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. Author manuscript; available in PMC: 2012 Oct 15.
Published in final edited form as: Accid Anal Prev. 2011 Mar 24;43(4):1480–1487. doi: 10.1016/j.aap.2011.02.028

Table 3.

F -ratios (p-value) from the repeated measures ANOVA and t-statistics (p-value) from paired t-tests (compared to the rigid condition) for the minimum margin of safety (MMOS) and displacement rate outcomes for centre-of-mass (COM) and centre-of-pressure (COP) profiles. Paired t-tests were not conducted if ANOVA revealed no significant effect of floor condition.

Parameter ANOVA Paired t-tests
SmartCell SofTile Firm-Foam Soft-Foam
Margin of safety
MMOSCOM 35.482 (<0.001) −1.543 (0.149) 2.340 (0.037) 3.783 (0.003)* 4.957 (<0.001)*
MMOSCOP 4.542 (0.006) −1.799 (0.097) 1.903 (0.081) 3.212 (0.007)* 1.146 (0.274)
Relative rates
COM0–20% 0.893 (0.409)
COM20–40% 8.014 (0.001) −1.359 (0.199) −0.43 (0.675) 3.001 (0.011)* 1.583 (0.139)
COM40–60% 5.748 (0.006) −1.429 (0.179) 0.301 (0.769) 2.700 (0.019)* 3.093 (0.009)*
COM60–80% 7.508 (<0.001) 0.765 (0.459) −0.014 (0.989) 7.031 (<0.001)* 2.789 (0.016)*
COM80–100% 2.5 (0.102)
COP0–20% 17.049 (<0.001) −2.422 (0.032)** −6.004 (<0.001)** −1.311 (0.214) −10.238 (<0.001)**
COP20–40% 3.822 (0.009) −0.043 (0.966) −0.633 (0.539) 2.510 (0.027)* 0.076 (0.941)
COP40–60% 38.164 (<0.001) 0.809 (0.434) 3.522 (0.004)* 8.036 (<0.001)* 6.009 (<0.001)*
COP60–80% 8.048 (0.003) 0.477 (0.642) 6.332 (<0.001)* 4.978 (<0.001)* 2.636 (0.022)*
COP80–100% 2.556 (0.095)
Absolute rates
COM0–2 cm 0.945 (0.409)
COM2–4 cm 11.280 (<0.001) 1.611 (0.133) −2.272 (0.042)** 3.387 (0.005)* 4.659 (0.001)*
COP0–2 cm 21.908 (<0.001) −1.952 (0.075) −6.203 (<0.001)** −2.673 (0.020)** −7.282 (<0.001)**
COP2–4 cm 5.014 (0.01) −0.601 (0.559) −1.713 (0.112) 2.415 (0.033)* −1.633 (0.128)
COP4–6 cm 38.920 (<0.001) 0.592 (0.565) 2.803 (0.016)* 9.102 (<0.001)* 5.643 (<0.001)*
COP6–8 cm 30.193 (<0.001) −0.315 (0.758) 1.036 (0.321) 5.297 (<0.001)* 5.669 (<0.001)*
*

Significantly lower than control condition (p < 0.0125).

**

Significantly greater than control condition (p < 0.0125).