Table 2.

Correlation between CSA and height, weight, and BMI.

		Correlation coefficient (P-value)
Nerve	Site	Height	Weight	BMI
Median	Wrist	0.213 (.035)	0.390 (<.001)	0.391 (<.001)
	Forearm	0.326 (.001)	0.397 (<.001)	0.310 (.001)
	Below-elbow	0.250 (.009)	0.332 (.001)	0.266 (.006)
	Antecubital fossa	0.359 (<.001)	0.425 (<.001)	0.332 (.001)
	Mid-arm	0.301 (.002)	0.438 (<.001)	0.402 (<.001)
	Axilla	0.409 (<.001)	0.481 (<.001)	0.368 (<.001)
	WFR	−0.144 (.159)	−0.133 (.272)	−0.04 (.695)
Ulnar	Wrist	0.318 (.001)	0.444 (<.001)	0.421 (<.001)
	Arterial split	0.225 (.020)	0.404 (<.001)	0.423 (<.001)
	CT outlet	0.367 (<.001)	0.479 (<.001)	0.396 (<.001)
	ME	0.266 (.006)	0.352 (<.001)	0.292 (.002)
	Proximal 2 cm to ME	0.237 (.014)	0.367 (<.001)	0.343 (<.001)
	Mid-arm	0.358 (<.001)	0.398 (<.001)	0.276 (.004)
	Axilla	0.413 (<.001)	0.460 (<.001)	0.345 (<.001)
Radial	Above SG	0.145 (.136)	0.275 (.004)	0.286 (.003)
	Spiral groove	0.095 (.333)	0.306 (.001)	0.382 (<.001)
	Antecubital fossa	−0.022 (.821)	0.156 (.109)	0.267 (.005)
SRS	Proximal forearm	−0.077 (.433)	−0.069 (.479)	−0.012 (.902)
PIN	Proximal forearm	0.188 (.053)	0.279 (.004)	0.231 (.017)
MACN	Mid-arm	0.271 (.005)	0.304 (.002)	0.218 (.024)
LACN	Elbow	0.372 (<.001)	0.378 (<.001)	0.233 (.016)
MC	Axilla	0.202 (.037)	0.190 (.051)	0.098 (.316

The correlation coefficient between the nerve CSA and height, weight, and BMI were calculated using Spearman's correlation. BMI = body mass index, CSA = cross-sectional area, CT = cubital tunnel, LACN = lateral antebrachial cutaneous nerve, MACN = medial antebrachial cutaneous nerve, MC = musculocutaneous nerve, ME = medial epicondyle, PIN = posterior interosseous nerve, SG = spiral groove, SRS = superficial radial sensory, WFR = wrist-to-forearm median nerve CSA ratio.