status and race.
b
Linear regression further adjusted for history of hypertension, history of diabetes, history of osteoporosis in parents , history of previous fractures, education ,age and history of smoking.