Table 4

The 6-month, 1-year and 5-year cumulative risks (CRs) of postoperative de novo epilepsy in neurosurgical patients according to the craniotomy being supratentorial or infratentorial

Total no. of patients*Patients with epilepsyCR 6 months, %
(95% CI)
CR 1 year, %
(95% CI)
CR 5 years, %
(95% CI)
Supratentorial46779179.5 (8.7 to 10.4)13.5 (12.6 to 14.6)19.6 (18.4 to 20.8)
Infratentorial355303.4 (1.9 to 5.9)3.7 (2.1 to 6.2)7.8 (5.4 to 11.3)
  • *Patients in whom it was impossible to distinguish between infratentorial or supratentorial craniotomies from either the procedure or diagnostic code were excluded from this analysis.

  • ‚ĆCumulative risks are the summation of patients alive with epilepsy and deceased with epilepsy.