Table 2.

Incidence data calculated for each SOD1 mutation, for the application of the Armitage and Doll mathematical model.

SOD1 Mutation	Month	No. of Cases	No. of Susceptible Subjects	Monthly Incidence (%)	Log Age	Log Incidence
G93A	2	35	272	12.9	0.30	1.11
	3	476	2498	19.1	0.48	1.28
	4	1018	2798	36.4	0.60	1.56
	5	380	1025	37.1	0.70	1.57
	6	78	183	42.9	0.78	1.63
G85R	8	6	198	3.0	0.90	0.48
	9	31	1326	2.3	0.95	0.37
	10	62	1404	4.4	1.00	0.65
	11	129	1258	10.3	1.04	1.01
	12	106	943	11.2	1.08	1.05
	13	86	430	20.0	1.11	1.30
	14	47	125	37.6	1.15	1.58
G37R	4	21	469	4.5	0.60	0.65
	5	39	402	9.7	0.70	0.99
	6	19	362	5.2	0.78	0.72
	7	29	355	8.2	0.85	0.91
	8	56	401	14.0	0.90	1.15
	9	37	183	20.2	0.95	1.31
	10	16	114	14.0	1.00	1.15
	11	24	111	21.6	1.04	1.33
	12	32	131	24.4	1.08	1.39
	13	13	44	29.5	1.11	1.47
H46R	4	10	96	10.4	0.60	1.02
	5	65	288	22.6	0.70	1.35
	6	44	123	35.8	0.78	1.55
	7	8	14	57.6	0.85	1.76