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Table 1 Demographic and Clinical Characteristics of Prison Survey Sample

From: Attention Deficit Hyperactivity Disorder (ADHD) among longer-term prison inmates is a prevalent, persistent and disabling disorder

Study sample (n = 315) Responders
(n = 194)
Non
responders a
(n = 121)
p
Men, n (%) 194 (100) 121 (100)  
Age, median b (IQR), y 31.3 (14) 29.4 (12) .028d
Conviction time, median b (IQR) c , months 69 (66) 60 (54) .030d
  1. aNon-responders were defined as those approached but actively refused to take part, those who consented but not returned questionnaires, and those who returned unanswered questionnaires; bMedians were used as measures of central tendencies as age and conviction time were non-normally distributed; c IQR: Interquartile range; dMann-Whitney U-test was employed due to non-normal distributed data.