{"doi":"10.1002/pon.70323","title":"Understanding the Effects of Cancer‐Related Factors on the Association Between Physical Activity, Self‐Efficacy and Exercise Barriers Among Breast Cancer Survivors","abstract":"BACKGROUND: Breast cancer can negatively impact survivors' physical activity (PA). Social cognitive theory (SCT) constructs may be correlated with PA, but it is unclear if cancer-related factors affect these relationships. AIMS: To examine associations between PA, self-efficacy, social support, and exercise barriers interference in breast cancer survivors and whether cancer-related factors moderate these relationships. METHODS: Baseline data from 341 post-primary treatment breast cancer survivors in a web-based diet/exercise intervention trial were analyzed. SCT constructs, accelerometry-measured and self-reported moderate-to-vigorous physical activity (MVPA), and cancer-related factors (stage, time since diagnosis, history of chemotherapy, history of radiation, and hormone therapy status) were examined using Pearson correlation analysis and multivariable linear regression analyses. RESULTS: Exercise barriers interference was inversely associated with self-reported (r = -0.272, p < 0.001); and accelerometry-measured MVPA (r = -0.128, p = 0.020). No other statistically significant associations were found. Stage and history of chemotherapy moderated the association between social support and self-reported MVPA. The association was stronger among survivors diagnosed with DCIS/stage I versus stage II/III (β = 4.14, p = 0.043, CI = -2.20-10.49) and weaker among individuals who previously received chemotherapy versus no chemotherapy history (β = -5.02, p = 0.026, CI = -11.51-1.47); effects were independent of one another. CONCLUSIONS: Cancer stage and previous chemotherapy moderate the association between social support and MVPA. Targeting social support in early-stage breast cancer survivors or survivors that did not receive chemotherapy may improve intervention effectiveness.","journal":"Psycho-Oncology","year":2025,"id":527461,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":3,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.9538,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2025-01-01","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":278737,"name":"Wendy Demark‐Wahnefried","orcid":"0000-0001-5241-932X","position":1,"is_corresponding":false},{"id":783706,"name":"Gregory Pavela","orcid":"0000-0001-5750-4021","position":2,"is_corresponding":false},{"id":71623,"name":"Kevin R. Fontaine","orcid":"0000-0002-2807-6440","position":3,"is_corresponding":false},{"id":574630,"name":"Nataliya V. Ivankova","orcid":"0000-0002-5742-7035","position":4,"is_corresponding":false},{"id":1404198,"name":"Maria Pisu","orcid":"0000-0001-9329-3268","position":5,"is_corresponding":false},{"id":443130,"name":"Michelle Y. Martin","orcid":"0000-0003-0954-3223","position":6,"is_corresponding":false},{"id":574634,"name":"Yu‐Mei Schoenberger","orcid":"0000-0002-7877-7819","position":7,"is_corresponding":false},{"id":337464,"name":"Robert A. Oster","orcid":"0000-0002-2247-8596","position":8,"is_corresponding":false},{"id":557785,"name":"Kelly Kenzik","orcid":"0000-0002-6402-8446","position":9,"is_corresponding":false},{"id":404085,"name":"Laura Q. Rogers","orcid":"0000-0003-4216-8381","position":10,"is_corresponding":false},{"id":785829,"name":"Erica Schleicher","orcid":"0000-0003-4051-0622","position":0,"is_corresponding":true}],"reference_count":23,"raw_metadata":null,"created_at":"2026-07-19T02:50:39.280101Z","pmid":"41204946","pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}