Table 4. Odds ratios and 95% confidence intervals of high blood pressure by BMI and sex.
| Boys | Girls | |||||||||
| n | Crude | Adjusteda | n | Crude | Adjusteda | |||||
| OR | 95% CI | OR | 95% CI | OR | 95% CI | OR | 95% CI | |||
| Fourth graders (age 9–10 years) | ||||||||||
| BMI percentile | ||||||||||
| <50th | 279 | 1 | 1 | 318 | 1 | 1 | ||||
| 50–74th | 217 | 1.44 | (0.82–2.54) | 1.45 | (0.82–2.56) | 159 | 2.33 | (1.35–4.00) | 2.32 | (1.34–3.99) |
| 75–84th | 66 | 4.54 | (2.36–8.76) | 4.52 | (2.34–8.72) | 63 | 1.81 | (0.84–3.93) | 1.81 | (0.84–3.93) |
| 85–94th | 66 | 3.38 | (1.70–6.69) | 3.43 | (1.73–6.82) | 65 | 1.96 | (0.92–4.14) | 1.95 | (0.92–4.13) |
| ≥95th | 33 | 6.33 | (2.82–14.17) | 6.30 | (2.81–14.12) | 31 | 13.29 | (5.93–29.77) | 13.32 | (5.95–29.84) |
| (P for trend <0.001) | (P for trend <0.001) | (P for trend <0.001) | (P for trend <0.001) | |||||||
| Seventh graders (age 12–13 years) | ||||||||||
| BMI percentile | ||||||||||
| <50th | 283 | 1 | 1 | 261 | 1 | 1 | ||||
| 50–74th | 141 | 1.00 | (0.47–2.13) | 1.02 | (0.48–2.16) | 131 | 1.52 | (0.74–3.15) | 1.50 | (0.72–3.09) |
| 75–84th | 57 | 1.94 | (0.82–4.60) | 1.83 | (0.76–4.37) | 52 | 1.36 | (0.48–3.81) | 1.33 | (0.47–3.74) |
| 85–94th | 57 | 3.16 | (1.46–6.84) | 3.00 | (1.38–6.54) | 52 | 2.32 | (0.96–5.62) | 2.27 | (0.94–5.53) |
| ≥95th | 28 | 6.59 | (2.72–16.00) | 6.32 | (2.59–15.45) | 26 | 7.96 | (3.18–19.93) | 7.83 | (3.12–19.63) |
| (P for trend <0.001) | (P for trend <0.001) | (P for trend <0.001) | (P for trend <0.001) | |||||||
aAdjusted for family history of hypertension.
BMI, body mass index; OR, odds ratio; 95% CI, 95% confidence interval.