Table 2. Comparisons of variables between clusters

Variables	Cluster 1 (N=22)	Cluster 2 (N=32)	Cluster 3 (N=23)	Cluster 4 (N=35)	F	p
Age (yr)	38.82 ± 7.00	31.06 ± 4.60	50.91±3.50	34.46 ± 6.40	60.152	<0.001
Height (cm)	172.41 ± 6.40	167.59 ± 7.30	174.52 ± 5.30	176.31 ± 5.80	1.850	0.142
Weight (kg)	74.95 ± 11.50	67.12 ± 9.70	66.09 ± 9.70	70.17 ± 9.00	3.692	0.014
BMI (kg/m2)	25.18 ± 3.32	22.54 ± 3.29	21.60 ± 2.27	22.59 ± 2.87	5.794	<0.001
Work duration (d)	663.73 ± 466.10	316.97 ± 201.80	388.22 ± 172.10	387.51 ± 206.80	7.435	<0.001
NH in sitting (cm)	4.62 ± 0.60	4.95 ± 0.46	4.45 ± 0.61	5.09 ± 0.65	6.786	<0.001
NH in standing (cm)	4.00 ± 0.63	3.84 ± 0.51	3.67 ± 0.47	4.68 ± 0.65	17.799	<0.001
ND (cm)	0.63 ± 0.29	1.11 ± 0.17	0.77 ± 0.37	0.41 ± 0.22	40.622	<0.001
RCSP (°)	6.66 ± 2.60	1.65 ± 2.41	1.70 ± 3.57	–0.75 ± 2.87	29.417	<0.001
YBT-anterior	71.05 ± 9.53	67.84 ± 7.96	72.35 ± 7.31	73.00 ± 7.74	2.456	0.067
YBT-posteromedial (cm/leg length %)	89.71 ± 15.86	83.60 ± 15.23	82.45 ± 11.64	90.81 ± 12.63	2.515	0.062
YBT-posterolateral (cm/leg length %)	74.57 ± 15.88	66.18 ± 16.37	67.78 ± 14.97	77.76 ± 13.63	3.900	0.011

BMI, body mass index; NH, navicular height; ND, navicular drop; YBT, Y-balance test.