Table 3.
Mean interface pressure and contact area at baseline before the start of resuscitation.
| Flat hard floor | A higher specification foam mattress (HSFM) | Carital® Optima |
Nimbus® 3 comfort control soft in static mode | Nimbus® 3 comfort control soft in alternating mode | Nimbus® 3 comfort control hard in static mode | Nimbus® 3 comfort control hard in alternating mode | ||
|---|---|---|---|---|---|---|---|---|
| Group | 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
| Mean interface pressure, mmHg (SD) | A | 75.1 (2.2) |
45.1 (4.3) |
44.7 (3.7) |
47.6 (6.8) |
43.7 (4.0) |
59.2 (7.3) |
51.5 (7.0) |
| Contact area, cm2 (SD) | B | 678 (62) |
1109 (449) |
1286 (350) |
1251 (251) |
1149 (203) |
1237 (188) |
1094 (205) |
| N* | 18 | 18 | 18 | 18 | 18 | 18 | 18 | |
| p-value (CI 95%) |
A | <0.0001 (−33.6,−27.3) |
0.7641 (−3.6,2.7) |
– – |
0.0651 (−6.1,0.2) |
0.5492 (−2.2,4.1) |
<0.0001 (−17.6,−11.4) |
0.0001 (−10.0,−3.7) |
| p-value (CI 95%) |
B | <0.0001 (457,759 |
0.0231 (26,329) |
– – |
0.6363 (−116,187) |
0.0752 (−15,288) |
0.5110 (−102,201) |
0.0148 (40,343) |
The comparisons are presented in the statistical table (above).
The mean interface pressure values were the highest on hard flat floor and Nimbus® 3 comfort control hard in static mode. The estimated difference to Carital® Optima was 30.5 and 14.5 mmHg (points A1 and A6) respectively.
The contact area was correspondingly lowest on hard flat floor. The mean difference to Carital® Optima was 608 cm2 (Point B1).
*
N is based on the repeated measurements as described in the materials and methods section.