... Child and Adolescent Psychiatry and Mental Health 2008, 2:13 Co-morbidity of psychiatric disorders in children with nail biting and psychiatric characteristic of their parents in a clinical sample ... Helsinki, 1975, as revised in 2000 Analysis The data were statistically analyzed with SPSS Chisquared analysis was used for categorical data and continuous data was analyzed using non-parametric ... Mohammadi MR, Davidian H, Noorbala AA, Malekafzali H, Naghavi HR, Pouretemad HR, Yazdi SA, Rahgozar M, Alaghebandrad J, Amini H, Razzaghi EM, Mesgarpour B, Soori H, Mohammadi M, Ghanizadeh A: An epidemiological...