Measurement of Bed Turning and Comparison with Age, Gender, and Body Mass Index in a Healthy Population: Application of a Novel Mobility Detection System

Table 4

Association between BMI and turning ability of healthy volunteers.

	BMI < 27 kg/m^2		BMI ≥ 27 kg/m^2
	𝑛^a	Mean ± SD	𝑛	Mean ± SD	𝑃 value^†
Turn time (sec)	440	5.71±1.08	140	5.80±0.90	0.782
TL (cm)	440	23.30±7.85	140	27.89±9.77	0.203
Turn speed (cm/sec)	440	4.16±1.57	140	4.89±1.76	0.292
Turn peak time (ds)	440	8.16±7.06	140	8.52±8.12	0.802
Turn force (kg·m/s²)	440	61.30±11.05	140	75.86±12.40	0.007*
Back time (sec)	440	5.14±1.27	140	5.51±2.47	0.160
BL (cm)	440	23.52±7.87	140	28.19±9.82	0.202
Back speed (cm/sec)	440	4.70±1.71	140	5.39±2.10	0.366
Back peak time (ds)	440	10.47±11.69	140	12.75±6.57	0.161
Back force (kg·m/s²)	440	61.84±11.34	140	76.80±12.96	0.007*
Turn-weight ratio	440	1.044±0.115	140	0.957±0.123	0.077
Back-weight ratio	440	1.053±0.115	140	0.969±0.131	0.096

aNumbers of measurements; ^†determined by repeated measures ANOVA (within-subject effect).
*: 𝑃<0.05 indicated statistical significance.