Table 2.

Results: Overall death rates, standardized mortality ratios (SMRs), and the effects of operative pathology and side of surgery

Patients (no.)Person-years of follow-upNo. of deaths (no. of SUDEP patients)Deaths: rate per person yearsSMR (95% CI)
* All deaths excluding those caused by an operative complication.
† Deaths related/likely related to the effects of seizures: SUDEP 6, status epilepticus 2, drowning 2, aspiration 2, accident 1.
‡ Mortality rate per person years: left MTS vs right MTS, p = 0.0128.
§ Only one death in this group was epilepsy related. The three deaths related to operative complications also occurred in this group.
SUDEP = sudden unexpected death in epilepsy; CI = confidence interval.
Overall cohort (299)2,72920 (6)1 /1364.5 (3.2–6.6)
Late*17 (6)1 /1613.7 (2.5–5.3)
Epilepsy related (late)13 (6)1 /210
SUDEP61 /455
Left-sided operations (154)1,4197 (1)1 /2034.7 (3.2–6.6)
Right-sided operations (145)1,31013 (4)1 /1015.4 (3.9–7.3)
Mesial temporal sclerosis (MTS) (165)1,46313 (5)1 /1136.5 (4.7–8.8)
Left (97)9303 (1)1 /3103.3 (2.1–4.8)
Right (68)53310 (4)1 /5332.0 (24.7–40.5)
Nonspecific pathology (40)3465 (1)1 /69§9.3 (7.1–11.9)
Other lesions (100)9202 (0)1 /4603.8 (1.6–7.1)