Methods |
Study design: parallel RCT; 388 assessed for eligibility, 63 randomised
Study duration: January 2010 to March 2012
Study follow‐up: 6 months
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Participants |
Country: USA
Setting: community
kidney transplant recipients aged ≥ 18 years
Number (randomised/analysed at 2 months/analysed at 6 months): intervention group 1 (31/24/20); intervention group 2 (232/27/22)
Mean age ± SD (years): intervention group 1 (52.6 ± 12.6); intervention group 2 (54.6 ± 11.7)
Sex (M/F): intervention group 1 (8/19); intervention group 2 (16/12)
Exclusion criteria: prior transplant, prior mindfulness‐based stress reduction or regular meditation practice; serious mental health concerns (suicidality, psychotic disorder, or substance abuse identified on screening by a psychologist); hospitalised or medically unstable (e.g. recent stroke); kidney transplant scheduled within the next 3 months
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Interventions |
Intervention group 1
Intervention group 2
Telephone‐adapted support group
To provide attention from a facilitator, group support and structured study activities to balance treatment arms with respect to known non‐specific effects of MBSR.
Provide content driven and highly structured intervention with an attentive instructor to elicit positive group experience and prevent lengthy or pervasively negative discussions of problems interpersonal communication skills and how to select health resources were selected as generic skills that would not overlap with MBSR
Skill building with homework assignments included Homework assignments designed by leader in weeks 1,6,7 but individual action commitments for other weeks.
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Outcomes |
Primary outcome (measured at baseline, 2 months, 6 months)
Secondary outcomes (measured at baseline, 2 months, 6 months)
depression (centre for epidemiological studies ‐ depression)
Insomnia (Pittsburgh Sleep Quality Index)
HRQoL (measured using SF‐12: mental and physical component scores, pain interference item)
Mindfulness (mindful attention awareness scale)
Worry (Penn‐state worry questionnaire)
Perceived stress (perceived stress scale PSS‐14)
Fatigue PROMIS fatigue short form
2 subscales from KDQoL (impact and burden)
Actigraphy (sleep quantity and quality ‐ objective measure)
Salivary cortisol (objective biomarker or stress)
Other outcome (measured at 2 months)
Feasibility and acceptability (Intervention attendance: roll call and recorded weekly rosters, conference call records provided by teleconference vendor; treatment preference and expectations of intervention usefulness assessed on health and attitudes questionnaires; treatment fidelity measured by tallies of prescribed course elements on intervention checklists with weekly calls and occasional live monitoring by health psychologist)
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Notes |
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Risk of bias |
Bias |
Authors' judgement |
Support for judgement |
Random sequence generation (selection bias) |
Low risk |
Computer generated using permuted blocks |
Allocation concealment (selection bias) |
Low risk |
conducted by statistician who was masked. participants completed baseline assessments prior to randomisation |
Blinding of participants and personnel (performance bias)
Blinding of participants |
High risk |
Quote: "single blind" |
Blinding of participants and personnel (performance bias)
Blinding of personnel |
High risk |
Unlikely could have been blinded / blinding would have been broken |
Blinding of outcome assessment (detection bias)
Objective outcome |
Low risk |
Objective measures (salivary cortisol and sleep actigraphy) |
Blinding of outcome assessment (detection bias)
Subjective outcomes |
High risk |
Feasibility and acceptability measures taken with staff, QoL and anxiety measures are patient reported |
Incomplete outcome data (attrition bias)
All outcomes |
Low risk |
Low loss to follow‐up (12.5% to 12.9%) |
Selective reporting (reporting bias) |
High risk |
Salivary cortisol and sleep actigraphy and a number of emotional state outcomes were not reported in either paper |
Other bias |
Unclear risk |
Insufficient information to permit judgement |