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Table 2 Relation between the scale of violence (modified overt aggression scale) and demographic data (n = 86)

From: Study of attention measured by event-related potential as a predictive factor of violence among patients with schizophrenia and substance use disorder

 NModified overt aggression scaleTest of sig.P
Min.–max.Mean ± SDMedian
Age (years)
 18–< 2063.0–30.019.0 ± 12.0723.0H = 1.7990.773
 20–29330.0–40.014.52 ± 12.9011.0
 30–39260.0–39.013.54 ± 10.749.50
 40–49160.0–40.017.06 ± 14.2112.50
 50–5957.0–35.017.20 ± 10.8714.0
Marital status
 Single630.0–40.014.30 ± 12.659.0U = 576.00.147
 Married230.0–40.017.52 ± 10.8517.0
Educational level
 High56.0–37.022.20 ± 11.6523.0H = 2.2730.321
 Moderate300.0–35.015.50 ± 11.1213.0
 Illiterate510.0–40.014.27 ± 12.869.0
Work
 No630.0–40.014.92 ± 12.7110.0U = 655.500.500
 Yes230.0–37.015.83 ± 10.9713.0
  1. U Mann Whitney test, H H for Kruskal Wallis test, P P value for comparing association between modified overt aggression scale and demographic data
  2. *Statistically significant at P ≤ 0.05