While rumination also showed a small effect (d =.224), the change did not reach statistical significance (p =.054), indicating only a trend toward improvement.
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Assessing impact of chamber restricted environmental stimulation therapy on stress and sleep quality among university students: an intervention study.
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0.0540
0.0540
The sentences
However, following the intervention, sleep quality did not improve significantly at the group level, and reductions in rumination only approached significance.