From: Who says “no” to participating in stroke clinical trials and why: an observational study from the Vancouver Stroke Program
Retrospective
Prospective
p value
Total approached (n)
132
103
–
Refusal Rate (n (%))
51 (39)
42 (41)
0.74a
Mean age (years ± SD)
69.4 ± 10.3
72.9 ± 8.9
0.007b
Male (n (%))
81 (61)
51 53 (52)
0.15a