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  • 2000-2004  (2)
  • 2003  (2)
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  • 2000-2004  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Addiction 98 (2003), S. 0 
    ISSN: 1360-0443
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: Background  Social capital and a low severity of alcohol-related problems have been focused upon to explain the processes of natural recovery from alcohol dependence. However, studies using control groups have not found significant differences in these variables. Subtypes of natural remission which might account for this inconsistency have only been described on grounds of qualitative data.Aims  To identify subtypes of natural remitters using cluster analysis.Participants  One hundred and seventy-eight media-recruited natural remitters were interviewed personally. Several triggering mechanisms and maintenance factors of remission were assessed using standardized questionnaires. Based on age of onset and severity of dependence, adverse consequences from drinking, social pressure and social support, cluster analyses were performed.Results  Cluster analyses yielded three groups of natural remitters: one cluster with a high severity of dependence, low alcohol-related problems and low social support (‘low problems—low support’; n = 65), one group characterized by high severity of dependence, high alcohol-related problems and medium social support (‘high problems—medium support’; n = 37), and a third group which consisted of subjects with high social support, late age of onset, low severity of dependence, and low alcohol-related problems (‘low problems—high support’; n = 76). Cluster solutions were confirmed using discriminant analyses. Analyses of variance (ANOVAs) revealed further group differences on other triggering and maintaining factors of remission.Conclusions  Failure to identify specific pointers to natural recovery in previous research might be due to heterogeneous subgroups of natural remitters. In order to build a conceptual framework for understanding the processes of natural recovery, interactions of different independent variables should be considered.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Science Ltd
    Journal of fish biology 62 (2003), S. 0 
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Based on results from simulated redds of coho salmon Oncorhynchus kisutch, the amount of fine sediment 〈0·5 mm in the lower half of the egg pocket, rather than the entire egg pocket of the redd, was a strong predictor of egg survival to hatching ( r2 = 0·62). The relationship was much stronger than observed in other studies, which typically ignore egg pocket structure. Abundance of a fish egg-eating worm, Haplotaxis ichthyophagous, an oligochaete that may have been attracted to fine sediment and dead eggs in the egg pocket, was also associated with a decrease in egg survival. The worm, however, accounted for little of the variance in survival compared to fine sediment. Only 10% fine sediment (〈0·5 mm) in the lower pocket was required to decrease survival from 100 to 5%. Other abiotic factors had weaker (gravel permeability) or non-existent (dissolved oxygen) correlations with survival.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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