Table 2.

Demographic, clinical, laboratory, and electrodiagnostic data.

Patient	Age	Sex	ICU stay	Clinical features	Laboratory findings (peak levels)						NCS/EMG: time since disease onset	Sensory NCS		Motor NCS				EMG
					CK	CRP	IL-6	D-dimer	WBC	Lymphocyte		SNAP amplitude	sNCV	CMAP amplitude	CMAP duration	DML	mNCV	Proximal muscles*
			[weeks]		[U/l]	[mg/l]	[pg/ml]	[mg/l]	[×103/μl]	[×103/μl]	[weeks]	[μV]	[m/s]	[mV]	[ms]	[ms]	[m/s]
					40–220	<0.8	<7.0	<0.5	3.6–10.5	1.1–4.5
1	77	M	6	Proximal weakness and muscle wasting in upper more than lower limbs; myalgia; fatigue	4,002	15.9	225.2	1.5	10.1	2.8	7	L median: 15.2	50	L median: 4.2	9.3	3.9	48	Myopathic
												R ulnar: 12.4	48	R ulnar: 5.7	13.7	2.9	55
												R sural: 6.3	47	L peroneal: 2.1	7.3	3.1	40
														R tibial: 2.4	4.2	4.0	41
2	58	M	3	Predominantly proximal weakness in four limbs; hyporeflexia; myalgia	6,732	17.1	343.6	2.1	9.9	4.6	4	L median: 22.5	49	L median: 3.9	9.0	3.8	48	Myopathic
												R ulnar: 25.8	51	R ulnar: 4.8	8.7	2.5	50
												R sural: 9.5	48	L peroneal: 1.2	6.5	4.0	39
														R tibial: 2.2	6.7	4.1	40

Laboratory data were obtained during intensive care. Clinical and electrodiagnostic data were obtained during neurorehabilitation.

M, male; F, female; ICU, intensive care unit; CK, creatine kinase; CRP, C-reactive protein; WBC, white blood cell count; IL, interleukin; NCS, nerve conduction study; EMG, electromyography; SNAP, sensory nerve action potential; sNCV, sensory nerve conduction velocity; CMAP, compound muscle action potential; DML, distal motor latency; mNCV, motor nerve conduction velocity; R, right; L, left.

The upper limits of normality (mean + 2 SD) for distal CMAP duration using a low frequency filter of 2 Hz are: median nerve = 7.3 ms, ulnar nerve = 7.5 ms, peroneal nerve = 7.3 ms, tibial nerve = 6.8 ms (12); abnormal values are marked in bold.

^*Left deltoid, right triceps brachii, left iliopsoas, and right rectus femoris muscles.