Abstract
OBJECTIVE: To identify clinical and EEG biomarkers of drug resistance in adults with idiopathic generalized epilepsy. METHODS: We conducted a case-control study consisting of a discovery cohort and a replication cohort independently assessed at 2 different centers. In each center, patients with the idiopathic generalized epilepsy phenotype and generalized spike-wave discharges on EEG were classified as drug-resistant or drug-responsive. EEG changes were classified into predefined patterns and compared between the 2 groups in the discovery cohort. Factors associated with drug resistance in multivariable analysis were tested in the replication cohort. RESULTS: The discovery cohort included 85 patients (29% drug-resistant and 71% drug-responsive). Their median age at assessment was 32 years and 50.6% were female. Multivariable analysis showed that higher number of seizure types ever experienced (3 vs 1: odds ratio [OR] = 31.1, 95% confidence interval [CI]: 4.5-214, p < 0.001; 3 vs 2: OR = 14.6, 95% CI: 2.3-93.1, p = 0.004) and generalized polyspike train (burst of generalized rhythmic spikes lasting less than 1 second) during sleep were associated with drug resistance (OR = 10.8, 95% CI: 2.4-49.4, p = 0.002). When these factors were tested in the replication cohort of 80 patients (27.5% drug-resistant and 72.5% drug-responsive; 71.3% female; median age 27.5 years), the proportion of patients with generalized polyspike train during sleep was also higher in the drug-resistant group (OR = 4.0, 95% CI: 1.35-11.8, p = 0.012). CONCLUSION: Generalized polyspike train during sleep may be an EEG biomarker for drug resistance in adults with idiopathic generalized epilepsy.
| Original language | English |
|---|---|
| Pages (from-to) | e1822-e1830 |
| Number of pages | 9 |
| Journal | Neurology |
| Volume | 91 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - 6 Nov 2018 |
Cite this
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Generalized polyspike train : An EEG biomarker of drug-resistant idiopathic generalized epilepsy. / Sun, Yanping; Seneviratne, Udaya Kumara; Perucca, Piero Cesare; Chen, Zhibin; Tan, Meng; O'Brien, Terence John; D'souza, Wendyl; Kwan, Kwok Leung Patrick.
In: Neurology, Vol. 91, No. 19, 06.11.2018, p. e1822-e1830.Research output: Contribution to journal › Article › Research › peer-review
TY - JOUR
T1 - Generalized polyspike train
T2 - An EEG biomarker of drug-resistant idiopathic generalized epilepsy
AU - Sun, Yanping
AU - Seneviratne, Udaya Kumara
AU - Perucca, Piero Cesare
AU - Chen, Zhibin
AU - Tan, Meng
AU - O'Brien, Terence John
AU - D'souza, Wendyl
AU - Kwan, Kwok Leung Patrick
PY - 2018/11/6
Y1 - 2018/11/6
N2 - OBJECTIVE: To identify clinical and EEG biomarkers of drug resistance in adults with idiopathic generalized epilepsy. METHODS: We conducted a case-control study consisting of a discovery cohort and a replication cohort independently assessed at 2 different centers. In each center, patients with the idiopathic generalized epilepsy phenotype and generalized spike-wave discharges on EEG were classified as drug-resistant or drug-responsive. EEG changes were classified into predefined patterns and compared between the 2 groups in the discovery cohort. Factors associated with drug resistance in multivariable analysis were tested in the replication cohort. RESULTS: The discovery cohort included 85 patients (29% drug-resistant and 71% drug-responsive). Their median age at assessment was 32 years and 50.6% were female. Multivariable analysis showed that higher number of seizure types ever experienced (3 vs 1: odds ratio [OR] = 31.1, 95% confidence interval [CI]: 4.5-214, p < 0.001; 3 vs 2: OR = 14.6, 95% CI: 2.3-93.1, p = 0.004) and generalized polyspike train (burst of generalized rhythmic spikes lasting less than 1 second) during sleep were associated with drug resistance (OR = 10.8, 95% CI: 2.4-49.4, p = 0.002). When these factors were tested in the replication cohort of 80 patients (27.5% drug-resistant and 72.5% drug-responsive; 71.3% female; median age 27.5 years), the proportion of patients with generalized polyspike train during sleep was also higher in the drug-resistant group (OR = 4.0, 95% CI: 1.35-11.8, p = 0.012). CONCLUSION: Generalized polyspike train during sleep may be an EEG biomarker for drug resistance in adults with idiopathic generalized epilepsy.
AB - OBJECTIVE: To identify clinical and EEG biomarkers of drug resistance in adults with idiopathic generalized epilepsy. METHODS: We conducted a case-control study consisting of a discovery cohort and a replication cohort independently assessed at 2 different centers. In each center, patients with the idiopathic generalized epilepsy phenotype and generalized spike-wave discharges on EEG were classified as drug-resistant or drug-responsive. EEG changes were classified into predefined patterns and compared between the 2 groups in the discovery cohort. Factors associated with drug resistance in multivariable analysis were tested in the replication cohort. RESULTS: The discovery cohort included 85 patients (29% drug-resistant and 71% drug-responsive). Their median age at assessment was 32 years and 50.6% were female. Multivariable analysis showed that higher number of seizure types ever experienced (3 vs 1: odds ratio [OR] = 31.1, 95% confidence interval [CI]: 4.5-214, p < 0.001; 3 vs 2: OR = 14.6, 95% CI: 2.3-93.1, p = 0.004) and generalized polyspike train (burst of generalized rhythmic spikes lasting less than 1 second) during sleep were associated with drug resistance (OR = 10.8, 95% CI: 2.4-49.4, p = 0.002). When these factors were tested in the replication cohort of 80 patients (27.5% drug-resistant and 72.5% drug-responsive; 71.3% female; median age 27.5 years), the proportion of patients with generalized polyspike train during sleep was also higher in the drug-resistant group (OR = 4.0, 95% CI: 1.35-11.8, p = 0.012). CONCLUSION: Generalized polyspike train during sleep may be an EEG biomarker for drug resistance in adults with idiopathic generalized epilepsy.
UR - http://www.scopus.com/inward/record.url?scp=85056265453&partnerID=8YFLogxK
U2 - 10.1212/WNL.0000000000006472
DO - 10.1212/WNL.0000000000006472
M3 - Article
VL - 91
SP - e1822-e1830
JO - Neurology
JF - Neurology
SN - 0028-3878
IS - 19
ER -