Table 4.

Severity of facet tropisms according to levels

	C2-C3	C3-C4	C4-C5	C5-C6	C6-C7	P
Tropism-T						0.005
Symmetry (%)	137 (68.5)	165 (82.5)	163 (81.5)	159 (79.5)	157 (78.5)
Moderate (%)	43 (21.5)	31 (15.5)	31 (15.5)	32 (16)	33 (16.5)
Severe (%)	20 (10)	4 (2)	6 (3)	9 (4.5)	10 (5)
Tropism-S						0.196
Symmetry (%)	148 (74)	157 (78.5)	141 (70.5)	155 (77.5)	146 (73)
Moderate (%)	42 (21)	27 (13.5)	46 (23)	38 (19)	44 (22)
Severe (%)	10 (5)	16 (8)	13 (6.5)	7 (3.5)	10 (5)
Tropism-C						0.000
Symmetry (%)	122 (61)	155 (77.5)	157 (78.5)	162 (81)	151 (75.5)
Moderate (%)	51 (25.5)	35 (17.5)	37 (18.5)	30 (15)	42 (21)
Severe (%)	27 (13.5)	10 (5)	6 (3)	8 (4)	7 (3.5)

Tropism-T difference between right-side and left-side T-angle, Tropism-S difference between right-side and left-side S-angle, Tropism-C difference between right-side and left-side C-angle