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Background: Recruitment to paediatric palliative care research is challenging, with high rates of non-invitation of eligible families by clinicians. The impact on sample characteristics is unknown. Aim: To investigate, using mixed methods, non-invitation of eligible families and ensuing selection bias in an interview study about parents experiences of advance care planning (ACP). Design: We examined differences between eligible families invited and not invited to participate by clinicians using (1) field notes of discussions with clinicians during the invitation phase and (2) anonymised information from the services clinical database. Setting: Families were eligible for the ACP study if their child was receiving care from a UK-based tertiary palliative care service (Group A; N = 519) or had died 610 months previously having received care from the service (Group B; N = 73). Results: Rates of non-invitation to the ACP study were high. A total of 28 (5.4%) Group A families and 21 (28.8%) Group B families (ρ < 0.0005) were invited. Familyclinician relationship appeared to be a key factor associated qualitatively with invitation in both groups. In Group A, out-of-hours contact with family was statistically associated with invitation (adjusted odds ratio 5.46 (95% confidence interval 2.1314.00); ρ < 0.0005). Qualitative findings also indicated that clinicians perceptions of families wellbeing, circumstances, characteristics, engagement with clinicians and anticipated reaction to invitation influenced invitation. Conclusion: We found evidence of selective invitation practices that could bias research findings. Non-invitation and selection bias should be considered, assessed and reported in palliative care studies.

Original publication

DOI

10.1177/0269216314560803

Type

Journal article

Journal

Palliative Medicine

Publication Date

01/01/2015

Volume

29

Pages

231 - 240