Table 6.
Results from the primary mixed effects model of ADHDa symptom severity.
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Average item response | ||||
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Estimates (95% CI) | P value |
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| Predictors |
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(Intercept) | 2.02 (1.87 to 2.17) | <.001b |
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Months from baseline | –0.16 (–0.24 to –0.08) | <.001b |
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Symptom type (inattention) | 0.08 (–0.08 to 0.24) | .32 |
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Symptom type (oppositional) | –0.31 (–0.48 to –0.14) | <.001b |
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Months from baseline × symptom type (inattention) | –0.02 (–0.12 to 0.08) | .68 |
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Days from baseline × symptom type (oppositional) | 0.19 (0.08 to 0.29) | <.001b |
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| Random effects ( marginal R2/conditional R2=0.111/0.462) | |||||
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σ2 | 0.22 | N/Ac |
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τ00 member identification | 0.14 | N/A |
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ICCd | 0.39 | N/A |
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Nmember identification | 107 | N/A |
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Observations, N | 333 | N/A |
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aADHD: attention-deficit/hyperactivity disorder.
bSignificant values.
cN/A: not applicable.
dICC: interclass correlation coefficient.