Sagittal Abdominal Diameter, Waist Circumference, and BMI as Predictors of Multiple Measures of Glucose Metabolism: An NHANES Investigation of US Adults

Table 3

Shared variance between the anthropometric variables and the glucose metabolism variables by gender.

Metabolic measure	SAD			Waist circumference			BMI
	R^2	F	P	R^2	F	P	R^2	F	P
Men only ()
OGTT
Model 1	0.125^a	183.7	0.0001	0.102^b	117.8	0.0001	0.076^c	95.0	0.0001
Model 2	0.094^a	149.6	0.0001	0.077^b	125.0	0.0001	0.077^b	136.4	0.0001
Model 3	0.018^a	20.3	0.0001	0.003^b	4.3	0.0500	0.001^c	2.7	0.1115
Fasting glucose
Model 1	0.141^a	69.2	0.0001	0.127^b	54.9	0.0001	0.098^c	35.0	0.0001
Model 2	0.111^a	67.6	0.0001	0.095^b	51.5	0.0001	0.093^b	42.8	0.0001
Model 3	0.014^a	24.6	0.0001	0.001^b	2.4	0.1297	0.001^b	1.1	0.3119
HbA1c
Model 1	0.088^a	55.6	0.0001	0.068^b	36.9	0.0001	0.048^c	21.8	0.0001
Model 2	0.059^a	44.1	0.0001	0.046^b	30.2	0.0001	0.047^b	25.8	0.0001
Model 3	0.014^a	22.0	0.0001	0.003^b	7.1	0.0121	0.001^c	0.8	0.3690
HOMA-IR
Model 1	0.454^a	879.9	0.0001	0.421^b	549.5	0.0001	0.398^c	357.4	0.0001
Model 2	0.459^a	765.6	0.0001	0.428^b	489.3	0.0001	0.393^c	363.4	0.0001
Model 3	0.031^a	62.9	0.0001	0.001^b	1.6	0.2191	0.000^c	0.3	0.6114
Women only ()
OGTT
Model 1	0.079^a	64.9	0.0001	0.061^b	59.0	0.0001	0.046^c	44.4	0.0001
Model 2	0.060^a	54.8	0.0001	0.050^b	57.9	0.0001	0.050^b	57.7	0.0001
Model 3	0.009^a	8.7	0.0058	0.000^b	0.6	0.4623	0.000^b	0.0	0.9936
Fasting glucose
Model 1	0.132^a	168.9	0.0001	0.115^b	143.8	0.0001	0.089^c	140.1	0.0001
Model 2	0.105^a	136.6	0.0001	0.096^a,b	132.1	0.0001	0.088^a,b	142.8	0.0001
Model 3	0.009^a	10.3	0.0031	0.001^b	1.1	0.3106	0.001^b	0.9	0.3534
HbA1c
Model 1	0.095^a	163.8	0.0001	0.072^b	148.0	0.0001	0.050^c	112.3	0.0001
Model 2	0.054^a	93.2	0.0001	0.048^a,b	110.2	0.0001	0.043^a,b	99.3	0.0001
Model 3	0.007^a	7.2	0.0114	0.000^b	0.1	0.7223	0.001^c	2.0	0.1676
HOMA-IR
Model 1	0.402^a	489.2	0.0001	0.376^b	342.4	0.0001	0.372^b	399.0	0.0001
Model 2	0.389^a	450.3	0.0001	0.359^b	317.3	0.0001	0.350^b	363.0	0.0001
Model 3	0.024^a	53.0	0.0001	0.001^b	1.3	0.2676	0.000^c	0.7	0.3981

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 and race. Model 3: adjusted for age, race, and the remaining two anthropometric variables. For example, Model 3 for OGTT and SAD adjusts for age, race, waist circumference, and BMI. ^a,b,cR² values on the same row with the same superscript letter do not differ significantly ().