Table 5.

Mixed model results of age, gender, BMI and leg length on stability and the domains of gait derived from the factor analysis. AP MoS, margin of stability in the anterior–posterior direction; ML MoS, margin of stability in the medio-lateral direction; mm, millimetres; age, years; gender, the performance of females (0) when compared with males (1); leg length = mm; *p < 0.05; **p < 0.001; ^$p < 0.0001; $Y_i=\hspace{0.17em}{\beta }_0+{\beta }_1\hspace{0.17em}\ast \hspace{0.17em}\text{age}+{\beta }_2\hspace{0.17em}\ast \hspace{0.17em}\text{gender}\hspace{0.17em}(0)\hspace{0.17em}+{\beta }_3\hspace{0.17em}\ast \hspace{0.17em}\text{BMI}+{\beta }_4\hspace{0.17em}\ast \hspace{0.17em}\text{leg length}$. Statistically significant values in the last column are indicated by italic.

parameter	β0	β1–4	95% CI	p-value
AP MoS (mm)	330.25		[−266.92 ; 927.42]	0.275
age		−0.69	[−2.14 ; 0.77]	0.350
gender (0)		−14.52	[−87.09 ; 58.05]	0.692
BMI		−3.04	[−9.07 ; 3.00]	0.320
leg length		0.10	[−0.48 ; 0.67]	0.741
ML MoS (mm)	18.08		[−21.72 ; 57.87]	0.370
age*		−0.15	[−0.25 ; −0.05]	0.003
gender (0)		−4.55	[−9.38 ; 0.29]	0.065
BMI$		1.04	[0.63 ; 1.44]	<0.0001
leg length		−0.04 × 10−1	[−0.04 ; 0.04]	0.855
variability	−3.01		[−7.34 ; 1.32]	0.171
age*		0.01	[0.01 × 10−1 ; 0.02]	0.032
gender (0)		−0.21	[−0.74 ; 0.31]	0.426
BMI		−0.48 × 10−2	[−0.49 × 10−1 ; 0.39 × 10−1]	0.828
leg length		0.29 × 10−2	[−0.12 × 10−2 ; 0.71 × 10−2]	0.165
pace	0.83		[−2.98 ; 4.64]	0.666
age**		−0.18 × 10−1	[−0.28 × 10−1 ; −0.90 × 10−2]	0.0002
gender (0)*		−0.52	[−0.98 ; −0.06]	0.027
BMI*		−0.41 × 10−1	[−0.80 × 10−1 ; −0.29 × 10−2]	0.036
leg length		0.17 × 10−2	[−0.20 × 10−2 ; 0.53 × 10−2]	0.367
base of support**	−5.67		[−8.82 ; −2.52]	0.0005
age*		−0.89 × 10−2	[−0.17 × 10−1 ; −0.13 × 10−2]	0.023
gender (0)*		−0.61	[−0.99 ; −0.23]	0.002
BMI$		0.94 × 10−1	[0.62 × 10−1 ; 0.13]	<0.0001
leg length*		0.45 × 10−2	[0.14 × 10−2 ; 0.75 × 10−2]	0.004
base of support variability	−1.61		[−6.03 ; 2.82]	0.474
age		0.62 × 10−2	[−0.46 × 10−2 ; −0.17 × 10−1]	0.258
gender (0)		0.40	[−0.14 ; 0.94]	0.146
BMI		−0.04	[−0.85 × 10−1 ; 0.46 × 10−2]	0.078
leg length		0.24 × 10−2	[−0.19 × 10−2 ; 0.66 × 10−2]	0.276