TABLE 4.

Jugular Vein CSAs and Ultrasound Velocities Compared across MS versus Non-MS Participants

Vein	Position		All MS Subjects				All Non-MS Subjects
			Right		Left		Right		Left
			No.	Mean±SD	No.	Mean±SD	No.	Mean±SD	No.	Mean±SD
Internal jugular CSA, cm2	Supine		205	0.80±0.03	206	0.60±0.03	70	0.84±0.06	70	0.67±0.05
	Upright		201	0.20±0.14	201	0.17±0.14a	69	0.22±0.16	67	0.22±0.18a
Internal jugular, cm/s	Supine	Max	204	60.40±36.41	204	50.85±30.44	70	64.73±38.22	70	52.05±29.19
		Min	204	21.35±18.09	204	16.82±14.60	70	19.35±19.59	70	16.23±17.41
	Upright	Max	199	75.80±46.71	198	57.95±41.37	68	75.63±38.51	66	50.14±33.16
		Min	199	52.63±36.71	198	37.05±32.15	68	50.55±30.59	66	31.88±27.93
Vertebral, cm/s	Supine	Max	190	29.86±19.68	175	28.43±18.09	64	28.41±20.63	59	28.34±23.95
		Min	190	13.73±13.57	175	11.17±9.26	64	11.36±12.27	59	10.00±16.58
	Upright	Max	190	45.43±27.01	185	42.44±28.79	60	42.50±24.26	57	47.61±33.32
		Min	190	33.29±21.09	185	30.02±22.00	60	32.92±20.85	57	35.89±28.32
Basal of Rosenthal, cm/s	Supine	Max	194	10.51±2.54	190	10.45±2.70	68	10.66±1.99	69	11.08±2.80
		Min	194	7.27±1.90	190	7.14±1.89	68	7.56±1.66	69	7.74±2.30
	Upright	Max	193	10.43±2.60	187	10.54±2.49	69	10.45±2.31	69	10.73±2.47
		Min	193	6.80±1.72	187	7.10±1.76	69	6.93±1.65	69	7.30±1.85
Galen, cm/s	Supine	Max	188	11.71±3.77			65	11.72±3.04
		Min	188	8.05±2.72			65	8.23±2.22
	Upright	Max	182	10.91±3.15			60	10.21±1.93
		Min	182	7.17±2.19			60	6.66±1.44

All 64 separate comparisons were not statistically significantly different between MS and non-MS subjects.

^ap≤0.03, MS vs non-MS. If Bonferroni corrected, statistical significance would be considered p<0.0008.

CSA=cross-sectional area; Max=maximum; Min=minimum; MS=multiple sclerosis; SD=standard deviation.