|
NIH BMI category
|
Actual BMI, kg/m2a
|
Self-reported BMI, kg/m2a
|
Difference, kg/m2b
|
P valuec
|
|---|
|
All patients (N = 508)
| | | | |
|
Underweight
|
17.3 ± 0.7
|
17.4 ± 0.8
|
−0.1
|
.70
|
|
Normal
|
22.5 ± 1.6
|
22.2 ± 1.6
|
0.3
|
<.001
|
|
Overweight
|
27.4 ± 1.4
|
26.7 ± 1.6
|
0.7
|
<.001
|
|
Obese
|
35.1 ± 5.1
|
33.8 ± 4.9
|
1.3d
|
<.001
|
|
Women (n = 257)
| | | | |
|
Underweight
|
17.3 ± 0.7
|
17.4 ± 0.8
|
−0.1
|
.70
|
|
Normal
|
22.3 ± 1.6
|
22.0 ± 1.8
|
0.3
|
.001
|
|
Overweight
|
27.2 ± 1.4
|
26.5 ± 1.6
|
0.7
|
<.001
|
|
Obese
|
35.2 ± 4.4
|
34.1 ± 4.1
|
1.1d
|
<.001
|
|
Men (n = 251)
| | | | |
|
Underweight
|
NA
|
NA
|
NA
|
NA
|
|
Normal
|
23.0 ± 1.5
|
22.7 ± 1.3
|
0.3
|
.002
|
|
Overweight
|
27.6 ± 1.4
|
26.8 ± 1.5
|
0.7
|
<.001
|
|
Obese
|
35.0 ± 5.6
|
33.5 ± 5.4
|
1.5d
|
<.001
|
-
Abbreviations: BMI body mass index, NA not applicable, NIH National Institutes of Health.
-
aValues shown are mean ± SD.
-
bAnalysis of variance for trend of differences.
-
cMatched pairs t test comparing actual BMI vs self-reported BMI by actual body type.
-
d
P < .001 using analysis of variance for trend of differences.
