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Clinical symptomatology and socio-demographic factors have not been characterized in Jamaican adolescents with HIV/AIDS.We studied these factors in 25 HIV-positive Jamaican adolescents, 10-19 years of age, who were seen at the Centre for HIV/AIDS Research, Education, and Services (CHARES) between the years 1996 and 2002. Data were collected between June 2003 and August 2003 from CHARES social work files and The University Hospital of the West Indies (UHWI) medical records. Microsoft Excel was used to compile descriptive statistics for the data.The mean age of HIV diagnosis was 15.6 (+/-3.09) years, and the mean age of enrollment at CHARES was 16.3 (+/- 2.9) years. Consensual sexual intercourse was the most prominent mode of transmission (56%), followed by vertical transmission (16%), unknown (16%), forced sexual intercourse (8%), and blood transfusion (4%). The predominant clinical presentations among these adolescent patients were generalized dermatitis (77.2%) and lymphadenopathy (50%). Of the patients for whom clinical status could be determined, 70% were "Severely Symptomatic ". Of these patients only 14% were recommended for antiretroviral treatment.These findings reinforce the need to globally incorporate the goal of the 2002 Joint United Nations Programme on HIV/AIDS (UNAIDS) "to provide reproductive health services, including low-cost or free condoms, voluntary counselling and testing, diagnosis and treatment of sexually transmitted diseases and infections for adolescents in order to effectively prevent HIV infection " (1).

$\textbf{Background:}$ The association between prenatal exposure to maternal cigarette smoking (PEMCS) and adult cognition is debated, including if there are differences according to sex. We aimed to determine if there are associations between PEMCS and cognition in early adulthood in men and women and examine if observed associations were mediated by adolescent mental health factors that are associated with cognition, namely psychotic-like experiences (PLEs), inattention and hyperactivity, and other externalizing behaviors. $\textbf{Methods:}$ Participants were 471 individuals drawn from the general population-based Northern Finland 1986 Birth Cohort (NFBC 1986) followed up from pregnancy and birth to early adulthood; individuals with PEMCS were matched with those without PEMCS by socioeconomic and demographic factors. Cognitive performance in adulthood was assessed with a range of tests and their association with PEMCS was measured by sex using hierarchical linear regression, unadjusted and then controlling for potential confounders, mediators and moderators, including adolescent mental health factors. $\textbf{Results:}$ There were no associations between PEMCS and cognitive scores in females. In males, there were associations with vocabulary (beta = -0.444, 95% CI: -0.783, -0.104) and matrix reasoning (beta = -0.379, 95% CI: -0.711, -0.047). $\textbf{Conclusions:}$ While associations between PEMCS and cognition were limited, observed findings with measures of general intelligence in males contribute to suggestions of differences in response to PEMCS by sex. Furthermore, observed associations may be partly mediated by earlier inattention and hyperactivity. Findings add support to efforts aimed to eliminate smoking in pregnancy.