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Table 5 Contributions of gender and ethnicity to R 2 for serum 25(OH)D level

From: Vitamin D level and its association with adiposity among multi-ethnic adults in Kuala Lumpur, Malaysia: a cross sectional study

  Unstandardized B
Model 1 (Reference Model) Model 2 Model 3
Age 0.033 0.022 0.138**
Sun avoidance score −0.081 −0.638* −0.377
Systolic blood pressure 0.013 0.025 0.021
BMI −0.140* −0.145* −0.327**
Ethnicity    
 Chinese Reference Reference
 Malays −8.512** −8.317**
 Indians −9.070** −9.558**
 Others −4.965 −5.913*
Gender −7.461**   −7.269**
R 2 32.8 % 25.7 % 15.9 %
Difference in R 2   7.1 % 16.9 %
  1. ** p < 0.001, *p < 0.05
  2. Gender: Males = 1, Females = 2
  3. Model 1 = Predictors: age, sun avoidance score, systolic blood pressure, BMI, ethnicity, gender
  4. Model 2 = Model 1 - Gender
  5. Model 3 = Model 1 - Ethnicity
  6. Difference in R 2 = R 2 in Model 1 (Reference Model) - R 2 in Model 2/Model 3