Table 2. The success rate of the end-result cohort (ER) and the preliminary cohort (PR) compared to the controls (BRAIST)¹¹⁾ with the help of the z-test. The differences were significant on p=0.01 level.

	Success rate	BRAIST (n=146)	t	Z	p
ER (n=28)	92.9 %	72%	−3.42	2.58	0.01
PR (n=55)	94.5%	72%	−4.67	2.58	0.01