Table 8 Contraction ratio of TrA, IO, and EO at the end of expiration during deep expiration at different angles (%)

X ± SD

P1

Cohen’d 1

P2

Cohen’d 2

X ± SD

P1

Cohen’d 1

P2

Cohen’d 2

X ± SD

P1

Cohen’d 1

P2

Cohen’d 2

Left

TrA

156.46 ± 42.91

<0.001

3.22

<0.001

1.39

126.28 ± 33.63

0.03

0.50

<0.001

1.20

146.43 ± 57.30

0.12

0.35

<0.001

0.99

IO

108.91 ± 23.11

-

-

0.23

0.26

155.86 ± 43.26

-

-

<0.001

0.77

124.51 ± 27.78

-

-

0.01

0.64

EO

99.50 ± 16.48

0.23

0.26

-

-

103.07 ± 16.62^a

<0.001

0.77

-

-

99.90 ± 16.54^a

0.01

0.64

-

-

Right

TrA

164.54 ± 42.15

0.55

-0.13

0.01

1.74

148.00 ± 44.43

0.14

0.33

<0.001

1.17

156.67 ± 53.11

0.31

0.22

<0.001

0.99

IO

173.94 ± 51.31

-

-

<0.001

1.49

162.24 ± 44.10

-

-

<0.001

0.95

144.13 ± 48.35

-

-

<0.001

1.01

EO

96.84 ± 12.18^a

<0.001

1.49

-

-

97.61 ± 17.56^a

<0.001

0.95

-

-

95.81 ± 14.89^a

<0.001

1.01

-

-