Table 2:

Group medians and IQRs of neck vessel total cross-sectional area at baseline, and follow-up in HC (n = 22) and MS (n = 69) groups

Vessel/Cervical Level	HC BL CSA (mm²) (Median) (IQR)	MS BL CSA (mm²) (Median) (IQR)	BL CSA MS vs HC (P Value)	HC FU CSA (mm²) (Median) (IQR)	MS FU CSA (mm²) (Median) (IQR)	FU CSA MS vs HC (P Value)	HC CSA BL vs FU (P Value)	MS CSA BL vs FU (P Value)	BL-to-FU MS vs HC CSA (P Value)
CCA–ICAs
C3	67.5 (28.1)	54.5 (28.3)	.298^{^a}	75.6 (30.7)	57.6 (32.9)	.248^{^a}	.223^{^c}	.993^{^c}	.699^{^e}
C4	73.4 (19.9)	79.3 (28.2)	.298^{^a}	73.2 (12.9)	77.5 (27.3)	.535^{^a}	.57^{^c}	.048^{^c,^g}	.365^{^e}
C5	69.7 (14.7)	75.7 (20.9)	.298^{^a}	67.0 (7.9)	70.9 (23.5)	.248^{^a}	.168^{^c}	.361^{^c}	.365^{^e}
C6	66.7 (10.8)	71.5 (16.7)	.318^{^a}	66.5 (9.7)	67.8 (19.4)	.474^{^a}	.223^{^c}	.222^{^c}	.603^{^e}
C7	69.1 (8.9)	69.7 (19.8)	.795^{^a}	66.3 (7.9)	66.5 (20.3)	.474^{^a}	.030^{^c,^g}	.005^{^c,^g}	.36^{^e}
WV	68.8 (16.4)	71.8 (26.2)	.605^{^b}	68.1 (15.8)	69.0 (26.7)	.632^{^b}	.206^{^d}	.012^{^d,^g}	.967^{^f}
VAs
C3	31.9 (6.5)	31.7 (6.9)	.597^{^a}	28.7 (11.5)	30.3 (7.2)	.718^{^a}	.070^{^c}	.028^{^c,^g}	.921^{^e}
C4	30.1 (8.5)	30.0 (5.9)	.597^{^a}	28.8 (10.8)	29.7 (6.5)	.779^{^a}	.288^{^c}	.028^{^c,^g}	.921^{^e}
C5	29.1 (8.0)	29.4 (6.0)	.597^{^a}	29.4 (10.6)	29.4 (6.3)	.948^{^a}	.570^{^c}	.051^{^c}	.921^{^e}
C6	28.4 (7.6)	29.7 (6.9)	.588^{^a}	27.6 (8.4)	28.9 (7.0)	.718^{^a}	.570^{^c}	.051^{^c}	.921^{^e}
C7	28.4 (9.2)	29.2 (8.1)	.588^{^a}	27.0 (8.0)	28.6 (8.0)	.718^{^a}	.570^{^c}	.028^{^c,^g}	.92^{^e}
WV	29.7 (7.9)	30.5 (7.5)	.406^{^b}	28.5 (9.8)	29.6 (7.9)	.377^{^b}	.119^{^d}	.012^{^d,^g}	.866^{^f}
IJVs
C3	100.8 (59.9)	105.3 (59.7)	.956^{^a}	94.8 (52.9)	90.6 (60.8)	.970^{^a}	.444^{^c}	.014^{^c,^g}	.987^{^e}
C4	111.4 (44.8)	121.8 (67.9)	.956^{^a}	107.6 (63.9)	102.8 (74.0)	.970^{^a}	.444^{^c}	.008^{^c,^g}	.987^{^e}
C5	117.1 (86.7)	122.4 (59.8)	.956^{^a}	103.9 (89.3)	107.9 (71.6)	.970^{^a}	.444^{^c}	.010^{^c,^g}	.987^{^e}
C6	116.7 (124.2)	118.7 (91.6)	.956^{^a}	86.7 (120.0)	101.4 (86.9)	.970^{^a}	.444^{^c}	.010^{^c,^g}	.987^{^e}
C7	116.9 (174.2)	126.3 (95.4)	.956^{^a}	109.4 (111.6)	113.2 (90.7)	.970^{^a}	.935^{^c}	.008^{^c,^g}	.987^{^e}
WV	111.9 (87.0)	119.5 (73.5)	.790^{^b}	99.3 (76.1)	103.8 (76.4)	.913^{^b}	.424^{^d}	.002^{^d,^g}	.680^{^f}

Note:—BL indicates baseline; FU, follow-up.
↵a–f Group medians and IQR of neck vessel total CSA at baseline and follow-up are reported for HC and MS at each cervical level and for the WV course. To evaluate CSA differences between HC and MS groups at baseline and at follow-up, an independent-samples Mann-Whitney U test (a) was used at each cervical level, while linear mixed models were used for the WV (b). To evaluate differences between baseline and follow-up within each group, the Wilcoxon signed-rank test (c) was used at each cervical level, while linear mixed models were used for the WV (d). To perform baseline-to-follow-up CSA comparison between groups, linear mixed models were used at each cervical level (e) and for the WV (f). The Benjamini-Hochberg procedure was performed to correct for multiple comparisons.
↵g An α level of .05 was considered significant.