Table 3.
Saturation effect analysis of BMI (kg/m2) on BMD (g/cm2) in whole participants.
| Outcome | Model: Saturation effect analysis | LRT-test | |||
|---|---|---|---|---|---|
| BMI turning point (K), kg/m2 | <K, effect 1 | >K, effect 2 | Effect 2 – 1 | ||
| Total femur BMD | 26.13 | 0.023 (0.022, 0.025) | 0.007 (0.007, 0.008) | −0.016 (−0.018, −0.014) | <0.001 |
| Femoral neck BMD | 26.59 | 0.016 (0.015, 0.017) | 0.007 (0.006, 0.007) | −0.009 (−0.011, −0.008) | <0.001 |
| Trochanter BMD | 26.44 | 0.018 (0.017, 0.020) | 0.005 (0.004, 0.006) | −0.013 (−0.015, −0.012) | <0.001 |
| Intertrochanter BMD | 26.06 | 0.028 (0.026, 0.030) | 0.008 (0.007, 0.009) | −0.020 (−0.022, −0.017) | <0.001 |
| Wards triangle BMD | 29.60 | 0.013 (0.011, 0.014) | 0.006 (0.005, 0.007) | −0.006 (−0.008, −0.005) | <0.001 |
| Total spine BMD | 26.82 | 0.018 (0.016, 0.020) | 0.006 (0.005, 0.007) | −0.012 (−0.015, −0.010) | <0.001 |
| L1 BMD | 31.90 | 0.015 (0.014, 0.016) | 0.004 (0.003, 0.005) | −0.012 (−0.014, −0.010) | <0.001 |
| L2 BMD | 30.89 | 0.015 (0.014, 0.016) | 0.002 (0.001, 0.003) | −0.013 (−0.015, −0.011) | <0.001 |
| L3 BMD | 25.60 | 0.018 (0.016, 0.020) | 0.006 (0.005, 0.007) | −0.012 (−0.014, −0.009) | <0.001 |
| L4 BMD | 25.60 | 0.018 (0.016, 0.020) | 0.006 (0.005, 0.006) | −0.012 (−0.015, −0.010) | <0.001 |
Results in the table: β (95% CI).
Outcome: Total femur BMD, Femoral neck BMD, Femoral neck BMD, Trochanter BMD, Intertrochanter BMD, Wards triangle BMD, Total spine BMD, L1 BMD, L2 BMD, L3 BMD, L4 BMD.
Exposure: BMI (kg/m2).
Adjust for: Gender, Race, Age, Education level, Ratio of family income to poverty, Smoked at least 100 cigarettes in life, Moderate work activity, Albumin refrigerated serum, Globulin, Glucose refrigerated serum, Cholesterol refrigerated serum, Cholesterol Triglycerides, Standing Height, Arm Circumference, Waist Circumference.
LRT-test: Log-likelihood ratio test.