The standardized regression coefficients of serum C-peptide level for total body and regional bone mineral density from multiple regression analysis stratified by age group.

β coefficients are adjusted for gender, ethnicity, height, weight, education level, physical activity, smoking status, alcohol use, triglycerides and creatinine level. Model 1, the
Model 2, additionally adjusted for the fasting plasma glucose.
Model 3, additionally adjusted for the serum alkaline phosphatase.
Slopes of regression significant at the <0.001 level
Slopes of regression significant at the <0.01 level
Slopes of regression significant at the <0.05 level