The effects of mobile phone use on walking: a dual task study

BMC Research Notes

Table 1 Multivariate and univariate results of a RMANOVA on the reported spatiotemporal stride parameters

Multivariate		Mean values		Coefficient of variation values
Multivariate	Task	Speed	Speed × task	Task	Speed	Speed × task^a
	Λ = 0.144 F_8,30 = 6.1 P < 0.001	Λ = 0.087 F_4,6 = 15.7 P = 0.002	Λ = 0.277 F_8,30 = 3.4 P = 0.007	Λ = 0.011 F_8,30 = 32.5 P < 0.001	Λ = 0.019 F_4,6 = 76.7 P < 0.001	Λ = 0.012 F_8,30 = 30.8 P < 0.001

Univariate	Task	Speed	Speed × task	Task	Speed	Speed × task^a
Gait velocity	F_2,18 = 23.9 P < 0.001	F_1,9 = 71.5 P < 0.001	F_2,18 = 0.8 P = 0.484	F_2,18 = 2.5 P = 0.115	F_1,9 = 122.8 P < 0.001	F_2,18 = 65.2 P < 0.001
Cadence	F_1,18 = 7.0 P = 0.006	F_1,9 = 68.9 P < 0.001	F_2,18 = 0.4 P = 0.668	F_1.1,9.9 = 7.0 P = 0.023	F_1,9 = 2.2 P = 0.170	F_2,18 = 0.09 P = 0.914
Stride length	F_2,18 = 38.8 P = 0.000	F_1,9 = 62.6 P < 0.001	F_2,18 = 1.0 P = 0.386	F_1.2,10.9 = 19.9 P = 0.001	F_1,9 = 68.3 P < 0.001	F_2,18 = 29.9 P < 0.001
Double support time	F_2,18 = 8.1 P = 0.009	F_1,9 = 26.3 P < 0.001	F_1.2,10.7 = 0.3 P = 0.638	F_2,18 = 5.2 P = 0.016	F_1,9 = 12.3 P = 0.007	F_2,18 = 12.9 P < 0.001

Italic values represent significant findings
Λ = Wilk’s Lambda
^aSignificant values of this interaction effect are likely introduced by the log transformation of non-normally distributed variables

ISSN: 1756-0500