Table 3 Effect of green tea polyphenols supplementation and Tai Chi exercise on quality of life in postmenopausal osteopenic women

Physical function

< 0.001

0.214

0.414

0.453

Baseline

77.7 ± 21.4

77.6 ± 21.7

78.4 ± 16.3

80.4 ± 19.1

12 week

72.9 ± 28.8

81.8 ± 21.2

80.9 ± 15.7

84.1 ± 15.6

24 week

65.9 ± 20.6

68.4 ± 20.4

68.1 ± 16.3

69.4 ± 16.4

Role-physical

0.136

0.477

0.578

0.466

Baseline

80.0 ± 34.7

78.4 ± 30.1

81.8 ± 33.2

84.6 ± 28.2

12 week

85.7 ± 28.6

83.8 ± 30.7

80.4 ± 36.4

86.8 ± 26.3

24 week

80.7 ± 31.6

89.2 ± 23.9

85.1 ± 28.5

89.7 ± 24.7

Bodily pain

0.703

0.679

0.947

0.791

Baseline

73.8 ± 19.2

73.2 ± 17.5

74.5 ± 17.3

76.6 ± 15.3

12 week

73.4 ± 19.3

74.2 ± 18.1

74.9 ± 16.5

76.2 ± 14.9

24 week

74.5 ± 18.4

73.9 ± 17.0

77.3 ± 16.4

76.1 ± 17.2

General health

0.168

0.676

0.917

0.114

Baseline

76.6 ± 16.5

72.9 ± 19.7

75.4 ± 16.2

76.4 ± 18.2

12 week

77.8 ± 13.6

75.1 ± 21.4

77.1 ± 16.4

77.3 ± 16.9

24 week

75.2 ± 16.0

76.0 ± 20.1

77.5 ± 16.2

76.5 ± 17.1

Vitality

0.064

0.305

0.576

0.160

Baseline

63.0 ± 20.7

58.0 ± 24.1

60.8 ± 23.0

64.7 ± 18.9

12 week

62.3 ± 22.4

59.5 ± 23.5

63.1 ± 21.7

67.9 ± 17.5

24 week

60.6 ± 19.7

64.2 ± 22.7

65.4 ± 22.7

68.7 ± 19.1

Social function

0.250

0.731

0.338

0.986

Baseline

89.3 ± 20.8

86.8 ± 20.2

85.1 ± 22.4

86.8 ± 16.6

12 week

88.6 ± 20.2

88.2 ± 20.8

87.5 ± 22.8

91.9 ± 14.7

24 week

85.7 ± 22.7

85.1 ± 22.4

86.1 ± 24.1

89.3 ± 18.2

Role-emotional

0.464

0.918

0.036

0.815

Baseline

87.6 ± 29.2

88.3 ± 25.1

77.5 ± 36.9

81.4 ± 30.9

12 week

89.5 ± 27.7

85.6 ± 31.0

81.1 ± 35.6

87.3 ± 30.7

24 week

85.7 ± 32.6

82.9 ± 33.0

88.3 ± 26.3

91.2 ± 20.6

Mental health

0.629

0.931

0.003

0.232

Baseline

80.2 ± 12.6

81.5 ± 11.5

77.4 ± 14.9

76.9 ± 15.7

12 week

80.8 ± 14.4

78.7 ± 14.3

78.3 ± 16.9

82.0 ± 10.8

24 week

78.6 ± 13.9

77.3 ± 17.1

81.3 ± 12.4

82.6 ± 10.0