Table 2

Pearson’s regression coefficients

		Wrist SAP				m. mal. SAP				Percent of fibres
		μV	%			μV	%			>7 μ	>9 μ	>11 μ
Pearson’s regression coefficient:
GAA1 size	−0.639^***	−0.660^***		−0.353^2-150	−0.570^***		−0.872^***	−0.802^**	−0.856^***
GAA2 size	−0.027	−0.023		−0.095	−0.066		−0.142	0.129	0.057
Disease duration	0.214	0.257		0.098	0.279		0.779^**	0.672^2-150	0.690^2-150

↵2-150 p<0.05; ^** p<0.01; ^*** p<0.001.
SAP= sensory action potential; m mal=medial malleolus; control values: n=68; age range=15–44 years; wrist SAP mean = 14.3 μV (range 6–16); m mal SAP mean = 2.16 μV (range 0.2–3).