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From:
Accid Anal Prev. Author manuscript; available in PMC Oct 15, 2012.
Published in final edited form as:
Accid Anal Prev. Jul 2011; 43(4): 1480–1487.
Published online Mar 24, 2011. 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.
ParameterANOVAPaired t-tests
SmartCellSofTileFirm-FoamSoft-Foam
Margin of safety
MMOSCOM35.482 (<0.001)−1.543 (0.149)2.340 (0.037)3.783 (0.003)*4.957 (<0.001)*
MMOSCOP4.542 (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 cm0.945 (0.409)
COM2–4 cm11.280 (<0.001)1.611 (0.133)−2.272 (0.042)**3.387 (0.005)*4.659 (0.001)*
COP0–2 cm21.908 (<0.001)−1.952 (0.075)−6.203 (<0.001)**−2.673 (0.020)**−7.282 (<0.001)**
COP2–4 cm5.014 (0.01)−0.601 (0.559)−1.713 (0.112)2.415 (0.033)*−1.633 (0.128)
COP4–6 cm38.920 (<0.001)0.592 (0.565)2.803 (0.016)*9.102 (<0.001)*5.643 (<0.001)*
COP6–8 cm30.193 (<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).