Table 3.

Bivariate analyses. Drop-out and patient, therapist, and implementation factors

Variable	DF*	p-value	Odds ratio	Confidence intervals Lower CI Upper CI		Cramer’s V estimate (Lower CI – Upper CI)
Patient factors
Age (< 15)	1032	.016	0.65	0.44	0.93	0.07 (0.02–0.13)
Gender (girl)	1066	.271	1.25	0.85	1.90	0.03 (0.00–0.09)
>  = 3 trauma experiences	751	< .001	1.74	1.17	2.60	0.04 (0.00–0.07)
PTSS pretreatment (total score > 33)	1238	.104	1.32	0.94	1.85	0.05 (0.00–0.10)
Therapist factor (educational background)
Bachelor	951	.722	1.11	0.52	2.13	0.01 (0.00–0.08)
Master	951	.837	1.05	0.65	1.66	0.01 (0.00–0.07)
Medicine	951	.363	0.75	0.38	1.35	0.03 (0.00–0.08)
Psychologist	951	.766	1.06	0.71	1.61	0.01 (0.00–0.08)
Implementation factor
Implementation strategy 1	1238	.008	0.60	0.41	0.87	0.08 (0.03–0.13)
Implementation strategy 2	1238	< .001	2.19	1.54	3.12	0.13 (0.07–0.20)
Implementation strategy 3	1238	.373	0.80	0.49	1.28	0.03 (0.00–0.07)
Implementation strategy 4	1238	.327	0.80	0.50	1.24	0.02 (0.00–0.07)

*Sample size is indicated by the degrees of freedom (DF) + 1. The sample size for each parameter varies due to missing values in the data set