Adjusted risk ratio for the risk factors for body mass index
| Underweight | Overweight | Obesity | ||||
| RRR | 95% CI | RRR | 95% CI | RRR | 95% CI | |
| Age | ||||||
| 11 | 1 | (1.00 to 1.00) | 1 | (1.00 to 1.00) | 1.00 | (1.00 to 1.00) |
| 12 | 0.42** | (0.24 to 0.73) | 1.29 | (0.73 to 2.26) | 1.24 | (0.61 to 2.53) |
| 13 | 0.51* | (0.31 to 0.86) | 1.56 | (0.90 to 2.71) | 1.49 | (0.75 to 2.96) |
| 14 | 0.36*** | (0.20 to 0.63) | 1.48 | (0.83 to 2.62) | 0.69 | (0.31 to 1.56) |
| 15 | 0.23*** | (0.11 to 0.47) | 0.97 | (0.50 to 1.88) | 0.47 | (0.18 to 1.27) |
| 16–17 | 0.14*** | (0.05 to 0.37) | 0.38* | (0.16 to 0.90) | 0.24* | (0.08 to 0.73) |
| Sex | ||||||
| Male | 1 | (1.00 to 1.00) | 1 | (1.00 to 1.00) | 1.00 | (1.00 to 1.00) |
| Female | 1.68* | (1.13 to 2.49) | 1.14 | (0.81 to 1.58) | 0.31*** | (0.19 to 0.49) |
| Location of school | ||||||
| Rural | 1 | (1.00 to 1.00) | 1 | (1.00 to 1.00) | 1.00 | (1.00 to 1.00) |
| Urban | 0.52** | (0.32 to 0.84) | 1.67** | (1.15 to 2.42) | 1.72* | (1.01 to 2.93) |
| BP categories | ||||||
| Normotensive | 1 | (1.00 to 1.00) | 1 | (1.00 to 1.00) | 1.00 | (1.00 to 1.00) |
| Prehypertensive | 0.7 | (0.30 to 1.68) | 1.94* | (1.15 to 3.24) | 1.43 | (0.66 to 3.09) |
| Hypertension | 2.55*** | (1.48 to 4.41) | 7.44*** | (4.21 to 13.16) | ||
| SES | ||||||
| Low | 1 | (1.00 to 1.00) | 1 | (1.00 to 1.00) | 1.00 | (1.00 to 1.00) |
| Middle | 1.1 | (0.73 to 1.64) | 1.73** | (1.15 to 2.60) | 3.78*** | (1.87 to 7.66) |
| High | 1.29 | (0.41 to 4.04) | 5.85*** | (3.10 to 11.04) | 38.6*** | (16.54 to 90.22) |
| Junk food | ||||||
| No | 1 | (1.00 to 1.00) | 1 | (1.00 to 1.00) | 1.00 | (1.00 to 1.00) |
| Yes | 1.16 | (0.68 to 1.98) | 0.94 | (0.57 to 1.53) | 0.80 | (0.38 to 1.66) |
| Added salt intake | ||||||
| No | 1 | (1.00 to 1.00) | 1 | (1.00 to 1.00) | 1.00 | (1.00 to 1.00) |
| Yes | 3.01*** | (2.13 to 4.24) | 0.92 | (0.65 to 1.29) | 0.72 | (0.44 to 1.17) |
| Dietary pattern | ||||||
| Vegetarian | 1.14 | (0.74 to 1.76) | 1.05 | (0.74 to 1.48) | 1.24 | (0.78 to 1.95) |
| Eggetarian | 1.3 | (0.69 to 2.45) | 0.62 | (0.32 to 1.19) | 0.60 | (0.24 to 1.51) |
| Exercise | ||||||
| No | 1 | (1.00 to 1.00) | 1 | (1.00 to 1.00) | 1.00 | (1.00 to 1.00) |
| Yes | 1.54 | (0.94 to 2.54) | 1.06 | (0.73 to 1.55) | 0.39*** | (0.25 to 0.62) |
Adjusted risk ratios for BMI categories were estimated using ordinal logistic regression model and included age, sex, BP and all other variables shown in the table. The goodness-of-fit test of the model was not significant (p=0.524) and the AIC value was 2693.8.
*P<0.01, **p<0.001, ***p<0.0001.
AIC, akaike information criterion; BMI, body mass index; BP, blood pressure; RRR, relative risk ratio; SES, socioeconomic status.