. Author manuscript; available in PMC: 2016 Dec 1.

Published in final edited form as: Behav Res Ther. 2015 Oct 14;75:11–19. doi: 10.1016/j.brat.2015.10.003

Table 5.

Relationship Between Challenging Behaviors and Frequency of Self-Directed Violence Using Hurdle Model

	Zero (logistic regression)			Count (negative binomial regression)

	OR	Lower	Upper	RR	Lower	Upper
Factor 1: Interpersonal negativity^a	0.55^†	0.26	1.12	1.37	0.47	4.02
Factor 2: Avoidant/disengaged^a	2.05^*	1.06	3.97	2.75^*	1.12	6.73
Frequency of out-of session coaching^b	1.45	0.79	2.67	0.82	0.33	2.04
Were therapist’s out-of-session limits observed	1.63	0.30	8.89	0.45	0.07	2.76

Note. Bold indicates significant difference.

For ease of comparison given different item counts in challenging behavior subscale scores, analysis was conducted on z-scored subscale scores.

Because of outliers and skew, frequency of out of session coaching was log-transformed.

p <. 05

^†

p <. 10