Table 3 Twenty-year outcome of those with benign disease in 1985 (EDSS score ⩽4 and disease duration ⩾10 years) by baseline EDSS score and disease duration

Baseline EDSS 1985	Duration of MS at baseline	N	No EDSS unknown	Non-MS-related deaths	No (%) of known EDSS scores reaching EDSS ⩾4	No (%) of known EDSS scores reaching EDSS ⩾6	No (%) of known EDSS scores reaching EDSS 10
0–2	0–4.9	17	2	2	8/13 (61.5%)	7/13 (53.8%)	4/13 (30.7%)
	5–9.9	12	1	1	8/10 (80%)	5/10 (50%)	0
	10–19.9	14	3	0	7/11 (63.6%)	7/11 (63.6%)	3/11 (27.3%)
	20+	9	1	3	4/5 (80%)	4/5 (80%)	1/5 (20%)
2.5–4	0–4.9	17	2	4	10/11 (90%)	9/11 (81.8%)	3/11 (27.3%)
	5–9.9	19	2	1	13/16 (81.3%)	13/16 (81.3%)	4/16 (25%)
	10–19.9	27	2	6	16/19 (84.2%)	15/19 (78.9%)	2/19 (10.5%)
	20+	7	1	6	7/7 (100%)	7/7 (100%)	3/7 (42.8%)

EDSS, Expanded Disability Status Scale; MS, multiple sclerosis.