TABLE 3

Standardized Percentages of Children With Diagnosis of Prehypertension

Demographic Factor, n = 38 874Standardized Percentage (95% CI)Overall Within-Factor Difference, P
Age category, y<.001
 3–99.3 (8.8–9.7)
 10–1411.0 (10.6– 11.5)
 15–1811.7 (10.6–12.9)
Weight, %<.001
 Normal7.7 (7.4–8.1)
 Overweight9.5 (8.9–10.2)
 Obese14.7 (14.1–15.3)
Height, %.011
 Not tall10.2 (9.9–10.5)
 Tall11.7 (10.6–12.8)
Sex, %<.001
 Female8.2 (7.7–8.6)
 Male11.7 (11.3–12.1)
Stage 2 range BP readings, %<0.001
 No9.4 (9.1–9.7)
 Yes19.4 (18.1–20.6)
No. of abnormal BP readings >3, %<.001
 No extra readings8.3 (7.9–8.7)
 1 extra reading11.4 (10.8–12.0)
 2 extra readings13.7 (12.7–14.8)
 ≥3 extra readings18.0 (16.6–19.4)
  • All estimates are standardized (adjusted). Models using logistic regression and predictive margins for standardization included age, weight, height, sex presence of BP readings in stage 2 range, and number of abnormal BP readings >3. All models also include clinical practice site as a covariate because variation across sites in the rate of diagnosis and the characteristics of patients induces confounding by practice. Estimates therefore can be interpreted as the adjusted percentage of children who received a diagnosis of prehypertension within practice sites (and averaged across practice sites), controlling for their individual differences.