Table 2.
Percentage Depressed, by Body Mass Index, Waist Circumference, and Sex, National Health and Nutrition Examination Survey, 2005-2006
| Characteristic | Number Depressed/Total | Weighted % | P Valuea |
|---|---|---|---|
| Men (n = 1,871) | |||
| Body mass index, kg/m2 | |||
| <18.5 (underweight) | 1/25 | 1.0 | .24 |
| 18.5-24.9 (normal weight)b | 23/478 | 4.2 | |
| 25.0-29.9 (overweight) | 26/773 | 2.8 | |
| 30.0-34.9 (class I obesity) | 28/387 | 6.1 | |
| 35.0-39.9 (class II obesity) | 8/132 | 6.4 | |
| ≥40.0 (class III obesity) | 4/76 | 5.5 | |
| Total | 90/1,817 | 4.2 | |
| Waist circumference | |||
| Smallc (<102 cm) | 43/1,062 | 3.5 | .29 |
| Large (≥102 cm) | 47/809 | 5.2 | |
| Women (n = 1,728) | |||
| Body mass index, kg/m2 | |||
| <18.5 (underweight) | 1/39 | 1.3 | <.001 |
| 18.5-24.9 (normal weight)b | 33/545 | 4.9 | |
| 25.0-29.9 (overweight) | 29/473 | 5.2 | |
| 30.0-34.9 (class I obesity) | 22/338 | 4.8 | |
| 35.0-39.9 (class II obesity) | 11/197 | 6.4 | |
| ≥40.0 (class III obesity) | 26/136 | 18.2 | |
| Total | 122/1,728 | 6.0 | |
| Waist circumference | |||
| Smallc (<88 cm) | 30/630 | 4.0 | .01 |
| Large (≥88 cm) | 92/1,098 | 7.4 | |
a
P values calculated by using Pearson χ 2 test.
b
Referent group for comparison of prevalence of depression by body mass index category.
c
Referent group for comparison of prevalence of depression by waist circumference category.