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Table 2 Incidents of self-harm during follow-up – by prison and gender

From: Assessing the predictability of self-harm in a high-risk adult prisoner population: a prospective cohort study

  Prison A Prison B (Female) Prison C Total Male Prisons
N 105 115 230 450 335
N with valid follow up 102 111 220 433 322
Total number of self-harm events reported during follow-up 50 207 166 423 216
Total number of prisoner follow-up days 13,470 13,074 40,245 66,789 53,715
Event Incidence per 1000 prisoner-days 3.71 15.83 4.12 6.33 4.02
Total number of people with self-harm events reported during follow-up 17 (16.7%) 37 (33.3%) 72 (32.7%) 126 (29.1%) 89 (27.6%)
Person self-harm Incidence per 1000 prisoner-days 1.26 2.83 1.79 1.89 1.66
self-harm event – person ratio 2.94 5.59 2.31 3.36 2.43