Biomedical subjects

N Dorr

Publications and source records attributed to N Dorr.

6 recordsLinked to original sources

PubMed2001

Status differences and in-group bias: a meta-analytic examination of the effects of status stability, status legitimacy, and group permeability.

This work examines the moderating effects of status stability, legitimacy, and group permeability on in-group bias among high- and low-status groups. These effects were examined separately for evaluative measures that were relevant as well as irrelevant to the salient status distinctions. The results support social identity theory and show that high-status groups are more biased. The meta-analysis reveals that perceived status stability, legitimacy, and permeability moderate the effects of group status. Also, these variables interacted in their influences on the effect of group status on in-group bias, but this was only true for irrelevant evaluative dimensions. When status was unstable and perceived as illegitimate, low-status groups and high-status groups were equally biased when group boundaries were impermeable, compared with when they were permeable. Implications for social identity theory as well as for intergroup attitudes are discussed.

Hierarchy, Social↗

PubMed1999

A meta-analysis of fibromyalgia treatment interventions.

OBJECTIVE: To evaluate and compare the efficacy of pharmacological and nonpharmacological treatments of fibromyalgia syndrome (FMS). METHODS: This meta-analysis of 49 fibromyalgia treatment outcome studies assessed the efficacy of pharmacological and nonpharmacological treatment across four types of outcome measures-physical status, self-report of FMS symptoms, psychological status, and daily functioning. RESULTS: After controlling for study design, antidepressants resulted in improvements on physical status and self-report of FMS symptoms. All nonpharmacological treatments were associated with significant improvements in all four categories of outcome measures with the exception that physically-based treatment (primarily exercise) did not significantly improve daily functioning. When compared, nonpharmacological treatment appears to be more efficacious in improving self-report of FMS symptoms than pharmacological treatment alone. A similar trend was suggested for functional measures. CONCLUSION: The optimal intervention for FMS would include nonpharmacological treatments, specifically exercise and cognitive-behavioral therapy, in addition to appropriate medication management as needed for sleep and pain symptoms.

Activities of Daily Living↗

PubMed1999

Psychosocial correlates of voluntary HIV antibody testing in college students.

Although past research has examined correlates of HIV testing, much of it has focused on demographic differences between tested and nontested individuals. The present study examined psychosocial differences between individuals seeking a voluntary HIV test at a college student health center and individuals who have never had an HIV test. Variables included in the model were four components of the health belief model (perceived susceptibility, perceived severity, perceived benefits, perceived barriers), as well as perceived norms, consideration of future consequences, and risky sexual behavior. Results suggest that individuals seeking an HIV test perceived more benefits of having a test, tended to perceive fewer barriers to having a test, were higher in consideration of Future Consequences, and engaged in riskier sexual behavior than individuals never having had an HIV test. Implications for both HIV testing interventions and the health belief model are discussed.

AIDS Serodiagnosis↗

PubMed1997

Interrelationships between herd management practices and udder health status using canonical correspondence analysis.

The relationships between the herd-level distribution of udder health measures (traumatic, physical, functional and congestive udder disorders, clinical mastitis and somatic cell counts (SCC) greater than 400 x 10(3) ml-1) and farm (general hygiene, milking practices and housing system) and aggregated individual characteristics were studied by canonical correspondence analysis (CCA). This is a correspondence-analysis technique in which the axes representing disease patterns are expressed as linear combinations of potentially explanatory variables. These main axes can be drawn so that the distribution of diseases for combinations of the main-explanatory managerial variables can be visualized. The type of quarantine for newcomers, type of animal housing, presence of shelter at pasture, use of udder towel before milking, milk production and loss of body condition after calving, were strongly correlated with udder health status. Mastitis and physical udder disorders were associated with the combination of no introduction of replacement heifers and low loss of body condition after calving. Congestive disorders were more common on farms when no quarantine for newcomers was combined with high loss of body condition after calving. Higher clinical and subclinical mastitis incidence risks were associated with the combination of no udder towel, loose housing with high animal density and high milk production. In most cases, clinical mastitis and high SCC were explained by the same covariates but with contrasting levels of those covariates.

Animal Husbandry↗

PubMed1994

Farming practices associated with the 'udder infection' complex.

A total of 4,129 dairy cows from 47 dairy farms were submitted each year after calving to a milk sampling for bacteriological examination. Six criteria defined the udder infection complex: frequency of minor, major and rare pathogens; rate of clinical and subclinical mastitis; and index of gravity of mastitis. Forty-seven variables described practices and their associations with the type of farms (defined by the above 6 criteria) were studied. The associated variables were dipping practices, covering of the milking parlour, disinfection practices, housing cleanliness and milk production.

Animal Husbandry↗

PubMedDate not supplied

Relationship between individual-cow udder health status in early lactation and dairy cow characteristics in Brittany, France.

Data from a 4-year ecopathological survey involving 47 dairy farms in Brittany (France) were used to determine the individual animal characteristics associated with the udder health profiles of clinical and subclinical mastitis, and the presence of minor or major pathogens in milk during early lactation. Herd effect was taken into account and a within-herd analysis using factorial correspondence analysis and a decomposition of chi-square distance was performed. In primiparous cows, the main association observed was between milk production and intramammary infections with major pathogens. The dirtiness score showed contradictory relationships with udder health profiles. The indoor/outdoor transition period was unfavourable for udder health status; since the frequency rate of subclinical and clinical mastitis increased during this period. In multiparous cows, intramammary infections by minor or major pathogens were closely associated with non-infectious udder diseases, but the main effect was due to parity. Old cows were generally affected by higher somatic cell counts than younger cows regardless of whether the SCC were associated with clinical mastitis or not.

Animal Feed↗