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Table 4 Estimated fixed and random effects for qualitative 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
Parent          
Supportive presencea 58 3.53 (1.38) .013 0.001 (0.11) .993 −0.29 (0.15) .053 1.32 (0.65) .044
Respect child autonomya 58 2.18 (1.83) .238 0.12 (0.14) .409 −0.23 (0.19) .249 1.75 (1.17) .137
Cognitive developmentb 58 4.21 (1.67) .015 0.15 (0.14) .277 −0.39 (0.18) .034 0.39 (3.54) .912
Hostilitya 58 −0.08 (1.25) .947 0.002 (0.10) .981 0.01 (0.13) .940 1.21 (0.55) .028
Confidencea 58 1.19 (1.46) .419 −0.05 (0.11) .659 −0.09 (0.15) .574 1.04 (0.71) .139
Child          
Enthusiasmc 58 0.15 (1.45) .919 −0.005 (0.11) .963 −0.04 (0.14) .788 0.91 (0.56) .102
Negativityc 58 0.34 (1.41) .808 −0.15 (0.10) .149 −0.01 (0.14) .934 0.04 (0.35) .899
Persistencea 58 1.75 (1.69) .303 −0.04 (0.13) .745 −0.18 (0.18) .325 1.95 (0.99) .047
Affectionc 58 2.48 (1.38) .077 0.07 (0.10) .511 −0.24 (0.13) .078 0.52 (0.43) .225
Dyadic          
Felt securityc 58 3.46 (1.55) .030 0.11 (0.11) .340 −0.33 (0.15) .034 1.00 (0.60) .096
  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 compound symmetry heterogeneous.
  4. cRepeated measures covariance structure is diagonal.
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