Item

I. Without cushion

non-intervention

II. F cushion

intervention

III. A cushion

intervention

IV. Self-made cushion

intervention

ANOVA

Comfortability:

VAS-H (point) n = 10

3.4 ± 1.3

7.4 ± 0.4

8.7 ± 0.4

9.2 ± 0.6

I < II*,

I < III*,

I < IV*

Pelvic tilt angle (degrees):

Difference from 90 degrees

n = 10

23.1 ± 4.4

16.9 ± 2.4

13.6 ± 2.7

13.4 ± 2.3

I < II*,

I < III*,

I < IV*

Sitting position:

Distance from seat tip

(cm) n = 10

11.8 ± 3.3

17.1 ± 1.5

18.0 ± 2.8

18.14 ± 2.7

I < II*,

I < III*,

I < IV*