Sagittal Abdominal Diameter, Waist Circumference, and BMI as Predictors of Multiple Measures of Glucose Metabolism: An NHANES Investigation of US Adults
Table 2
Shared variance between the anthropometric variables and the glucose metabolism variables.
Metabolic measure
SAD
Waist circumference
BMI
All subjects ()
R2
F
P
R2
F
P
R2
F
P
OGTT
Model 1
0.092a
162.8
0.0001
0.073b
128.7
0.0001
0.057c
119.4
0.0001
Model 2
0.073a
163.5
0.0001
0.059b
164.0
0.0001
0.058b
162.5
0.0001
Model 3
0.014a
32.1
0.0001
0.001b
4.2
0.0483
0.000c
0.0
0.8989
Fasting glucose
Model 1
0.146a
184.2
0.0001
0.130b
146.0
0.0001
0.085c
118.3
0.0001
Model 2
0.106a
192.2
0.0001
0.094b
158.1
0.0001
0.088b
157.7
0.0001
Model 3
0.011a
31.2
0.0001
0.000b
0.0
0.9376
0.000b
0.3
0.5996
HbA1c
Model 1
0.090a
166.7
0.0001
0.068b
114.9
0.0001
0.048c
100.7
0.0001
Model 2
0.056a
129.1
0.0001
0.046b
110.1
0.0001
0.044b
97.7
0.0001
Model 3
0.010a
25.0
0.0001
0.001b
1.1
0.2958
0.000c
0.3
0.6094
HOMA-IR
Model 1
0.423a
1051.6
0.0001
0.394b
683.6
0.0001
0.371c
837.3
0.0001
Model 2
0.426a
1198.1
0.0001
0.393b
761.9
0.0001
0.366c
871.5
0.0001
Model 3
0.031a
85.4
0.0001
0.001b
3.9
0.0583
0.000c
0.0
0.9733
R2 includes only the shared variance between the metabolic measure and the anthropometric variable. Variance from the covariates is not included. Model 1: includes no covariates. Model 2: adjusted for age, gender, and race. Model 3: adjusted for age, gender, race, and the remaining two anthropometric variables. For example, Model 3 for OGTT and SAD adjusts for age, gender, race, waist circumference, and BMI. a,b,cR2 values on the same row with the same superscript letter do not differ significantly ().