Faculty Bibliography

Evidence-based medicine (EBM) is defined as a set of processes that facilitate the conscientious, explicit, and judicious integration of individual clinical expertise with the best available external clinical evidence from systematic research in making decisions about the care of individual patients. EBM focuses not only on grading the strength of the evidence but also on the processes and tools that are necessary for clinicians to continually upgrade their knowledge and skills for those problems encountered in daily practice. This article, authored by members of the Duke Pediatric Psychiatry EBM Seminar Team, (1) describes EBM as applied to the training of child and adolescent psychiatrists in the Division of Child and Adolescent Psychiatry, Department of Psychiatry at Duke University Medical Center; (2) presents a simplified discussion of EBM as a technology for training and patient care; (3) discusses the basic principles and procedures for teaching EBM in the setting of a multidisciplinary training program; and (4) briefly mentions two training and research initiatives that are furthered by incorporating EBM.

OBJECTIVE: To review recent progress in child and adolescent psychiatric epidemiology in the area of prevalence and burden. METHOD: The literature published in the past decade was reviewed under two headings: methods and findings. RESULTS: Methods for assessing the prevalence and community burden of child and adolescent psychiatric disorders have improved dramatically in the past decade. There are now available a broad range of interviews that generate DSM and ICD diagnoses with good reliability and validity. Clinicians and researchers can choose among interview styles (respondent based, interviewer based, best estimate) and methods of data collection (paper and pencil, computer assisted, interviewer or self-completion) that best meet their needs. Work is also in progress to develop brief screens to identify children in need of more detailed assessment, for use by teachers, pediatricians, and other professionals. The median prevalence estimate of functionally impairing child and adolescent psychiatric disorders is 12%, although the range of estimates is wide. Disorders that often appear first in childhood or adolescence are among those ranked highest in the World Health Organization's estimates of the global burden of disease. CONCLUSIONS: There is mounting evidence that many, if not most, lifetime psychiatric disorders will first appear in childhood or adolescence. Methods are now available to monitor youths and to make early intervention feasible.

This article argues that the quality of diagnostic tools used to measure anxiety disorders in children and adolescents has improved enormously in the past few years. As a result, prevalence estimates are less erratic, understanding of comorbidity is increasing, and the role of impairment as a criterion for "caseness" is considered more carefully. Several of the instruments developed for epidemiologic research are now being used in clinical settings. Further integration of laboratory methods and clinical and epidemiologic ideas will benefit children with anxiety disorders and their families.

Three dimensions of temperament -- difficult temperament, unadaptablility and unsociability -- were assessed in the first year of life by maternal interview in twins born in Puerto Rico during 2001 and 2002. Eight hundred and sixty-five eligible mothers (80%) were traced and interviewed. Model-fitting results showed that additive genetic factors and the individual specific environment contributed to variation in all three dimensions. In addition, the pattern of variances and correlations suggested that sibling contrast effects influence ratings of difficult temperament. Moderate effects of the shared environment contributed to ratings of adaptability and sociability. There was a significant genetic correlation between difficult temperament and unadaptability. Genetic and environmental effects do not differ significantly between boys and girls. The study is the first population-based study of Puerto Rican twins and one of few to attempt the assessment of behavior in the first year. Preliminary results for difficult temperament and sociability were consistent with those in other populations and ages. In contrast, a significant effect of the shared environment on the temperamental trait of unadaptability has not been reported previously.

The purpose of the study was to better understand past findings of nasal chemosensory hypersensitivity in pregnant women by recording chemosensory event-related potentials (CSERPs) for information about cortical neuronal allocation (amplitudes) and temporal processing (latencies) of three concentrations of pyridine ranging from predominantly olfactory to trigeminal in activation in 15 pregnant and 15 non-pregnant women. CSERP components of primarily sensory (N1 and P2) and cognitive (P3) origin were evaluated. The results displayed no group differences in either N1 or P2 amplitudes or latencies, but tendencies of larger amplitudes and shorter latencies for P3 in pregnant women. This implies that pregnant women's hypersensitivity may more likely be referred to cognitive than sensory processing.

Anormal chemosensory perception has been identified as a possible mechanism underlying odor intolerance, but research in this domain has yet been rather limited. The main objective of the present study was to investigate total perceived intensity, unpleasantness, sensory irritation, and cortical activity assessed with chemosensory event-related potentials (ERPs) for three concentrations of pyridine ranging from predominantly olfactory to trigeminal in activation. Results from 19 individuals with self-reported chemical hypersensitivity and 19 controls with self-reported normal chemical sensitivity show that the hypersensitive group, compared to controls, rated the pyridine stimuli to be more intense and unpleasant, and that these group differences increased with pyridine concentration. Sensory irritation was also the perceptual dimension found to correlate strongest with score on the chemical sensitivity scale. However, no group differences were found in ERP amplitudes or latencies. These findings suggest that self-reported chemical hypersensitivity (1) can be associated with anormal chemosensory perception, (2) may be more closely related to trigeminal function than to olfaction, and (3) has a neural basis at a higher cortical level than that captured by chemosensory ERPs.

The authors sought to examine how parental preference match for service and various types of barriers to service relate to involvement in urban child mental health care. A single-group longitudinal design was used to examine whether service use at an outpatient child mental health clinic was related to parents receiving the type of service they reported wanting for their child at intake and various types of barriers to service. Families who received the service parents reported wanting for their child attended on average 2 treatment sessions more, whereas barriers were unrelated to service use. Considering parent preference for child mental health service may be an effective strategy in increasing service involvement in urban child mental health care.

OBJECTIVES: South Africa is reported to have one of the highest rates of sexual violence in the world, with adolescent girls between the ages of 12-17 being particularly at risk. Given that adolescence is considered a critical developmental period for establishing normative sexual behavior, this study explored multiple levels of risk influences that render adolescent girls vulnerable to becoming victims of sexual violence and adolescent boys vulnerable to becoming perpetrators of such abuse in one South African community. METHOD: A case study approach using qualitative rapid focused ethnographic methods was used. This involved 10 focus group interviews and 10 individual interviews with a volunteer convenience sample of adolescent boys and girls between the ages of 14 and 16 years. RESULTS: Inductive thematic analysis revealed that there were indeed multiple levels of risk influences for adolescent girls and boys becoming either victims or perpetrators of sexual violence. Using the Theory of Triadic Influence as a framework, influences at the distal socio-cultural/environmental level included traditional notions of masculinity and normalization of inter-personal violence as well as poverty and the commodification of sex leading to rape supportive attitudes. Influences at the proximal situation context/social normative level included high-risk social norms as well as a weak adult and community protective shield. Finally, influences at the intra-personal level included low self-esteem and self-efficacy as well as inter-personal affective anger. CONCLUSION: Given the multiple levels of risk influences that need to be addressed to protect youth from becoming either perpetrators or victims of sexual violence in the South African context, prevention programs should necessarily be comprehensive, developmentally timed, and community-based.