Evaluation of a prison violence prevention program: impacts on violent and non-violent prison infractions

Table 3 Hazard ratios for association of Rehabilitative Diversion Unit (RDU) completion, compared to restrictive housing for control purposes completion, and first of each outcome within 30 days of exit from an RDU or restrictive housing for control purposes, North Carolina prisons, 2016–2020

	Number of first events	Mean (IQR) days until first event	Unadjusted HR (95% CI)	Adjusted HR^a (95% CI)
Violent infractions^b
Post-RDU	14	11.4 (1.0, 21.0)	2.0 (1.1, 3.8)	2.1 (1.1, 4.0)
Post-RHCP	26	12.4 (2.0, 21.0)	Ref	Ref
Alt-violent infractions^c
Post-RDU	8	15.4 (4.0, 24.5)	1.2 (0.5, 2.6)	1.3 (0.6, 2.8)
Post-RHCP	25	18.1 (12.0, 24.0)	Ref	Ref
Drug-related infractions^d
Post-RDU	8	11.8 (2.0, 21.0)	1.0 (0.4, 2.1)	1.0 (0.5, 2.2)
Post-RHCP	31	11.6 (5.0, 20.0)	Ref	Ref
Any infractions
Post-RDU	76	11.4 (1.0, 20.0)	1.2 (0.9, 1.5)	1.2 (1.0, 1.6)
Post-RHCP	253	13.8 (6.0, 21.0)	Ref	Ref
A-level infractions^e
Post-RDU	38	11.0 (1.0, 21.0)	1.1 (0.8, 1.6)	1.2 (0.8, 1.7)
Post-RHCP	129	13.6 (6.0, 21.0)	Ref	Ref
B-level infractions^f
Post-RDU	47	12.4 (2.0, 21.0)	1.3 (0.9, 1.8)	1.4 (1.0, 1.9)
Post-RHCP	142	14.3 (6.0, 22.0)	Ref	Ref
C-level infractions^g
Post-RDU	6	9.5 (1.0, 14.0)	0.6 (0.3, 1.4)	0.7 (0.3, 1.6)
Post-RHCP	38	13.2 (7.0, 19.0)	Ref	Ref
Movement from close to medium custody
Post-RDU	27	15.4 (11.0, 21.0)	17.4 (7.2, 42.1)	17.4 (7.2, 42.2)
Post-RHCP	6	16.3 (9.0, 22.0)	Ref	Ref

CI confidence interval, HR hazard ratio, IQR interquartile range, RDU rehabilitative diversion unit, RHCP restrictive housing for control purposes
^aAdjusted for age, gang affiliation, IQ, the number of days they had been in restrictive housing up to that point/days incarcerated that incarceration, the number of guilty infractions up to that point/days incarcerated that incarceration, and their mental health grade
^bViolent infractions are not an official NC DAC categorization. Violent infractions include assault and rioting
^cAlt-violent infractions are not an official NC DAC categorization. Alt-violent infractions are infractions that indicate a potential for violence. These include threatening to harm staff and assault with a low potential for injury
^dDrug-related infractions are substance possession or refusing to submit to a drug or breath test
^eA-level infractions include gang involvement, possession of a weapon to aid in assault, insurrection, riot, setting a fire, assaulting staff, and substance possession
^gB-level infractions include disobeying an order, lock tampering, use of profane language, and threatening to harm staff
^gC-level infractions include unauthorized use of phones or mail, possession of contraband not intended for escape or violence, creating an offensive condition, or bartering or loaning money

ISSN: 2197-1714