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Table 1 Demographic data of the patients and controls

From: Zinc, ferritin, magnesium and copper in a group of Egyptian children with attention deficit hyperactivity disorder

ITEM Patients no = 58 Controls no = 25 p-value
Age in years Range 5-13 5-15 0.6
  Mean ± SD 8.3 ± 1.8 8.6 ± 3.1  
Sex Male 26(44.2%) 12(48%) 0.8
  Female 32(55.8%) 13(52%)  
Residence Urban 29(50%) 17(68%) 0.1
  Rural 29(50%) 8(32%)  
Smoking (Paternal or maternal) Positive 48(82.8%) 16(64%) 0.04*
  Negative 10(17.2%) 9(36%)  
Family history of ADHD Positive 38(65.5%) 4(16%) 0.007**
  Negative 20(34.5%) 21(84%)  
  1. * = significant
  2. ** = highly significant