Table 3.

Mean ± SD age at onset, age at death and duration of illness for the three Newcastle cases with expansion in C9ORF72, and the 13 Manchester cases, overall, and stratified into those with shorter (cases 23–27) and longer (28–35) disease durations

Group	Age at onset (years)	Age at death (years)	Duration of illness (years)
Newcastle cases 1–3	67.7 ± 4.5	70.0 ± 5.6	2.3 ± 1.3
Manchester cases 23–27	64.2 ± 8.1	66.6 ± 8.9	2.4 ± 0.9
Manchester cases 28–35	58.5 ± 6.4	67.1 ± 4.9	8.6 ± 4.4
Manchester cases 23–35	60.7 ± 7.4	66.9 ± 6.4	6.2 ± 4.6