Table 1.

Demographic and clinical characteristics of participants

	ALS	Controls	Statistic
Age (years)	52.6 (11.6)	52.4 (7.2)	Mann-Whitney U = 52.5, Z = −0.239, p = 0.811
Gender	9 M: 5F	6 M: 2F	Fisher’s exact test p = 1.0
NART-estimated IQ	118.0 (12.6)	124.6 (2.7)	Mann-Whitney, U = 38.0,
			Z = −1.023, p = 0.306
HADS anxiety (max 21)	7.1 (5.1)	5.8 (2.3)	Mann-Whitney U = 47.0,
			Z = 0.620, p = 0.536
HADS depression (max 21)	4.7 (3.1)	2.5 (2.9)	Mann-Whitney U = 31.5,
			Z = −1.685, p = 0.092
HADS depression (modified)* (max 18)	2.7 (2.7)	1.8 (2.0)	Mann-Whitney U = 43.0,
			Z = −0.909, p = 0.363
ALSSS		N/A	N/A
Bulbar (max 20)	16.5 (4.2) Range 8–20
Spinal (max 20)	14.9 (3.9) Range 8–19
Total (max 40)	32.1 (4.9) Range 23–39

All values mean (SD)

NART National Adult Reading Test, HADS Hospital Anxiety and Depression Scale, ALSSS ALS Severity Scale

* Item “I feel as if I am slowed down” removed