Data analysis:
We analyzed our data using review manager. Depending on heterogeneity we
either used fixed effect model (IQ<75%) or random effect
model (IQ>75%)
Subgroup analysis and investigation of heterogeneity
Due to the limited number of studies included we were unable to carry
any subgroup analysis. If more trials were available it would have been
suitable to analyze according to age (more vs. less than 65 years),
gender (Male vs. Female), Follow up time (more vs. less than 12 months),
and generation of cryoablation used (1st vs 2nd vs
3rd).