title: Predictors of dyadic planning: Perspectives of prostate cancer survivors and their partners.
abstract: OBJECTIVE
  Extending individual planning of health behaviour change to the level of the dyad, dyadic planning refers to a target person and a planning partner jointly planning the target person's health behaviour change. To date, predictors of dyadic planning have not been systematically investigated. Integrating cognitive predictors of individual planning with four established predictor domains of social support provision, we propose a framework of predictors of dyadic planning. Including target persons' and partners' perspectives, we examine these predictor domains in the context of prostate cancer patients' rehabilitative pelvic floor exercise (PFE) following radical prostatectomy.
  
  
  METHODS
  Longitudinal data from 175 patients and their partners were analysed in a study with four post-surgery assessments across 6 months.
  
  
  METHODS
  PFE-related dyadic planning was assessed from both partners together with indicators from four predictor domains: context, target person, partner, and relationship factors. Individual planning and social support served as covariates.
  
  
  RESULTS
  Findings from two-level models nesting repeated assessments in individuals showed that context (patients' incontinence), target person (i.e., positive affect and self-efficacy), and relationship factors (i.e., relationship satisfaction) were uniquely associated with dyadic planning, whereas partner factors (i.e., positive and negative affects) were not. Factors predicting patients' and partners' accounts of dyadic planning differed.
  
  
  CONCLUSIONS
  Resembling prior findings on antecedents of support provision in this context, partner factors did not prevail as unique predictors of dyadic planning, whereas indicators from all other predictor domains did. To establish predictive direction, future work should use lagged predictions with shorter intermeasurement intervals. Statement of contribution What is already known on this subject? Dyadic planning has been shown to be linked to health behaviour change. However, its role in behaviour regulation frameworks is not well investigated, especially regarding factors that might be predictive of dyadic planning. What does this study add? A framework of predictors of dyadic planning in the health behaviour change process is presented. The framework is investigated accounting for both planning partners' perspectives. Context, target person, and relationship factors were related to dyadic planning.
authors.affiliation: Department of Educational Science and Psychology, Division Health Psychology, Freie Universität Berlin, Germany.
authors.forename: Jan
authors.identifier: http://orcid.org/0000-0003-4660-6844
authors.initials: J
authors.lastname: Keller
authors.affiliation: Department of Educational Science and Psychology, Division Health Psychology, Freie Universität Berlin, Germany.
authors.forename: Amelie U
authors.initials: AU
authors.lastname: Wiedemann
authors.affiliation: Department of Educational Science and Psychology, Division Health Psychology, Freie Universität Berlin, Germany.
authors.forename: Diana Hilda
authors.initials: DH
authors.lastname: Hohl
authors.affiliation: Department of Psychology, University of Zurich, Switzerland.
authors.forename: Urte
authors.initials: U
authors.lastname: Scholz
authors.affiliation: Institute of Medical Psychology, Charité - Universitätsmedizin Berlin, Germany.
authors.forename: Silke
authors.initials: S
authors.lastname: Burkert
authors.affiliation: Department of Urology, HELIOS Klinikum Berlin-Buch, Germany.
authors.forename: Mark
authors.initials: M
authors.lastname: Schrader
authors.affiliation: Department of Educational Science and Psychology, Division Health Psychology, Freie Universität Berlin, Germany.
authors.forename: Nina
authors.initials: N
authors.lastname: Knoll
mesh_terms: D000328:Adult; D000368:Aged; D003071:Cognition; D003299:Cooperative Behavior; D005260:Female; D015438:Health Behavior; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D017773:Pelvic Floor; D026741:Physical Therapy Modalities; D011183:Postoperative Complications / Q000534:rehabilitation*; D011468:Prostatectomy / Q000534:rehabilitation*; D011471:Prostatic Neoplasms / Q000601:surgery*; D020377:Self Efficacy; D012944:Social Support; D018454:Spouses; D017741:Survivors; D014549:Urinary Incontinence / Q000534:rehabilitation*
keywords: dyadic planning; individual planning; predictors; prostate cancer