Journal
PSYCHIATRY RESEARCH
Volume 305, Issue -, Pages -Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.psychres.2021.114211
Keywords
Psychotic disorders; Attrition; Longitudinal studies
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The study found that individuals who did not participate were more likely to report an alcohol use disorder, while those who did participate were more likely to have received longer full-time education and be of white ethnicity in longitudinal studies.
A major problem with longitudinal studies is the bias generated due to attrition, particularly apparent amongst patients suffering from psychotic disorders. Factors associated with study-participation were investigated as part of a larger research collaboration (STRATA). Out of 479 eligible participants, only 50 (10,4%) were successfully followed up. The present study investigated whether study participation differed depending on baseline characteristics. Results indicated that individuals who did not participate were more likely to report an alcohol use disorder while those who did respond were more likely to have been in full-time education for longer and be of white ethnicity. Participation did not differ depending on diagnosis, symptoms, GAF, age of onset or depression.
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