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. Author manuscript; available in PMC: 2022 Apr 1.
Published in final edited form as: J Trauma Acute Care Surg. 2021 Apr 1;90(4):722–730. doi: 10.1097/TA.0000000000003056

Table 3.

Risk of subsequent injury following hospital discharge for initial firearm injury among the intervention group compared to the control group, HiFi Study, 2016-2019

Intent-to-treat
Per-Protocol Effect
Number
of Events
Unadjusted
Cumulative
Incidence
(95% CI)
Unadjusted Relative
Risk
(95% CI)
Adjusted Cumulative
Incidencea (95% CI)
Relative Riska
(95% CI)
Adjusted Cumulative
Incidenceb (95% CI)
Relative Riskb
(95% CI)
Injury – 1 year
 Control 14 13.0 (6.4, 19.1) 1.00 (ref) 13.3 (7.8, 19.5) 1.00 (ref) 14.2 (6.9, 27.9) 1.00 (ref)
 Intervention 23 20.5 (12.6, 27.7) 1.58 (0.80, 3.40) 20.2 (13.3, 27.7) 1.52 (0.92, 2.68) 17.1 (8.2, 33.5) 1.21 (0.81, 1.63)
Injury – 2 years
 Control 18 18.1 (10.0, 25.5) 1.00 (ref) 17.9 (10.9, 25.2) 1.00 (ref) 23.4 (12.0, 37.9) 1.00 (ref)
 Intervention 28 26.8 (17.6, 35.1) 1.48 (0.79, 2.85) 26.6 (18.5, 35.4) 1.49 (0.94, 2.55) 27.3 (14.0, 43.7) 1.16 (0.56, 3.34)
a

Adjusted for prior arrest, stable living, age, and injury intent.

b

Adjusted prior arrest, stable living, age, and injury intent at baseline, and stable housing collected post-randomization at the 1 and 3-month marks.