Table 2.

Comparison of the prevalence of MRI features between ALS patients and controls.

	Corticospinal Tract FLAIR Hyperintensity	Corticospinal Tract T2 Hyperintensity	Motor Cortex SWI Hypointensity	Motor Cortex T2* Hypointensity	Selective Motor Cortex Atrophy
Patients	69/92 (75%)	42/92 (46%)	62/82 (76%)	11/43 (26%)	63/91 (69%)
Controls	28/87 (32%)	6/87 (7%)	13/33 (39%)	8/63 (13%)	43/88 (49%)
χ2-test (corrected)	p < 0.0001	p < 0.0001	p = 0.0011	n.s.	p = 0.027

Numerator indicates how many patients had the MRI feature and the denominator indicates in how many patients the sequence was available. n.s., not significant. T2* (or T2-star) is the whole name of the sequence.