Table 5.
Two-piecewise linear regression models of dietary fiber intake on BMD in males.
| Index | Total femur BMD | Femoral neck BMD | Trochanter BMD | Intertrochanter BMD |
|---|---|---|---|---|
| Fitting by the standard linear model | −0.0001 (−0.0010, 0.0008) | −0.0002 (−0.0011, 0.0008) | −0.0000 (−0.0008, 0.0008) | −0.0002 (−0.0013, 0.0009) |
| Fitting by the two-piecewise linear model | ||||
| Inflection point (gm/day) | 25 | 25 | 25 | 25 |
| Dietary fiber intake < Infection point | 0.0011 (−0.0005, 0.0027) | 0.0015 (−0.0001, 0.0031) | 0.0012 (−0.0002, 0.0025) | 0.0007 (−0.0012, 0.0026) |
| Dietary fiber intake > Infection point | −0.0011 (−0.0026, 0.0004) | −0.0017 (−0.0032, −0.0002) | −0.0012 (−0.0025, 0.0002) | −0.0010 (−0.0028, 0.0008) |
Age, race, education level, income level, BMI, smoking status, alcohol consumption, hypertension, diabetes, blood calcium level, serum 25-hydroxyvitamin D, RA, cancer, use of glucocorticoid, family history of osteoporosis, previous fractures, physical activity level, calcium intake level, and vitamin D intake level were adjusted. BMD, bone mineral density; BMI, body mass index; RA, rheumatoid arthritis.