Table 3.
BMI and nutritional categories according to sex, residence, and income
| Factor | Mean (BMI±SD) | Proportions of subjects |
|||
|---|---|---|---|---|---|
| Underweight | Normal | Overweight | Obese | ||
| Sex | |||||
| Male | 21.65±4.09 | 26.0 | 53.3 | 16.9 | 3.8 |
| Female∗ | 22.46±4.89 | 24.0 | 47.4 | 21.0† | 7.7† |
| Residence | |||||
| Rural | 20.16±3.70 | 38.5† | 51.1 | 8.5 | 1.9 |
| Urban∗ | 22.75±4.69 | 20.5 | 49.3 | 22.7† | 7.5† |
| Income | |||||
| Low | 20.16±3.70 | 39.9† | 50.2 | 8.4 | 1.5 |
| Middle∗ | 21.8± 4.50 | 26.6 | 51.2 | 16.8 | 5.3 |
| High∗ | 24.15±4.50 | 10.0 | 47.2 | 31.8† | 11.0† |
∗ p<0.001 (Student's t-test/ANOVA) for comparisons of BMI within categories of sex, residence, and income (compared to low income);
† p<0.001 (chi-square test) for significance of differences in proportions of the four categories of nutritional status according to sex, residence, and income;
ANOVA=Analysis of variance; BMI=Body mass index; SD=Standard deviation