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Table 3 Incident Risk Rations from Negative Binomial Regression with Fixed Effects for Monthly Rates of Solitary Confinement & Violent Infractions (2010–2019)

From: “We just needed to open the door”: a case study of the quest to end solitary confinement in North Dakota

  Incident Rate Ratio 95% CI p-value
NDSP
 All Violent Infractions 1.0001 0.992 1.009 0.886
 Violence Against Staff 1.003 0.980 1.026 0.781
 Fights between incarcerated people 0.995 0.983 1.006 0.363
Assaultsbetween incarcerated people 0.995 0.979 1.011 0.551
JRCC
 All Violent Infractions 1.034 1.019 1.052 0.00*
 Violence Against Staff 1.050 1.016 1.085 0.003*
 Fights between incarcerated people 1.026 1.006 1.047 0.011*
 Assaults 1.011 0.985 1.037 0.412
Combined
 All Violent Infractions 1.012 1.005 1.019 0.001*
 Violence Against Staff 1.016 0.999 1.033 0.064
  Fights between incarcerated people 1.006 0.997 1.016 0.150
 Assaults between incarcerated people 1.003 0.990 1.015 0.683