Table 2.  ALSFRS-R total and sub-scores [median (inter-quartile range)] at the introduction of communication devices.

	Writing devices		Communication boards		Switch control devices		Eye control devices
Total a,c,f	32.0	(25.3–33.0)	19.0	(15.0–27.5)	24.0	(19.5–30.5)	13.0	(8.0–16.3)
Bulbar sub-score	6.0	(5.0–7.8)	6.0	(5.0–7.0)	7.0	(5.6–10.0)	5.0	(4.0–6.3)
Upper motor sub-score b,c,d,e	8.0	(6.0–9.0)	6.0	(5.0–7.0)	3.5	(0.0–5.0)	0.0	(0.0–0.0)
Gross motor sub-score a,c	7.0	(4.0–8.8)	2.0	(0.0–5.0)	3.0	(1.0–7.3)	0.0	(0.0–1.0)
Respiratory sub-score	11.0	(8.3–11.8)	10.0	(7.0–12.0)	11.0	(8.8–12.0)	7.0	(4.0–9.3)

^a Writing devices vs. communication boards (P<0.05), ^b writing devices vs. switch control devices (P<0.001), ^c writing devices vs. eye control devices (P<0.01), ^d communication boards vs. switch control devices (P<0.01), ^e communication boards vs. eye control devices (P<0.001), ^f switch control devices vs. eye control devices (P<0.01).