Table 2:

Correlations of arterial, venous, and secondary neck vessel frequency and the cross-sectional area with age and BMI in study groups^{^a}

	Age				Body Mass Index
	MS (n = 193)		HC (n = 193)		MS (n = 193)		HC (n = 193)
	R Value	P Value	R Value	P Value	R Value	P Value	R Value	P Value
Arterial CSA (mm²)
C2/3	−0.156	.031^{^b}	−0.163	.023^{^b}	0.130	.085	0.059	.449
C4	0.075	.298	0.045	.534	0.037	.626	−0.017	.830
C5/6	0.103	.156	0.122	.092	0.136	.073	0.095	.224
C7/T1	−0.049	.502	−0.003	.968	0.085	.266	0.047	.548
IJV CSA (mm²)
C2/3	0.257	<.001^{^b}	0.150	.37	0.098	.198	0.083	.287
C4	0.255	<.001^{^b}	0.177	.14^{^b}	0.146	.054	0.139	.075
C5/6	0.196	.006^{^b}	0.252	<.001^{^b}	0.339	<.001^{^b}	0.231	.003^{^b}
C7/T1	0.187	.009^{^b}	0.327	<.001^{^b}	0.375	<.001^{^b}	0.344	<.001^{^b}
Secondary CSA (mm²)
C2/3	0.039	.594	−0.060	.404	−0.192	.011^{^b}	−0.074	.347
C4	0.112	.122	−0.040	.584	−0.229	.002^{^b}	−0.121	.121
C5/6	0.047	.518	0.028	.696	−0.214	.004^{^b}	−0.064	.417
C7/T1	0.061	.398	−0.049	.498	−0.078	.307	−0.065	.405
No. of vessels
C2/3	0.013	.860	−0.149	.039^{^b}	−0.204	.007^{^b}	−0.153	.050^{^b}
C4	−0.460	.527	−0.211	.003^{^b}	−0.292	<.001^{^b}	−0.316	<.001^{^b}
C5/6	−0.076	.294	−0.141	.050^{^b}	−0.333	<.001^{^b}	−0.251	.001^{^b}
C7/T1	−0.060	.406	−0.155	.031^{^b}	−0.180	.017^{^b}	−0.174	.025^{^b}

↵a Spearman ranked correlations between age/BMI and the corresponding vascular variable were used.
↵b An α level of .05 was considered significant.