Table 3.

Threshold effect analysis of ln-LAP and lumbar BMD.

Total spine BMD	β (95% CI)	P value
ln-LAP
Inflection point	2.846
ln-LAP < Inflection point	0.011 (−0.007, 0.029)	0.351
ln-LAP < Inflection point	−0.029 (−0.050, −0.006)	< 0.001
Log-likelihood ratio		0.007

Age, gender, race, PIR, education level, BMI, total protein, blood urea nitrogen, serum total calcium, serum phosphorus, serum uric acid, cholesterol, serum vitamin D, smoking and drinking behaviors, high blood pressure, diabetes, physical activity, and HEI-2015 were adjusted. Abbreviation: BMI: body mass index. PIR: poverty income ratio. BMD: bone mineral density. LAP: lipid accumulation products. HEI-2015: Healthy Eating Index-2015.