From: Evaluation of an electronic diary for improvement of adherence to interferon beta-1b in patients with multiple sclerosis: design and baseline results of an observational cohort study
Previous treatment
Total
PD
DiD
p-value
No
n patients
498
223
275
age [years] - mean (SD)
37.3 (10.4)
38.6 (10.6)
36.3 (10.1)
0.011
Yes
197
91
106
40.6 (9.7)
42.5 (10.1)
39.0 (9.2)
0.013