Table 3. Descriptive statistics of initial values of the model parameters.

The initial values were equal to the optimal values estimated. Dx is the rate of progression, and D50 is the time since symptoms onset in months at ALSFRS-R =24.

SD: standard deviation.

	N	Minimum	Maximum	Mean	SD
dx	7	0·08	0·40	0·2117	0·11187
D50	7	59·14	282·00	135·9184	73·11256