Table 3.

Complications type and rates

Complication type	No./total responses*
All complications	18/100
Minor complications	12/100
Dural tear	9/100
Superficial wound infection	3/100
Major complications	6/100
Perioperative death within 30 days	1/100
Upper UTI†	1/100
Deep wound infection	2/100
Myocardial infarction (non-fatal)	1/100
Gastric ulcer	1/100

* One missing value. _† UTI; urinary tract infection.