Table 1.
Descriptive Statistics for Variables
| Category | Variable | Proportion | Mean | SD | Range [Min, Max] | Percentage Missing |
|---|---|---|---|---|---|---|
| Independent variable | ||||||
| Female | 27 % | - | - | - | 0% | |
| Age in years at start of medication | 8.3 | 1.9 | [5.1, 15] | 1% | ||
| Started medication after AUXAL-projected age of slowest growth | 19 % | - | - | - | 1% | |
| Height (z) at start of medication | 0.04 | 0.96 | [−2.43, 3.04] | 2% | ||
| Weight (z) at start of medication | 0.34 | 0.89 | [−2.42, 2.60] | 1% | ||
| BMI (z) at start of medication | 0.46 | 0.85 | [−1.63, 2.24] | 2% | ||
| Midparental height in centimeters (measured or reported) | 172.9 | 7.6 | [153.1, 190.0] | 16% | ||
| Parent rating of hyperactivity/impulsivity symptoms of ADHD at study entry | 1.79 | 0.74 | [0, 3] | 6% | ||
| Parent rating of inattention symptoms of ADHD at study entry | 2.13 | 0.65 | [0.33, 3] | 6% | ||
| Parent rating of ODD symptoms at study entry | 0.98 | 0.69 | [0, 2.88] | 6% | ||
| Parent rating of loss of appetite at optimization was moderate/severe | 26 % | - | - | - | 6% | |
| Percent of days medicated in first 6 months after starting medication | 0.72 | 0.17 | [0.37, 1] | 0% | ||
| Percent of days medicated in first 12 months after starting medication | 0.68 | 0.17 | [0.28, 1] | 0% | ||
| Percent of days medicated from start of medication to last available visit | 0.63 | 0.19 | [0.14, 1] | 7% | ||
| Total MPH intake (kg) in first 6 months after starting medication | 2.82 | 1.08 | [0.18, 6.01] | 0% | ||
| Total MPH intake (kg) in first 12 months after starting medication | 5.54 | 2.41 | [0.48, 15.52] | 0% | ||
| Total MPH intake (kg) from start of medication to last available visit | 12.1 | 7.53 | [0, 44.68] | 0% | ||
| Dependent variable | ||||||
| Met criteria for Weight Recovery Treatment (WRT) | 49 % | - | - | - | 0 % | |
| Change in BMI (z) from start of medication to +6 months | −0.42 | 0.35 | [−1.70, 0.17] | 9 % | ||
| Change in BMI (z) from start of medication to +12 months | −0.36 | 0.31 | [−1.32, 0.28] | 13 % | ||
| Change in BMI (z) from start of medication to last available visit | −0.31 | 0.49 | [−1.78, 1.05] | 10 % | ||
| Change in weight (z) from start of medication to +6 months | −0.30 | 0.23 | [−0.96, 0.19] | 7 % | ||
| Change in weight (z) from start of medication to +12 months | −0.31 | 0.24 | [−0.92, 0.27] | 13 % | ||
| Change in weight (z) from start of medication to last available visit | −0.30 | 0.44 | [−1.58, 0.86] | 9 % | ||
| Change in height (z) from start of medication to +6 months | −0.05 | 0.12 | [−0.34, 0.33] | 9 % | ||
| Change in height (z) from start of medication to +12 months | −0.11 | 0.18 | [−0.66, 0.44] | 13 % | ||
| Change in height (z) from start of medication to last available visit | −0.16 | 0.39 | [−1.13, 1.10] | 10 % |
Note. SD = standard deviation, Min = minimum, Max = maximum, AUXAL = structural auxologic analysis model, BMI = body mass index, ADHD = Attention-Deficit/Hyperactivity Disorder, ODD = Oppositional Defiant Disorder, MPH = methylphenidate, kg = kilograms. Based on available data from N = 141 participants.