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Background&Objective: Comorbidity between ADHD (Attention Deficit Hyperactivity Disorder) and major depression has been reported from both epidemiologic and clinical studies of both children and adults. With the use of family study methods, we tested hypotheses about patterns of familial association between attention deficit hyperactivity disorder (ADHD) and depressive disorder among first-degree relatives of clinically referred children and adolescents with ADHD. Materials&Methods: In this case – control study, were 208 probands with ADHD (aged 5-17 yrs) were diagnosed by clinical interview and the Schedule for Affective Disorders and Schizophrenia for School–Age Children Present and Lifetime version (K–SADS–PL), and they were assessed for major depression with interview and K- SADS. 779 first degree relatives (416 parents, 363 siblings) were assessed with interview and K- SADS (for under 18 yrs) and SADS (for age up to 18 yrs) and Wender (for age up to 18 yrs) for major depression and ADHD. Results: Familial risk for ADHD was similar in the relatives of the ADHD probands. The risk for major depression disorder was three times higher in relatives of probands who had ADHD with depressive disorder than in those of the ADHD probands without depressive disorder. There was a tendency for ADHD probands' relatives who themselves had ADHD to have a higher risk for depressive disorder than ADHD probands' relatives who did not have ADHD (cosegregation). Conclusion: These findings are consistent with the hypothesis that ADHD and major depression disorder cosegregate within families.

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Background and Objective: Polycystic ovarian syndrome (PCOS) is one of the most prevalent (6-10%) endocrine glands disorders among child - bearing women. In addition to the patients, their first degree relatives are exposed to some risk factors such as abnormal lipoproteins. Due to high prevalence PCOS among women and the role of genetic factors in this abnormality, it is necessary to recognize high risk people particularly among first degree relative. Therefore this study was conducted to determine the level of serum lipoproteins in first degree relatives of patients with PCOS. Materials and Methods: This case control study was done on 107 individuals of the first degree relatives of PCOS patients as cases and 107 normal individuals of the first degree of non-PCOS as controls in Shiraz, Iran during 2009. Participants completed a test assessing demographics and blood sample were taken from all participants in order to assay serum lipoproteins including total cholesterol, LDL, HDL and triglyceride. Data was analyzed by means of independent t-test and Fisher's exact test as well as Chi-Square. Results: The means±SD of total cholesterol, HDLc and triglyceride in cases was 191±31.64, 167±4.06 and 191±31.64 mg/dl, respectively. The means±SD of total cholesterol, LDLc and triglyceride in controls was 158.25±18.25, 123±21.33 and 120.42±17.11 mg/dl, respectively. Serum level differences of LDL and triglyceride in cases and controls were significant (P<0.05). The means±SD of HDLc in cases and controls was 40.06±6.95 and 45.9±6.7 mg/dl, respectively (P<0.05). Conclusion: This study showed that the serum level of lipoproteins in the first degree relatives of PCOS patients is significant higher than non-PCOS.