Confirmatory test of two factors and four subtypes of bipolar disorder based on lifetime psychiatric co-morbidity.

BACKGROUND: The first aim was to use confirmatory factor analysis (CFA) to test a hypothesis that two factors (internalizing and externalizing) account for lifetime co-morbid DSM-IV diagnoses among adults with bipolar I (BPI) disorder. The second aim was to use confirmatory latent class analysis (CLCA) to test the hypothesis that four clinical subtypes are detectible: pure BPI; BPI plus internalizing disorders only; BPI plus externalizing disorders only; and BPI plus internalizing and externalizing disorders. METHOD: A cohort of 699 multiplex BPI families was studied, ascertained and assessed (1998-2003) by the National Institute of Mental Health Genetics Initiative Bipolar Consortium: 1156 with BPI disorder (504 adult probands; 594 first-degree relatives; and 58 more distant relatives) and 563 first-degree relatives without BPI. Best-estimate consensus DSM-IV diagnoses were based on structured interviews, family history and medical records. MPLUS software was used for CFA and CLCA. RESULTS: The two-factor CFA model fit the data very well, and could not be improved by adding or removing paths. The four-class CLCA model fit better than exploratory LCA models or post-hoc-modified CLCA models. The two factors and four classes were associated with distinctive clinical course and severity variables, adjusted for proband gender. Co-morbidity, especially more than one internalizing and/or externalizing disorder, was associated with a more severe and complicated course of illness. The four classes demonstrated significant familial aggregation, adjusted for gender and age of relatives. CONCLUSIONS: The BPI two-factor and four-cluster hypotheses demonstrated substantial confirmatory support. These models may be useful for subtyping BPI disorders, predicting course of illness and refining the phenotype in genetic studies.

Children's emotional adaptation to parental BMT.

Few studies have examined the effect of parental BMT on the family and less is known regarding the impact on children. The purpose of this prospective study was to increase understanding of children's adaptation to the stress of parental BMT across a 12-month trajectory. Data were obtained from 61 children ages 10-18 before parental transplant, during parental hospitalization, 1, 4 , 8 and 12 months post BMT. Mixed linear modeling was used to analyze longitudinal data from children nested within families. Analyses examined change in child emotional adaptation, points of greatest vulnerability throughout the BMT trajectory and the impact of theoretically relevant variables on their adaptation. Children's emotional adaptation became significantly more positive over time, although their level of distress remained above the norm. Pre-transplant was the period of greatest emotional distress. Negative self-esteem, disruption within the family structure, use of disengagement coping and the mother as transplant recipient were associated with more negative adaptation. Further research is needed to fully understand the effects of parental BMT on children. However, these findings point to the importance of considering the adaptation of children and its implications for the development of preventive family interventions for this vulnerable population.

Adaptation of family caregivers during the acute phase of adult BMT.

This study examined the course of adaptation as indicated by the level of emotional distress for family caregivers of adult BM recipients across the acute phase of the transplant trajectory. Factors influencing caregivers' adaptation that could be potential markers of vulnerability to psychological and social morbidity were identified. The sample included 192 caregivers of either an autologous or allogeneic BMT recipient. Data were collected by self-report questionnaires at three time points in the trajectory: pre-transplant/pre-hospitalization (T1); during hospitalization, post-infusion (T2); 1 month post-discharge (T3). There was a decline in emotional distress from T1 to T3, and bivariate correlations indicated significant association of distress with variables hypothesized to be theoretically relevant. Specifically, greater personal control, a greater sense of spiritual connectedness, less disruption in the life of the caregiver and less use of avoidance coping were the strongest factors associated with lower emotional distress. In conclusion (1) levels of personal control and spirituality remained stable across time and were negatively associated with emotional distress. Therefore, they may provide an indication of caregiver resilience pre-transplant; (2) level of recipient symptomatology rather than BMT type appears to influence caregiver distress; (3) there are indications of the need for post-hospitalization follow-up with caregivers by the BMT team.

Do benefits and barriers differ by stage of adoption for colorectal cancer screening?

In 2003, over 148,300 people were expected to be diagnosed and 56,000 to die from colorectal cancer (CRC). First-degree relatives (FDRs) of people with colon cancer have a two- to eight-fold increased risk for CRC. Despite evidence that screening is effective, adherence with screening recommendations in this at-risk population is low. This study's purposes were to (1) identify perceived benefits and barriers of fecal occult blood testing (FOBT), sigmoidoscopy and colonoscopy, and (2) compare demographic characteristics and perceived benefits and barriers by stage of adoption for CRC screening. Participating FDRs (n = 257) completed a 40-min structured telephone interview. Despite high rates of agreement with the benefits of screening, most FDRs were not contemplating being screened. Of those 50 and older, most were in precontemplation for FOBT, sigmoidoscopy and colonoscopy. Older age was related to stage for FOBT and sigmoidoscopy, but not colonoscopy. Lack of provider recommendation also was related to stage. Consistent with theoretical predictions, precontemplators had (1) higher rates of endorsement of specific barriers to screening and (2) lower rates of endorsement of benefits than contemplators or actors. For morbidity and mortality reduction, participation in routine, periodic screening is imperative. These findings can guide development of screening-promoting interventions.