TABLE 2.
Summary of the multinomial logistic regression models predicting subgroup membership using early correlates, intervention intensity, and T1 to T2 behavioral changes
| CHG versus ID | P‐High versus ID | |||||
|---|---|---|---|---|---|---|
| Estimate | OR [95% CI] | p‐value | Estimate | OR [95% CI] | p‐value | |
| Early correlate (T1) | ||||||
| ADOS‐2 CSS | −0.33 | 0.72 [0.61–0.83] | <0.001 | −0.51 | 0.60 [0.50–0.73] | <0.001 |
| VABS communication | 0.11 | 1.12 [1.09–1.15] | <0.001 | 0.19 | 1.21 [1.16–1.26] | <0.001 |
| CBCL internalizing | −0.003 | 1.00 [0.97–1.02] | 0.83 | 0.006 | 1.01 [0.97–1.04] | 0.75 |
| CBCL externalizing | 0.02 | 1.02 [0.999–1.04] | 0.06 | −0.0001 | 1.00 [0.97–1.03] | 0.99 |
| Total intensity of services received | −0.05 | 0.95 [0.75–1.20] | 0.66 | −0.04 | 0.96 [0.69–1.35] | 0.83 |
| T1 to T2 behavioral change | ||||||
| ADOS‐2 CSS | −0.08 | 0.93 [0.77–1.12] | 0.43 | −0.31 | 0.73 [0.58–0.92] | 0.007 |
| VABS communication | 0.08 | 1.08 [1.04–1.12] | <0.001 | 0.05 | 1.05 [1.01–1.09] | 0.02 |
| CBCL internalizing | −0.05 | 0.95 [0.91–1.00] | 0.052 | −0.01 | 0.99 [0.94–1.04] | 0.57 |
| CBCL externalizing | −0.08 | 0.93 [0.88–0.97] | 0.001 | −0.02 | 0.98 [0.94–1.03] | 0.37 |
Note: Early correlates are defined as scores at T1; T1 to T2 Behavior Change is defined as the difference between the score at T2 and the score at T1. Models were adjusted for child sex and age. Estimates and ORs are reported for a one‐unit increase in the predictor for all variables except intensity of services received; for this variable, estimates and OR are reported for a one‐standard‐deviation increase.
Abbreviations: ADOS‐2, CSS; Autism, Diagnostic Observation Schedule Calibrated Severity Score; CBCL, Child Behavior Checklist; CHG, Changers; CI, Confidence Interval; ID, Persistent Intellectual Disability; OR, Odds Ratio; P‐High, Persistently High IQ; VABS, Vineland Adaptive Behavioral Scales.