Table 1.
Descriptive statistics of children and visits that are included in the analysis, information from electronic health record, all children ages 3-18, 2001 - 2012
| Variable | N | Mean/Perc | (SD) | Range |
|---|---|---|---|---|
| BMI(a) percentile (Visits) | 65.86 | (28.99) | 1 - 100 | |
| BMI z-score (Visits) | 0.59 | (1.12) | −6.3-3.9 | |
| Age (years) (Visits) | 10.68 | (4.75) | 3-18 | |
| Age at first BMI, years | 8.86 | (5.05) | 3-18 | |
| Age at last BMI, years | 11.83 | (5.09) | 3-18 | |
| Sex (Children) | ||||
| Male | 81,266 | 50.32% | ||
| Female | 81,207 | 49.68% | ||
| Duration between 1st and last BMI, years |
297(b) | (0.01) | 0-11.1 | |
| Number of annual BMI measures for analysis |
3.2 | (2.41) | 1 - 13 | |
| Race/ethnicity (Children) | ||||
| Non-Hispanic White | 149,191 | 91.26% | ||
| Black | 7,700 | 4.71% | ||
| Hispanic | 1,864 | 1.14% | ||
| Other or missing | 4,718 | 2.89% | ||
| On Medical Assistance | 55,171 | 33.75% |
a
BMI: body mass index (kg/m2) percentile, according to CDC growth curves, children > 85th percentile are considered overweight, children > 95th percentile are considered obese
b
32.2% of children only had one observation