Table 4: Estimated difference in growth between treatment and control from two difference model specifications.

OutcomeLinear growth model1Multiphase growth model1Model fit comparison: AIC3
LinearMultiphase

MBRS Directive Scale Score−0.701 (0.54)−1.419 (0.45)*1.053 (0.561)+130.1123.2
MBRS Responsive Scale Score0.925 (0.536)0.647 (0.541)0.13 (0.677)125.5126.9
CSBS-Behavior Sample Total Standard Score20.896 (0.623)NANA83.7NA
CSBS-Caregiver Question. Total Standard Score21.228 (0.447)*NANA69.7NA
MSEL Expressive Language score0.187 (0.716)0.211 (0.404)−0.252 (0.454)116.2115.1
MSEL Receptive Language score0.928 (0.403)*0.76 (0.485)−0.029 (0.589)123.4123.2
SEQ: Hyperresponsive Scale Mean Score1.38 (0.533)*0.452 (0.373)0.696 (0.419)114.3117.3
SEQ: Hyporesponsive Scale Mean Score−1.023 (0.628)−1.541 (0.478)*0.738 (0.534)131.6127.6
SPA: Hyperresponsive Scale Mean Score0.525 (0.58)0.794 (0.519)−0.447 (0.598)129.0127.4
SPA: Hyporesponsive Scale Mean Score−0.31 (0.517)−0.701 (0.53)0.555 (0.679)131.0130.6
Vineland Expressive Communication -scale score0.614 (0.575)0.79 (0.328)*−0.474 (0.356)108.8106.9
Vineland Receptive Communication -scale score0.874 (0.594)1.34 (0.356)*−0.765 (0.393)+120.4113.0
Vineland Socialization Standard Score1.299 (0.734)+1.178 (0.431)*−0.092 (0.51)117.1115.3

Standard errors in parentheses; 2outcome was only measured on two occasions; 3lower AIC statistics indicate better fit between linear and multiphase models (indicated in bold font between last two columns).
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