Sagittal Abdominal Diameter, Waist Circumference, and BMI as Predictors of Multiple Measures of Glucose Metabolism: An NHANES Investigation of US Adults
Table 4
Shared variance between the anthropometric variables and the glucose metabolism variables by BMI category.
Metabolic measure
SAD
Waist circumference
BMI
R2
F
P
R2
F
P
R2
F
P
Normal weight ()
OGTT
Model 1
0.026a
19.0
0.0001
0.034a
25.7
0.0001
0.021a
11.5
0.0018
Model 2
0.005a
4.2
0.0494
0.008a
8.2
0.0074
0.011a
8.3
0.0070
Model 3
0.000a
0.0
0.8902
0.000a
0.3
0.5726
0.004b
3.21
0.0825
Fasting glucose
Model 1
0.097a
180.1
0.0001
0.111a
113.5
0.0001
0.043b
33.5
0.0001
Model 2
0.025a
40.5
0.0001
0.030a
25.1
0.0001
0.018a
11.9
0.0016
Model 3
0.002a,b
1.0
0.3156
0.004a
2.22
0.1462
0.000b
0.2
0.6405
HbA1c
Model 1
0.057a
47.4
0.0001
0.060a
50.6
0.0001
0.010b
6.7
0.0146
Model 2
0.002a
2.3
0.1413
0.002a
1.3
0.2724
0.000a
0.0
0.8754
Model 3
0.001a
1.2
0.2880
0.001a
0.6
0.4605
0.001a
1.0
0.3280
HOMA-IR
Model 1
0.088a
70.6
0.0001
0.075a
51.8
0.0001
0.069a
104.6
0.0001
Model 2
0.122a
110.0
0.0001
0.109a
93.6
0.0001
0.073b
111.0
0.0001
Model 3
0.023a
10.4
0.0029
0.005b
2.9
0.0991
0.003b
3.2
0.0854
Overweight ()
OGTT
Model 1
0.065a
62.2
0.0001
0.026b
16.2
0.0003
0.011b
6.4
0.0163
Model 2
0.033a
24.3
0.0001
0.011b
10.4
0.0029
0.014b
9.2
0.0048
Model 3
0.021a
11.9
0.0016
0.003b
2.5
0.1273
0.002b
1.5
0.2231
Fasting glucose
Model 1
0.087a
97.1
0.0001
0.058b
53.3
0.0001
0.012c
9.5
0.0042
Model 2
0.032a
36.0
0.0001
0.014b
16.1
0.0003
0.013b
12.9
0.0011
Model 3
0.017a
16.8
0.0003
0.001b
1.1
0.3124
0.001b
1.1
0.3002
HbA1c
Model 1
0.043a
42.8
0.0001
0.013b
16.5
0.0003
0.000c
0.5
0.4760
Model 2
0.011a
9.9
0.0036
0.002b
2.2
0.1456
0.001b
2.0
0.1656
Model 3
0.013a
13.1
0.0010
0.003b
4.3
0.0457
0.000b
0.1
0.7192
HOMA-IR
Model 1
0.113a
82.4
0.0001
0.063b
63.7
0.0001
0.039b
32.1
0.0001
Model 2
0.123a
98.4
0.0001
0.070b
92.9
0.0001
0.041c
35.8
0.0001
Model 3
0.051a
22.8
0.0001
0.000b
0.0
0.9120
0.000b
0.2
0.6276
Obese ()
OGTT
Model 1
0.040a
19.8
0.0001
0.016b
8.3
0.0070
0.007b
3.9
0.0574
Model 2
0.036a
20.3
0.0001
0.019b
13.0
0.0010
0.016b
9.9
0.0035
Model 3
0.023a
26.0
0.0001
0.002b
2.8
0.1024
0.001b
1.8
0.1906
Fasting glucose
Model 1
0.088a
38.3
0.0001
0.061b
21.2
0.0001
0.023c
11.4
0.0019
Model 2
0.069a
35.6
0.0001
0.053a
24.1
0.0001
0.047b
23.3
0.0001
Model 3
0.015a
12.6
0.0012
0.000b
0.0
0.9791
0.000b
0.1
0.7686
HbA1c
Model 1
0.072a
41.6
0.0001
0.037b
14.8
0.0005
0.021b
14.5
0.0006
Model 2
0.061a
42.9
0.0001
0.042b
24.4
0.0001
0.036b
23.3
0.0001
Model 3
0.020a
13.8
0.0008
0.000b
0.3
0.6214
0.001b
1.4
0.2494
HOMA-IR
Model 1
0.241a
163.9
0.0001
0.199b
134.0
0.0001
0.145c
110.2
0.0001
Model 2
0.252a
218.2
0.0001
0.204b
146.6
0.0001
0.174b
153.5
0.0001
Model 3
0.045a
33.8
0.0001
0.001b
0.4
0.5182
0.000b
0.4
0.5290
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 ().