Table 4.
Correlates of Entering Weight Recovery Treatment and Changes in z-BMI, z-Weight, and z-Height in the First 12 Months After Starting Methylphenidate
| Predictor | Δ z-BMI from 0 to 12 months | Δ z-weight from 0 to 12 months | Δ z-height from 0 to 12 months | |||
|---|---|---|---|---|---|---|
| Correlation (SE) | Sig. | Correlation (SE) | Sig. | Correlation (SE) | Sig. | |
| Biometrics | ||||||
| Female | −0.06 (0.09) | −0.09 (0.09) | +0.12 (0.09) | |||
| Age in years at start of medication | +0.22 (0.09) | * | +0.23 (0.09) | * | +0.25 (0.09) | ** |
| Started medication after AUXAL-projected age of slowest growth | +0.13 (0.09) | +0.18 (0.09) | * | +0.23 (0.08) | ** | |
| Height (z) at start of medication | +0.06 (0.09) | +0.12 (0.09) | −0.06 (0.09) | |||
| Weight (z) at start of medication | +0.01 (0.09) | +0.04 (0.09) | +0.08 (0.09) | |||
| BMI (z) at start of medication | −0.04 (0.09) | −0.05 (0.09) | +0.12 (0.09) | |||
| Midparental height in centimeters (measured or reported) | +0.06 (0.09) | +0.12 (0.09) | −0.04 (0.09) | |||
| Biometric deltas | ||||||
| Change in weight (z) from start of medication to +6 months | - | - | +0.28 (0.08) | ** | ||
| Change in weight (z) from start of medication to +12 months | - | - | +0.38 (0.08) | *** | ||
| Symptoms | ||||||
| Parent rating of hyperactivity/impulsivity symptoms of ADHD at study entry | −0.14 (0.09) | −0.15 (0.09) | −0.07 (0.09) | |||
| Parent rating of inattention symptoms of ADHD at study entry | +0.05 (0.09) | +0.04 (0.09) | −0.01 (0.09) | |||
| Parent rating of ODD symptoms at study entry | +0.07 (0.09) | +0.03 (0.09) | −0.10 (0.09) | |||
| Medication | ||||||
| Parent rating of loss of appetite at optimization was moderate/severe | −0.02 (0.09) | −0.10 (0.09) | −0.21 (0.09) | * | ||
| Percent of days medicated in first 12 months after starting medication | −0.37 (0.08) | *** | −0.37 (0.08) | *** | −0.24 (0.09) | ** |
| Total MPH intake (kg) in first 12 months after starting medication | −0.35 (0.08) | *** | −0.35 (0.08) | *** | −0.18 (0.09) | * |
Note. SE = standard error, AUXAL = structural auxologic analysis model, BMI = body mass index, ADHD = Attention-Deficit/Hyperactivity Disorder, ODD = Oppositional Defiant Disorder, MPH = methylphenidate, kg = kilograms.
Correlations are Pearson correlations. “Sig.” indicates statistical significance of correlation. All models were estimated using full-information maximum likelihood and included the 141 children who ever took medication. Auxiliary variables were female, age in years at study entry, entered study after AUXAL-projected age of slowest growth, z-height at study entry, z-weight at study entry, and z-BMI at study entry.
p < .05,
p < .01,
p < .001