Some non - specific factors that may nfluence the susceptibility to all hepatic etiologies (hepatitis A, B, C) were compared in both SES groups: here were a statistically significant difference (d=0.00) in living surface per person: 61.3% of children in group A lived in apartments or houses larger than 10 m2 area / per whereas 52% of group B had dwelling space less than 3 m2 / pers.