Banasik 2011.
Methods | Randomised controlled trial | |
Participants | Women with diagnosed stage II‐IV breast cancer at least 2 months post treatment Recruited through a local cancer centre's database Mean age 62.9 years N = 18 |
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Interventions | • Iyengar yoga (yoga postures), 8 weeks, twice weekly for 90 minutes • Wait‐list, no treatment for 8 weeks |
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Outcomes | Health‐related quality of life (Functional Assessment of Cancer Therapy ‐ Breast Cancer) at week 8 Fatigue (new non‐validated instrument) at week 8 |
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Notes | Small sample size without a priori sample size calculation Large baseline differences between groups |
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Risk of bias | ||
Bias | Authors' judgement | Support for judgement |
Random sequence generation (selection bias) | Unclear risk | No information on random sequence generation ("[...] were randomly assigned [...]") |
Allocation concealment (selection bias) | Unclear risk | No information on allocation concealment |
Blinding of participants and personnel (performance bias) All outcomes | Unclear risk | No information on blinding |
Blinding of outcome assessment (detection bias) All outcomes | Unclear risk | No information on blinding |
Incomplete outcome data (attrition bias) All outcomes | Low risk | 22% dropout but well balanced across groups |
Selective reporting (reporting bias) | Low risk | No protocol available but no hint of selective reporting |
Other bias | High risk | Large baseline differences between groups |