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Table 2 Self-reported change in knowledge pre- and post-training

From: Overdose prevention training with naloxone distribution in a prison in Oslo, Norway: a preliminary study

Knowledge domains (points) Pre-training mean (SD) Post-training mean (SD) Mean difference Wilcoxon Z P value
Risk factors (0–9) 8.1 (1.1) 9 (9) 0.94 − 4.128 < 0.001
Signs (0–10) 8.5 (1.2) 9.8 (0.7) 1.36 − 4.005 < 0.001
Actions (0–11) 10.1 (1.2) 10.9 (0.3) 0.8 − 3.372 < 0.001
Naloxone (0–9) 5.5 (1.9) 9 (0.2) 3.52 − 4.730 < 0.001
Total (0–39) 32.1 (3.4) 38.7 (0.7) 6.58 − 4.873 < 0.001
  1. SD standard deviation