2HELPS2B (cEEG seizure risk)
2HELPS2B score (Struck 2017): a 0-7 estimate of electrographic-seizure risk on continuous EEG from BIRDs (+2), periodic/rhythmic patterns (+1), sporadic epileptiform discharges, frequency > 2 Hz, plus features, and prior clinical seizure.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Brief potentially-ictal rhythmic discharges
- Yes
- Sporadic epileptiform discharges
- Yes
Result: 2HELPS2B 3/7: about a 50% calibrated risk of an electrographic seizure within 72 hours on continuous EEG.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Risk lookup
- calibrated 72-hour seizure risk by total: 0 ~5%, 1 ~12%, 2 ~27%, 3 ~50%, 4 ~73%, 5 ~88%, 6 or 7 above 95%. Fixed table; no model at render time.
What you enter
- Brief potentially-ictal rhythmic discharges (+2)
- LPDs / LRDA / BIPDs (+1)
- Sporadic epileptiform discharges (+1)
- Periodic / rhythmic pattern > 2 Hz (+1)
- Plus features (+1)
- Prior seizure history (+1)
How this is calculated
- Components
- B(I)RDs (+2); LPDs/LRDA/BIPDs, sporadic discharges, frequency > 2 Hz, plus features, and prior seizures (+1 each); total 0-7.
Struck AF, Ustun B, Ruiz AR, et al. Association of an electroencephalography-based risk score with seizure probability in hospitalized patients. JAMA Neurol. 2017;74(12):1419-1424. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.