Fig. 4.

The association between AIP and LS BMD ^a. Abbreviations: AIP, Atherogenic index of plasma; BMD, bone mineral density; ALT, alanine transaminase; AST, aspartate transaminase; PIR, family income-to-poverty ratio; LS BMD, Lumbar spine bone mineral density. ^a A solid red line represents the smooth curve fit between variables. Blue bands represent the 95% confidence interval from the fit. Age, Sex, race, degree of education, income(PIR), Average alcoholic drinks per day last 12 Mth, ALT, AST, Total calcium, Serum creatinine, Ever been told you have osteoporosis brittle bones were adjusted. Smooth curve fitting using GAM to evaluate the nonlinear relationship between AIP and LS BMD