Table 3. CSAs, ΔCSAs and ΔUtpt results for all patients and for those with at least one abnormal measurement for each variable.

Patients were classified according to the WHO operational classification.

		All patients					Patients with at least one abnormal measurement
Variable	Nerve	PB		MB		p-value	PB		MB		p-value
CSA (mm2)	Ulnar (Upt)	n = 22		n = 166			n = 16		n = 114
		mean±SD	6.99±2.06	mean±SD	9.9±7.78	0.1110	mean±SD	7.64±1.91	mean±SD	11.64±8.79	0.0729
		95% CI	[6.07–7.9]	95% CI	[8.71–11.09]		95% CI	[6.63–8.66]	95% CI	[10–13.27]
		abnormal	3 (13.6%)	abnormal	48 (28.9%)		abnormal	3 (18.8%)	abnormal	48 (42.1%)
	Ulnar (Ut)	n = 22		n = 168			n = 16		n = 116
		mean±SD	8.56±5.48	mean±SD	11.8±9.99	0.0038*	mean±SD	9.53±6.14	mean±SD	13.88±11.4	0.0061*
		95% CI	[6.14–10.99]	95% CI	[10.28–13.32]		95% CI	[6.26–12.8]	95% CI	[11.78–15.97]
		abnormal	4 (18.2%)	abnormal	65 (38.7%)		abnormal	4 (25%)	abnormal	62 (53.5%)
	Median	n = 20		n = 166			n = 14		n = 116
		mean±SD	6.18±1.03	mean±SD	9.12±4.97	0.0015*	mean±SD	6.36±0.84	mean±SD	10.41±5.4	0.0002*
		95% CI	[5.7–6.66]	95% CI	[8.36–9.88]		95% CI	[5.87–6.84]	95% CI	[9.41–11.4]
		abnormal	0 (0%)	abnormal	54 (32.5%)		abnormal	0 (0%)	abnormal	54 (46.6%)
	Common Fibular	n = 22		n = 168			n = 16		n = 118
		mean±SD	16.76±13.09	mean±SD	17.38±9.18	0.1729	mean±SD	18.64±14.98	mean±SD	19.82±9.76	0.1911
		95% CI	[10.96–22.56]	95% CI	[15.99–18.78]		95% CI	[10.66–26.63]	95% CI	[18.04–21.6]
		abnormal	6 (27.3%)	abnormal	57 (33.9%)		abnormal	6 (37.5%)	abnormal	57 (48.3%)
ΔCSA (mm2)	Ulnar (Upt)	n = 11		n = 82			n = 8		n = 57
		mean±SD	1.65±1.93	mean±SD	4.12±7.74	0.2811	mean±SD	2.01±2.12	mean±SD	5.58±8.9	0.2267
		95% CI	[0.35–2.94]	95% CI	[2.42–5.82]		95% CI	[0.24–3.79]	95% CI	[3.22–7.95]
		abnormal	3 (27.3%)	abnormal	26 (31.7%)		abnormal	3 (37.5%)	abnormal	26 (45.6%)
	Ulnar (Ut)	n = 11		n = 83			n = 8		n = 57
		mean±SD	3.4±4.73	mean±SD	4.58±11.19	0.5560	mean±SD	4.41±5.25	mean±SD	6.3±13.17	0.4720
		95% CI	[0.22–6.58]	95% CI	[2.14–7.02]		95% CI	[0.02–8.8]	95% CI	[2.8–9.79]
		abnormal	3 (27.3%)	abnormal	35 (42.2%)		abnormal	3 (37.5%)	abnormal	35 (61.4%)
	Median	n = 10		n = 82			n = 7		n = 57
		mean±SD	0.79±0.55	mean±SD	1.97±3.11	0.3228	mean±SD	0.86±0.48	mean±SD	2.5±3.58	0.2181
		95% CI	[0.4–1.18]	95% CI	[1.28–2.65]		95% CI	[0.41–1.3]	95% CI	[1.55–3.45]
		abnormal	0 (0%)	abnormal	15 (18.3%)		abnormal	0 (0%)	abnormal	15 (26.3%)
	Common Fibular	n = 11		n = 84			n = 8		n = 59
		mean±SD	7.25±15.62	mean±SD	4.21±6.13	0.5256	mean±SD	9.39±18.14	mean±SD	5.47±6.94	0.5167
		95% CI	[0–17.74]	95% CI	[2.88–5.54]		95% CI	[0–24.55]	95% CI	[3.66–7.27]
		abnormal	3 (27.3%)	abnormal	31 (36.9%)		abnormal	3 (37.5%)	abnormal	31 (52.5%)
ΔUtpt (mm2)	Ulnar (Ut and Upt)	n = 22		n = 165			n = 10		n = 65
		mean±SD	3.35±4.87	mean±SD	4.41±5.95	0.1728	mean±SD	6.02±6.34	mean±SD	8.65±7.66	0.1652
		95% CI	[1.19–5.51]	95% CI	[3.49–5.32]		95% CI	[1.48–10.56]	95% CI	[6.74–10.54]
		abnormal	7 (31.8%)	abnormal	47 (28.5%)		abnormal	7 (70%)	abnormal	47 (72.3%)

n: number of nerves; SD: standard deviation; 95% CI: 95% confidence interval; abnormal: number of nerves with abnormal measurements and percentages in parenthesis (values were considered abnormal when they exceeded the mean + 2SD value obtained from healthy volunteers).

p-values were determined using the Wilcoxon test.

* Statistically significant.