Table 3 Relationship between pathological staging and clinical progression

Gender (M:F)

5:3

10:6

6:3

0.628^a

Mean age at onset (SD)

60 (9)

58 (6)

70 (8)*

0.007^b

Mean age at death (SD)

61 (9)

61 (6)

71 (8)*

0.017^b

Mean duration since diagnosis (SD)

1.5 (0.7)

3.5 (1.7)*

1.4 (0.6)

0.002^b

Bulbar onset (N)

3

4

2

0.904^a

Upper limb onset (N)

2

6

3

Lower limb onset (N)

3

6

4