Table 3 ANCOVA results comparing the mean average of posttest measures by eliminating possible effects of pretest measures of quality of life, chest expansion, and physical ability for the experimental group (n = 20) and control group (n = 20)

QOL (pretest)

66.14 ± 11.64

61.61 ± 9.51

29.08

 < 0.001^*

0.44

QOL (posttest)

67.12 ± 11.61

61.40 ± 8.97

Chest expansion (pretest)

2.53 ± 0.86

2.94 ± 0.80

47.61

 < 0.001^*

0.56

Chest expansion (posttest)

3.43 ± 0.70

2.74 ± 0.67

Physical ability (pretest)

71.19 ± 11.21

72.68 ± 9.50

1.36

0.251

0.04

Physical ability (posttest)

70.62 ± 10.46

72.71 ± 9.43