Abstract
Shared decision making regarding immunosuppression in kidney transplantation requires an understanding of effects on quality of life (QoL). Our aim was to review the frequency and reliability of QoL measures reported in randomized controlled trials of maintenance immunosuppression following kidney transplantation. Systematic literature review. Kidney transplant recipients enrolled in randomized trials of maintenance immunosuppression. Systematic search of the Cochrane Kidney and Transplant register, CENTRAL, MEDLINE, EMBASE, PsycINFO, and CINAHL databases to January 2014 identifying maintenance immunosuppression trials. An EQUATOR Network-endorsed checklist was used to assess QoL reporting and effect sizes estimated. Maintenance immunosuppression (comparative studies, dose adjustment, and agent withdrawal). Any quantitative patient-reported measure of physical, emotional, or social well-being. Of 2,272 reports, 41 (2%; involving 4,549 participants from 23 trials) included QoL outcomes using 22 instruments (8 generic, 2 disease specific, and 12 symptom specific). Reporting was incomplete for the majority with 1 (4%) addressing all 11 items of the checklist, 4 (17%) addressing clinical significance, and 15 (65%) reporting outcomes selectively. Almost all (n = 96 [95%]) effect size estimates for 101 QoL outcomes (18 trials; 3,919 participants) favored the interventions, with 37 (37%) statistically significant. In comparison, 30 (73%) clinical outcomes favored the intervention and 13 (31%) were significant. QoL outcomes are commonly secondary outcomes and may not be indexed or found using text word searches. Effect sizes were estimated from different QoL measures, populations, and interventions. The small number of trials limits the ability to identify statistically significant associations between effect size and study-/patient-related factors. QoL is infrequently reported in immunosuppression trials in kidney transplantation, appears subject to major biases, and thus may be unreliable for decision making.
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