Document Detail

Healthy subjects volunteering for Phase I studies: influence of curiosity, exploratory tendencies and perceived self-efficacy.
MedLine Citation:
PMID:  18397681     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To test the hypothesis that trait-curiosity and perceived self-efficacy influence the willingness of healthy subjects to volunteer for participation in Phase I studies. MATERIALS AND METHODS: A group of healthy subjects who had never participated in clinical studies ("index group") were invited to participate in a Phase I study. They were assessed with regard to trait curiosity (Curiosity and Exploration Inventory; CEI-T) and perceived self-efficacy (Self-Efficacy Scale; SES) and subjects who accepted the invitation to participate were compared with those who refused and with a group of healthy subjects who had previously participated in clinical studies ("validation group"). RESULTS: A significant positive correlation was found between the willingness to participate and the CEI-T total score (R=0.28; p<0.01), exploratory tendencies (R=0.34; p<0.001), SES total score (R=0.30, p<0.01), initiative and persistence (R=0.29, p<0.01), planning/goal setting (R=0.19, p<0.05) and social self-efficacy (R=0.29; p<0.01). The "index group" subjects who accepted the invitation to participate showed significantly greater CEI-T exploratory tendencies (Z=-3.334, p = 0.001, Mann-Whitney test) and total scores (Z=-2.703, p<0.01) and greater SES total score (Z=-3.131, p<0.01), initiative and persistence (Z=-3.065, p<0.01), planning/goal setting (Z=-2.173, p<0.05) and social self-efficacy (Z=-2.954, p<0.01) than subjects who refused. No differences were found between the subjects in the "index group" who accepted the invitation and subjects in the "validation group". Using a logistic regression model, both CEI-T exploratory tendencies and SES initiative/persistence were significant predictors of participation. CONCLUSION: Subjects higher in curiosity/exploration and in perceived initiative/persistence are more willing to volunteer for Phase I studies. The impact of these self-selection biases on Phase I study results is unknown but deserves further evaluation.
L Almeida; T B Kashdan; R Coelho; A Albino-Teixeira; P Soares-da-Silva
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  International journal of clinical pharmacology and therapeutics     Volume:  46     ISSN:  0946-1965     ISO Abbreviation:  Int J Clin Pharmacol Ther     Publication Date:  2008 Mar 
Date Detail:
Created Date:  2008-04-09     Completed Date:  2008-06-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9423309     Medline TA:  Int J Clin Pharmacol Ther     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  109-18     Citation Subset:  IM    
Department of Research and Development, BIAL (Portela & Co., SA), S Mamede do Coronado, Portugal.
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MeSH Terms
Clinical Trials, Phase I as Topic / psychology*
Exploratory Behavior*
Middle Aged
Self Efficacy*
Socioeconomic Factors

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