Fig. 2

a The distribution of the level of pain after the procedure according to BPS, p = 0.007; b The level of pain after the procedure according to BPS stratified by age; c Distribution of treatment failure and retreatment based on primary surgical procedure. In 51 (43.2%) patients, the surgical treatment was unsatisfactory, i.e. they have undergone another surgical procedure or reported a pain equivalent to BPS 3 or more (p < 0.001 for both); d Survival until the second procedure is performed or the pain after the procedure reaches BPS 3 e Time to re-treatment for patients younger than 65 years (p < 0.001); c Time to re-treatment for patients 65 years and older (p < 0.001)