Article

Tai Chi Is Effective in Treating Knee Osteoarthritis: A Randomized Controlled Trial

Division of Rheumatology, Tufts Medical Center, Box 406, Tufts University School of Medicine, Boston, MA 02111, USA.
Arthritis & Rheumatology (Impact Factor: 7.87). 09/2008; 61(11):1545-53. DOI: 10.1002/art.24832
Source: PubMed

ABSTRACT To evaluate the effectiveness of Tai Chi in the treatment of knee osteoarthritis (OA) symptoms.
We conducted a prospective, single-blind, randomized controlled trial of 40 individuals with symptomatic tibiofemoral OA. Patients were randomly assigned to 60 minutes of Tai Chi (10 modified forms from classic Yang style) or attention control (wellness education and stretching) twice weekly for 12 weeks. The primary outcome was the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) pain score at 12 weeks. Secondary outcomes included WOMAC function, patient and physician global assessments, timed chair stand, depression index, self-efficacy scale, and quality of life. We repeated these assessments at 24 and 48 weeks. Analyses were compared by intent-to-treat principles.
The 40 patients had a mean age of 65 years and a mean body mass index of 30.0 kg/m(2). Compared with the controls, patients assigned to Tai Chi exhibited significantly greater improvement in WOMAC pain (mean difference at 12 weeks -118.80 mm [95% confidence interval (95% CI) -183.66, -53.94; P = 0.0005]), WOMAC physical function (-324.60 mm [95% CI -513.98, -135.22; P = 0.001]), patient global visual analog scale (VAS; -2.15 cm [95% CI -3.82, -0.49; P = 0.01]), physician global VAS (-1.71 cm [95% CI -2.75, -0.66; P = 0.002]), chair stand time (-10.88 seconds [95% CI -15.91, -5.84; P = 0.00005]), Center for Epidemiologic Studies Depression Scale (-6.70 [95% CI -11.63, -1.77; P = 0.009]), self-efficacy score (0.71 [95% CI 0.03, 1.39; P = 0.04]), and Short Form 36 physical component summary (7.43 [95% CI 2.50, 12.36; P = 0.004]). No severe adverse events were observed.
Tai Chi reduces pain and improves physical function, self-efficacy, depression, and health-related quality of life for knee OA.

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    • "The concept of confidence in one's coping abilities can be related to a specific domain (specific self-efficacy) as well as more generally to a variety of stressful situations (general self-efficacy – GSE) [31]. Positive effects of Taiji on domain-specific selfefficacy have been repeatedly observed, namely on self-efficacy related to exercise behavior [19,32–35], pain management [36], physical capability [37] and fall prevention [34] [38]. A significant increase in GSE following Taiji has been reported in three randomized controlled trials [39] [40] [41]. "
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    • "two studies enrolled sedentary older adults, 14,15 whereas the other studies had participants with similar health conditions, such as osteoarthritis (OA). 13,17 For the sake of clarity and legibility, we use study 1, study 2, study 3 and study 4 to refer to Fransen et al., 2007; Frye et al., 2007; Li et al., 2001; and Wang et al., 2009, respectively. "
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