Both treatment outcome studies and meta-analyses document the efficacy of multiple cognitivebehavioral methods for treating PTSD. These reports have demonstrated that exposure-based therapies such as Prolonged Exposure (PE), Cognitive Processing Therapy (CPT), and Eye Movement Desensitization and Reprocessing (EMDR) consistently match or exceed their nonexposure counterparts in regard to efficacy. Yet the issue of attrition remains a significant concern for exposure-based therapies specifically. The present study compared the relationship between exposure therapies, exposure dose, trauma type, and attrition rates. A comprehensive literature search located 32 studies that met search criteria (i.e., random assignment to groups, use of a control group, manualized treatment, and clinician-generated PTSD diagnosis). The hypotheses were tested using chi-square analysis of independence. The results suggest that there are not significant differences in attrition based on treatment type, exposure dose, or trauma type. The discussion addresses the implications of these findings and recommends improvements in publication standards that would allow enhance the rigor of attrition analysis.
","abstract_html":"<p>Both treatment outcome studies and meta-analyses document the efficacy of multiple cognitivebehavioral methods for treating PTSD. These reports have demonstrated that exposure-based therapies such as Prolonged Exposure (PE), Cognitive Processing Therapy (CPT), and Eye Movement Desensitization and Reprocessing (EMDR) consistently match or exceed their nonexposure counterparts in regard to efficacy. Yet the issue of attrition remains a significant concern for exposure-based therapies specifically. The present study compared the relationship between exposure therapies, exposure dose, trauma type, and attrition rates. A comprehensive literature search located 32 studies that met search criteria (i.e., random assignment to groups, use of a control group, manualized treatment, and clinician-generated PTSD diagnosis). The hypotheses were tested using chi-square analysis of independence. The results suggest that there are not significant differences in attrition based on treatment type, exposure dose, or trauma type. The discussion addresses the implications of these findings and recommends improvements in publication standards that would allow enhance the rigor of attrition analysis.</p>","abstract_has_math":false,"creators":["Phillips, David R"],"institution":null,"degree_name":"Master of Science (MS)","degree_level":"Open Access Thesis","degree_discipline":"Psychology","degree_department":null,"school":null,"contributors":["Ellen Koch","Michelle Byrd","John Knapp"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2014,"date_issued":"2014-01-01T08:00:00Z","date_published":"2014-01-01T08:00:00Z","updated_at":"2026-07-24T02:17:27Z","subjects":["Attrition","Drop out","Exposure","Post-traumatic Stress Disorder","Prolonged Exposure","PTSD","Psychology","Social and Behavioral Sciences"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://commons.emich.edu/theses/860","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Ellen Koch","Michelle Byrd","John Knapp"]},{"key":"dc:creator","label":"Author","values":["Phillips, David R"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["2018-03-15T07:00:00Z"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Psychology"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Open Access Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science (MS)"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Attrition","Drop out","Exposure","Post-traumatic Stress Disorder","Prolonged Exposure","PTSD","Psychology","Social and Behavioral Sciences"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://commons.emich.edu/theses/860"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Both treatment outcome studies and meta-analyses document the efficacy of multiple cognitivebehavioral methods for treating PTSD. These reports have demonstrated that exposure-based therapies such as Prolonged Exposure (PE), Cognitive Processing Therapy (CPT), and Eye Movement Desensitization and Reprocessing (EMDR) consistently match or exceed their nonexposure counterparts in regard to efficacy. Yet the issue of attrition remains a significant concern for exposure-based therapies specifically. The present study compared the relationship between exposure therapies, exposure dose, trauma type, and attrition rates. A comprehensive literature search located 32 studies that met search criteria (i.e., random assignment to groups, use of a control group, manualized treatment, and clinician-generated PTSD diagnosis). The hypotheses were tested using chi-square analysis of independence. The results suggest that there are not significant differences in attrition based on treatment type, exposure dose, or trauma type. The discussion addresses the implications of these findings and recommends improvements in publication standards that would allow enhance the rigor of attrition analysis.
"]},{"key":"dc:title","label":"Title","values":["Exposure dose, trauma type, and attrition in PTSD efficacy studies"]}]}],"canonical_facts":{"dc:contributor":["Ellen Koch","Michelle Byrd","John Knapp"],"dc:creator":["Phillips, David R"],"dc:date.available":["2018-03-15T07:00:00Z"],"dc:description.abstract":["Both treatment outcome studies and meta-analyses document the efficacy of multiple cognitivebehavioral methods for treating PTSD. These reports have demonstrated that exposure-based therapies such as Prolonged Exposure (PE), Cognitive Processing Therapy (CPT), and Eye Movement Desensitization and Reprocessing (EMDR) consistently match or exceed their nonexposure counterparts in regard to efficacy. Yet the issue of attrition remains a significant concern for exposure-based therapies specifically. The present study compared the relationship between exposure therapies, exposure dose, trauma type, and attrition rates. A comprehensive literature search located 32 studies that met search criteria (i.e., random assignment to groups, use of a control group, manualized treatment, and clinician-generated PTSD diagnosis). The hypotheses were tested using chi-square analysis of independence. The results suggest that there are not significant differences in attrition based on treatment type, exposure dose, or trauma type. The discussion addresses the implications of these findings and recommends improvements in publication standards that would allow enhance the rigor of attrition analysis.
"],"dc:identifier":["https://commons.emich.edu/theses/860"],"dc:subject":["Attrition","Drop out","Exposure","Post-traumatic Stress Disorder","Prolonged Exposure","PTSD","Psychology","Social and Behavioral Sciences"],"dc:title":["Exposure dose, trauma type, and attrition in PTSD efficacy studies"],"thesis:degree_discipline":["Psychology"],"thesis:degree_level":["Open Access Thesis"],"thesis:degree_name":["Master of Science (MS)"]},"updated_at":"2026-07-24T02:17:27Z"}