A sleep trial leaves room for an honest comparison
Tai chi/qigong did not significantly outperform matched exercise or usual care on overall sleep quality in a trial of older male cancer survivors.
A Brain Medicine trial, highlighted in a November 6 research release, compared tai chi/qigong, intensity-matched exercise and usual care in 113 male cancer survivors aged 55 and older. The paper was published online September 8.
The comparison matters more than the trend
Both classes met twice weekly for twelve weeks. At three months after the program, the groups did not differ significantly in overall sleep quality. The matched exercise group showed some improvements from its own baseline; the tai chi/qigong group’s corresponding trends were not statistically significant.
Those are different comparisons. Improvement within one group does not establish that it performed better than another. A higher proportion meeting a sleep-questionnaire threshold at twelve months also did not produce a statistically significant difference between groups.
Sleep was self-reported, and most participants had prostate cancer. The findings do not establish a clinical sleep treatment or show that one practice is superior. For teachers, this is a useful reminder to keep the comparison, uncertainty and population attached to a promising headline.
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