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Table 3 Estimation of relative risks of type II diabetes using continuous and categorical values of BMIC and BMID

From: Examining validity of body mass index calculated using height and weight data from the US driver license

  Model 1 Model 2 Model 3 Model 4
Parameter Estimate Relative Risk 95% Relative Risk Confidence Interval Parameter Estimate Relative Risk 95% Relative Risk Confidence Interval Parameter Estimate Relative Risk 95% Relative Risk Confidence Interval Parameter Estimate Relative Risk 95% Relative Risk Confidence Interval
BMIC 0.71*** 2.04 1.96 2.12             
BMID      0.74*** 2.09 2.01 2.18         
Categorical BMI C
 Underweight          −0.61* 0.54 0.33 0.89     
 Overweight          0.60*** 1.82 1.62 2.03     
 Type I obesity          1.25*** 3.47 3.09 3.90     
 Type II/III obesity          1.91*** 6.78 6.02 7.63     
Categorical BMI D
 Underweight              −0.55* 0.58 0.36 0.92
 Overweight              0.76*** 2.15 1.94 2.37
 Type I obesity              1.43*** 4.18 3.74 4.67
 Type II/III obesity              2.09*** 8.07 7.13 9.14
  1. Note. Subscript C is used to denote BMI calculated using the clinical height and weight values. Subscript D is used to denote BMI calculated using the height and weight values obtained from the DLD. Continuous BMI C and BMI D included in Models 1 and 2 were scaled. Normal weight (BMI between 18.5 and 24.9 kg/m 2 ) is a reference category in Models 3 and 4. All models include birth year, sex, education, race and ethnicity as additional covariates (estimates not shown). Significant results are indicated as follows: * p ≤ 0.05, ** p ≤ 0.01, ***p ≤ 0.001