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Table 3 Stratified analysis of the correlation between serum total ALP and lumbar BMD

From: The correlation between serum total alkaline phosphatase and bone mineral density in young adults

  Model 1
β (95% CI) P value
Model 2
β (95% CI) P value
Model 3
β (95% CI) P value
Subgroup analysis stratified by age
 20 to 29 years -0.0013(-0.0016, -0.0010) < 0.000001 -0.0012(-0.0015, -0.0009) < 0.000001 -0.0010(-0.0013, -0.0007) < 0.000001
 30 to 40 years -0.0008(-0.0011, -0.0006) < 0.000001 -0.0006(-0.0008, -0.0004) < 0.000001 -0.0005(-0.0008, -0.0003) 0.000006
Subgroup analysis stratified by sex
 Male -0.0008(-0.0011, -0.0005) < 0.000001 -0.0007(-0.0009, -0.0004) < 0.000001 -0.0006(-0.0008, -0.0003) 0.000015
 Female -0.0012(-0.0014, -0.0009) < 0.000001 -0.0011(-0.0013, -0.0008) < 0.000001 -0.0010(-0.0012, -0.0007) < 0.000001
Subgroup analysis stratified by race/ethnicity
 Non-Hispanic white -0.0006(-0.0009, -0.0003) 0.000031 -0.0005(-0.0008, -0.0003) 0.000140 -0.0004(-0.0007, -0.0002) 0.002834
 Non-Hispanic black -0.0009(-0.0013, -0.0004) 0.000187 -0.0010(-0.0014, -0.0005) 0.000059 -0.0007(-0.0012, -0.0003) 0.002721
 Mexican American -0.0012(-0.0015, -0.0008) < 0.000001 -0.0011(-0.0015, -0.0007) < 0.000001 -0.0010(-0.0014, -0.0006) < 0.000001
 Other race/ethnicity -0.0013(-0.0017, -0.0010) < 0.000001 -0.0013(-0.0016, -0.0009) < 0.000001 -0.0013(-0.0017, -0.0010) < 0.000001
  1. Model 1, no covariates were adjusted
  2. Model 2, age, sex, race/ethnicity were adjusted
  3. Model 3, age, sex, race/ethnicity, education, income to poverty ratio, waist circumference, smoking behavior, alcohol consumption, blood urea nitrogen, serum uric acid, total protein, total cholesterol, serum phosphorus, serum calcium and calcium supplementation were adjusted. In the subgroup analysis stratified by age, sex and race/ethnicity, the model was not adjusted for age, sex or race/ethnicity