Is Tai Chi plus behaviorally based dietary weight loss effective in improving physical functioning among obese women?
Date of publication of the non-randomized controlled trial: January 2015
Design
Non-randomized controlled trial.
Participants
54 obese older women aged 60 years or older (mean age: 68.2 years in treatment group, 65.6 years in control group).
Intervention
A behaviorally based modified DASH diet was provided, along with a modified 24 form Yang style Tai Chi. The Tai Chi program consisted of two 45-minute exercise sessions per week on nonconsecutive days and one 45-minute weekly nutrition education session for 16 weeks.
Comparator
Comparison: Tai Chi plus a behavioral weight loss program (TCWL) versus wait-list controls which maintained normal lifestyle.
Major Outcomes
Outcome 1: Physical function as measured by short physical performance battery test (SPPB) at post-intervention. Higher scores indicated better physical function;
Outcome 2: Physical function as measured by eight-foot up and go (UG) at post-intervention (s). Higher scores indicated better physical function.
Settings
This trial was conducted in a community setting.
Comparison    TCWL versus wait-list controls
Main Results
Compared to wait-list controls, TCWL showed significant improvement in physical function as measured by SPPB (β: 1.94, 95% CI: 1.12 to 2.76). However, TCWL did not show improvement in physical function as measured by UG (β: 1.24, 95% CI: 0.32 to 2.16).
Comparison: TCWL versus wait-list controls among obese women at post-intervention
Outcomes (unit) No. of studies (Total no. of participants) Mean value(SD) / No. of participants Heterogeneity test (I2) β (95% CI) p value Overall quality of evidence*
Intervention Comparator
1 (NA) 1 (38) Not reported / 29 Not reported/ 9 Not applicable as there is only 1 study. 1.94 (1.12 to 2.76) <0.001 Moderate
2 (s) 1 (38) Not reported / 29 Not reported/ 9 Not applicable as there is only 1 study. 1.24 (0.32 to 2.16) 0.009 Moderate
Keys: ß = beta coefficient; SD = standard deviation; CI = confidence interval.
Comparison    TCWL versus wait-list controls
Main Results
Compared to wait-list controls, TCWL showed significant improvement in physical function as measured by SPPB (β: 1.94, 95% CI: 1.12 to 2.76). However, TCWL did not show improvement in physical function as measured by UG (β: 1.24, 95% CI: 0.32 to 2.16).
Comparison: TCWL versus wait-list controls among obese women at post-intervention
Outcomes (unit) 1 (NA) 2 (s)
No. of studies (Total no. of participants) 1 (38) 1 (38)
Mean value(SD) / No. of participants Intervention Not reported / 29 Not reported / 29
Comparator Not reported/ 9 Not reported/ 9
β (95% CI) 1.94 (1.12 to 2.76) 1.24 (0.32 to 2.16)
p value <0.001 0.009
Overall quality of evidence* Moderate Moderate
Keys: ß = beta coefficient; SD = standard deviation; CI = confidence interval.
Conclusion
Benefits
Compared to wait-list controls, TCWL showed significant improvement in physical function as measured by SPPB. However, TCWL did not show improvement in physical function as measured by UG. For all outcomes, the overall quality of evidence is moderate. Further research is fairly likely to have an important impact on our confidence in this estimate of effect.
Harms
Adverse event was not reported in this study.
Link to Original Article
http://www.ncbi.nlm.nih.gov/pubmed/25803604
The synopsis is based on the following article:
Xu F, Letendre J, Bekke J, Beebe N, Mahler L, Lofgren IE, et al. Impact of a program of Tai Chi plus behaviorally based dietary weight loss on physical functioning and coronary heart disease risk factors: a community-based study in obese older women. Journal of Nutrition in Gerontology & Geriatrics. 2015;34(1):50-65.


* Interpretation of quality assessment results:
• Very low: Further research is most likely to have an important impact on our confidence in this estimate of effect.
• Low: Further research is likely to have an important impact on our confidence in this estimate of effect.
• Moderate: Further research is fairly likely to have an important impact on our confidence in this estimate of effect.
• High: Further research is unlikely to have an important impact on our confidence in this estimate of effect.
• Very high: Further research is most unlikely to have an important impact on our confidence in this estimate of effect.

Details of assessment method can be found at Chung VC, Wu XY, Ziea ET, Ng BF, Wong SY, Wu JC. Assessing internal validity of clinical evidence on effectiveness of CHinese and integrative medicine: Proposed framework for a CHinese and Integrative Medicine Evidence RAting System (CHIMERAS). European Journal of Integrative Medicine. 2015 Aug 31;7(4):332-41.