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. 2021 Apr 6;24:100388. doi: 10.1016/j.invent.2021.100388

Table 2.

Intention-to-treat (ITT) linear mixed model analysis of group, time and interaction effects on individual and parental stress.

Fixed effects Individual stress
Parental stress
F df p F df p
Intercept 4162.08 1;273 <.001** 1413.48 1;246 <.001**
Group 0.16 2;214 .865 0.01 2;208 .992
Time 40.66 2;273 <.001** 43.83 2;246 <.001**
Group × time 6.03 4;273 <.001** 1.83 4;246 .124
Random effects Variance L.Ratio p Variance L.Ratio p
Intercept 32.47 226.16 <.001** 77.86 260.92 <.001**
Residual 12.68 17.86
Model fit indices Marginal Conditional Marginal Conditional
Pseudo-R2 .07 .74 .04 .82
AIC 3074 3127
BIC 3120 3172

Note. N = 217 participants (parental stress: 211), 496 observations (parental stress: 463). AIC: Akaike Information Criterion. BIC: Bayesian Information Criterion. Marginal Pseudo-R2 indicates the proportion of variance explained by the fixed factors only, whereas conditional Pseudo-R2 indicates the proportion of variance explained by the overall model. *p < .05, **p < .01.