Relationship between perceived social support and patient-reported communication outcomes across communication disorders: a systematic review.

BACKGROUND: Beyond the severity of voice, speech and language impairments, one potential predictor of communication success across adult populations with communication disorders may be perceived social support: the expectation that others will provide support if needed. Despite the preponderance of intervention approaches that assume a positive relationship between perceived social support and patient-reported communication success, the evidence base for these relationships is limited. AIMS: The aim of this systematic review is to explore relationships between measures of perceived social support and patient-reported communication outcomes in adult populations with communication disorders. METHODS & PROCEDURES: The PRISMA guidelines were followed in the conduct and reporting of this review. Electronic databases including PubMed, PsychINFO and CINAHL were systematically searched up to 19 May 2017. Additional data were obtained for two studies. All the included studies were appraised using the Critical Appraisal Skills Program (CASP) tools. Given the heterogeneous nature of the studies, data synthesis was narrative for the quantitative studies. A meta-ethnographic approach was used to synthesize qualitative data. OUTCOMES &
RESULTS: Eight quantitative and four qualitative studies met eligibility criteria. All quantitative studies met eight of eight quality criteria. For the qualitative studies, one study met nine of nine quality criteria; the remaining three studies met three, seven and eight quality criteria. Of the eight included quantitative studies, six independent data sets were used. Results revealed no significant relationships between perceived social support and communication outcomes in three studies (two aphasia with one data set, one Parkinson's disease), while perceived social support was a weak, but significant predictor in two studies (one multiple sclerosis, one head and neck cancer). Three additional studies (two aphasia with one data set; one Parkinson's disease) found that relationships were initially weak, but strengthened over time to become moderate. Results from qualitative studies (one head and neck cancer, two aphasia, one multiple sclerosis) revealed that perceived social support acted as a facilitator, and absent or misguided support acted as a barrier to communication outcomes. Skilful, responsive family members were able to facilitate better quality of communicative interactions, whereas lack of social support, or negative attitudes and behaviours of other people, were barriers. CONCLUSIONS & IMPLICATIONS: While perceived social support may affect communication outcomes in adults with communication disorders, current measures may not adequately capture these constructs. Results have implications for future research and interventions for speech and language therapists.