Table 1.
Mean contact pressure (SD) in newtons (N) for all conditions in the lumbar, pelvic and thoracic area
| AREAS | CUSHION | |
|---|---|---|
| Lumbar | Non inflated | Inflated |
| No mattress | 11.92 N (4.95) | 174.19 N (25.24) |
| Foam (8 cm) | 26.76 N (5.85) | 41.62 N (8.64) |
| Matrress (14 cm) | 53.63 N (12.71) | 164.3 N (17.30) |
| Pelvic | ||
| No mattress | 448.86 N (31.56) | 388.48 N (30.95) |
| Foam (8 cm) | 79.71 N (11.72) | 71.71 N (10.11) |
| Mattress (14 cm) | 115.7 N (20.86) | 94.05 N (17.61) |
| Thoracic | ||
| No mattress | 106.92 N (35.58) | 60.8 N (26.11) |
| Foam (8 cm) | 43.81 N (10.52) | 43.33 N (10.02) |
| Mattress (14 cm) | 107.77 N (27.78) | 117.24 N (26.46) |