Table 4.
Differences in slopes at each stage and AUC between the three embedded adaptive interventions.
| Difference / Effect Size (95% CI for Difference) | |||||||
|---|---|---|---|---|---|---|---|
| (SGD, SGD) vs (No SGD, No SGD) |
(SGD, SGD) vs (No SGD, SGD) |
(No SGD, SGD) vs (No SGD, No SGD) |
|||||
| Stage 1 Slope* |
Stage 2 Slope |
AUC | Stage 2 Slope |
AUC | Stage 2 Slope** |
AUC | |
| Natural Language Sample |
|||||||
| TSCU |
1.94 / 0.8 (0.7,3.2) |
−0.13 / −0.05 (−0.9,0.6) |
18.6 / 0.67 (8,29) |
−0.46 / −0.18 (−1.2,0.3) |
15.7 / 0.58 (6,25) |
0.33 / 0.13 (−0.05,0.8) |
2.6 / 0.1 (−0.4,5.6) |
| NDWR | 0.79 / 0.46 (−0.1,1.7) |
0.01 / 0.01 (−0.33,0.37) |
8.1 / 0.37 (−0.2,16.3) |
−0.18 / −0.13 (−0.62,0.27) |
6.5 / 0.30 (−1.7,14.8) |
0.19 / 0.13 (−0.05,0.43) |
1.5 / 0.07 (−0.4,3.4) |
| Early Social Communication Scale |
|||||||
| IJA |
0.36 / 0.43 (0.02,0.7) |
−0.08 / −0.1 (−0.28,0.13) |
2.9 / 0.43 (0.39,5.5) |
−0.15 / −0.18 (−0.36,0.06) |
2.4 / 0.35 (−0.1,4.8) |
0.07 / 0.08 (0.004,0.13) |
0.54 / 0.08 (0.03,1.0) |
| IBR | 0.17 / 0.21 (−0.2,0.6) |
0.03 / 0.03 (−0.21,0.27) |
1.9 / 0.24 (−0.7,4.5) |
−0.03 / −0.03 (−0.28,0.22) |
1.5 / 0.19 (−1.3,4.3) |
0.05 / 0.06 (−0.05,0.15) |
0.4 / 0.05 (−0.4,1.1) |
| Structured Play Assessment |
|||||||
| UPA | −0.11 / −0.16 (−0.4,0.2) |
0.14 / 0.24 (−0.05,0.3) |
0.03 / 0 (−2.1,2.1) |
0.13 / 0.23 (−0.07,0.33) |
−0.03 / 0 (−2.2,2.2) |
0.01 / 0.01 (−0.07,0.09) |
0.06 / 0.01 (−0.6,0.7) |
Notes.
Abbreviations: SGD—Speech generating device; TSCU—Total socially communicative utterances; NDWR— Number of direct word roots; IJA—Initiating joint attention; IBR—Initiating behavioral regulation; UPA— Unique play acts; AUC—the average area under the estimated longitudinal curve from baseline to week 36 (has the interpretation as the average outcome over the course of the study).
Comparisons with a 95% confidence interval that does not include zero are boldfaced.
The stage 1 slopes comparison for (SGD, SGD) vs (No SGD, No SGD) and (SGD, SGD) vs (No SGD, SGD) are identical; hence we report it only once in the (SGD, SGD) vs (No SGD, No SGD) column.
The two adaptive interventions beginning with No SGD have identical stage 1 slopes; hence, for the (No SGD, SGD) vs (No SGD, No SGD) comparison, we only report a stage 2 pair-wise comparison.