Skip to main content

Table 5 Threshold effect analysis of 25(OH)D and total BMD using piece-wise linear regression

From: Does higher serum 25-hydroxyvitamin D levels will harm bone mineral density?: a cross-sectional study

Crude model

Adjusted model

25(OH)D, (nmol/L)

β(95% CI)

P value

25(OH)D, (nmol/L)

β(95% CI)

P value

< 81

0.0002 (0.0001, 0.0003)

0.0027

< 81.1

0.0007 (0.0005, 0.0008)

< 0.0001

≥ 81

-0.0005 (-0.0006, -0.0003)

< 0.0001

≥ 81.1

-0.0001 (-0.0003, 0.0000)

0.1498

Likelihood Ratio test

 

< 0.001

  

< 0.001

  1. Data were presented as β(95%CI) P value
  2. Abbreviations: 25(OH)D = 25-hydroxyvitamin D. BMD = bone mineral density
  3. The adjusted model is adjusted for gender, age, race, education level, family income to poverty ratio, body mass index, alcohol consumption frequency, serum cotinine, physical activity, sedentary activity, sun exposure, and HbA1C
Back to article page

BMC Endocrine Disorders

ISSN: 1472-6823

Contact us