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Table 5 Estimated fixed and random effects for quantitative observation outcomes from 6-month trial endpoint to 12-month follow-up

From: Primary Care Triple P for parents of NICU graduates with behavioral problems: a randomized, clinical trial using observations of parent–child interaction

  Fixed effects Random effects
Outcome n Intervention P Time P Intervention × Time P Intercept P
Showing affectiona 59 −0.02 (0.41) .967 −0.03 (0.03) .328 0.01 (0.04) .885 0.02 (0.04) .627
Non-descriptive praisea 59 −1.37 (2.23) .543 0.06 (0.18) .738 0.25 (0.24) .288 2.88 (1.68) .087
Descriptive praisea 59 0.02 (0.95) .980 −0.02 (0.08) .779 0.02 (0.10) .845 0.19 (0.28) .490
Incidental teachinga 59 0.24 (0.72) .740 0.09 (0.06) .140 0.004 (0.08) .961 0.22 (0.18) .203
Ask, say, doc 59 0.57 (0.50) .264 0.03 (0.04) .393 −0.07 (0.05) .178 0.13 (433.84) 1.000
Directed discussionb 59 0.14 (0.39) .723 −0.02 (0.03) .470 0.01 (0.04) .753 0.21 (0.06) <.001
Planned ignoringc 59 0.04 (0.24) .859 −0.001 (0.02) .949 0.002 (0.03) .938 0.02 (28.08) .999
Clear, calm instructionsa 59 1.36 (0.80) .095 0.02 (0.06) .698 −0.15 (0.08) .087 0.66 (0.26) .012
  1. Note. Because the random effect has only one level, the covariance structure is scaled identity.
  2. aRepeated measures covariance structure is scaled identity.
  3. bRepeated measures covariance structure is scaled identity diagonal.
  4. cRepeated measures covariance structure is compound symmetry correlation metric.
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