Table 4.

Period of treatment with glatiramer acetate between June 2003 and December 2006, and discontinuations of therapy; the only significant p value was observed for the period 6–12 months of glatiramer acetate therapy

Period of use	Total number of patients (n = 1131)	Percentage of total number of patients	Number of patients who interrupted treatment (n = 113)	Percentage of patients in that period who interrupted treatment
Up to 6 months	233	21%	22	9%
6 to 12 months	131	12%	35	27% (p < 0.001)
One year	167	15%	23	14%
Two years	330	29%	23	7%
Three years	236	21%	10	4%
Four years	34	3%	-	-