Table 1

Characteristics of study participants at baseline randomized to both the usual care control group and the Tai Chi intervention.

Variable

Randomized to Usual Care

(n = 43)

Randomized to

Tai Chi

(n = 43)

Per Protocol

Tai Chi

(n = 26)


Age in years (mean ± SD (range))

60.4 ± 5.3 (46-70)

58.8 ± 5.6 (43-70)

59.1 ± 4.9 (51-68)

Race: n (%)

White

36 (84)

37 (86)

21 (88)

African American

2 (5)

4 (9)

2 (8)

Asian

3 (7)

1 (2)

0 (0)

Other

2 (5)

1 (2)

1 (4)

Education: n(%)

High School/GED

4 (9)

1 (2)

0

Some College

5 (12)

3 (7)

1 (4)

College

13 (30)

15 (35)

8 (33)

Graduate degree

21 (49)

24 (56)

15 (63)

BMI in kg/m2 (mean ± SD)

24.5 ± 4.0

25.8 ± 4.2

25.8 ± 3.8

Years post-menopause, n (%)

1-7

18 (42)

24 (56)

12 (50)

> 7

18 (42)

12 (28)

7 (29)

unknown

7 (16)

7 (16)

5 (21)

Calcium supplementation, n (%)

Yes

34 (79)

34 (79)

19 (79)

No

8 (19)

7 (16)

3 (13)

unknown

1 (2)

2 (5)

2 (8)

BMD in g/cm2 (mean ± SD):

Femoral neck

0.692 ± 0.068

0.680 ± 0.063

0.685 ± 0.074

Total hip

0.837 ± 0.077

0.829 ± 0.073

0.832 ± 0.079

Spine

0.901 ± 0.128

0.898 ± 0.070

0.898 ± 0.076

Serum bone turnover markers (mean ± SD)

CTX ng/ml

0.603 ± 0.231

0.554 ± 0.259

0.594 ± 0.300

OSC ng/ml

15.52 ± 4.94

16.29 ± 6.01

17.11 ± 7.02

Physical activity (PAR, kcal/kg/d) (mean ± SD)

144.5 ± 43.6

128.0 ± 38.4

123.9 ± 26.9

SF-36 (mean ± SD):

Physical

53.2 + 5.6

53.5 + 6.1

51.9 + 6.8

Mental

55.8 + 4.8

52.0 + 7.7

53.7 + 7.0

Expectancy (mean ± SD)*:

Q.1: 'Improving your health'

3.79 + 0.80

3.88 + 1.12

3.92 + 1.38

Q.2: 'Recommend to a friend'

3.67 + 1.13

3.60 + 1.69

3.67 + 1.74

Q.3: 'Makes sense to you'

4.09 + 0.97

4.19 + 1.10

4.21 + 1.32


* Expectancy values based on 5 point Likert scale; higher values indicate greater expectancy that Tai Chi will positively impact health

Also shown are data for the subset of participants randomized to Tai Chi whose compliance placed them in the "per protocol" group (i.e. ≥ 75% compliant with class and home practice). All continuous variables are means ± standard deviation. Categorical variable are described with frequency count followed by percentages..

Wayne et al. BMC Complementary and Alternative Medicine 2012 12:7   doi:10.1186/1472-6882-12-7

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