. Author manuscript; available in PMC: 2024 Oct 17.

Published in final edited form as: BMJ Public Health. 2024 Jul 8;2(1):e000725. doi: 10.1136/bmjph-2023-000725

Table 3.

Opioid Overdose Prevention and Naloxone Knowledge Among Study Participants over Time, by Trial Arm

Rx-OOKS	Rx-OOKS score* Mean (95% CI)		Difference (95% CI)	Time × intervention P value
	Intervention arm (n=519)	Usual care arm (n=485)	Difference (95% CI)	Time × intervention P value
Time 0	19.3 (18.9, 19.8)	11.4 (11.0, 11.8)	7.97 (7.41, 8.54)	<0.001
4 months	14.8 (14.4, 15.1)	13.2 (12.8, 13.6)	1.57 (1.04, 2.10)
8 months	15.5 (15.1, 15.8)	14.0 (13.6, 14.3)	1.50 (0.95, 2.05)

Abbreviations: Rx-OOKS – Prescription Opioid Overdose Knowledge Scale

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Range of the Rx-OOKS scale is 0–25. Higher Rx-OOKS score represents greater knowledge