Table 3.

Prediction of surgery anxiety before (t1), after (t2) intervention, and after surgery (t3).

	Self-report		Self-report		Parent report		Parent report
	State-anxiety		Trait-anxiety		State-anxiety		Trait-anxiety
	Effect	SE	Effect	SE	Effect	SE	Effect	SE
Fixed effects
Constant	3.23	3.65	−6.38	5.69	10.05	3.73	21.96	6.26
Age in years	0.57*	0.26	1.32**	0.41	−0.08	0.27	−0.25	0.45
Gender (boys)	−2.91*	1.30	−3.11	2.04	0.98	1.33	1.15	2.22
Native speaker (no)	3.09	1.76	6.28*	2.74	4.37*	1.75	4.65	2.94
Previous surgeries (yes)	−1.99	1.29	−0.85	2.02	−0.98	1.30	−2.31	2.15
Surgery region (extremities)	1.29	1.73	3.67	2.72	1.24	1.72	1.26	2.87
Time
t1-t2	−1.30*	0.54	−2.14***	0.57	−1.24***	0.33	−2.15**	0.81
t1-t3	−3.06**	0.94	−2.24*	1.09	−6.74***	0.94	−3.38*	1.30
Group (video)	0.91	1.35	1.31	1.05	−1.18	0.33	0.55	2.34
Time × group (video)
t1-t2 × group	0.29	0.74	−0.50	0.79	0.22	0.47	−1.66	1.15
t1-t3 × group	−1.95	1.30	−0.68	1.51	1.81	1.36	−0.93	1.88
Model fit (BIC)	1514.5	1639.2	1336.6	1587.6

Longitudinal Mixed Model, n = 90 children, Raw scores of the State-Trait Operation Anxiety Inventory, BIC, Bayesian Information Criterion,

^*p ≤ 0.05,

^**p ≤ 0.01,

^***p ≤ 0.001.