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Each row is one question a systematic review asked: who, what, compared with what, and which outcome, with the effect it found and how certain that is. Words match anywhere in the field.

Limit to evidence status or GRADE (optional)

970 questions in 77 reviews · Epilepsy

current versions
No studies 190 · 19.6%Ungraded 42 · 4.3%Very low 135 · 13.9%Low 289 · 29.8%Moderate 242 · 24.9%High 72 · 7.4%

Ungraded means an effect was reported without a GRADE rating; it is not a gap. No studies means the review found nothing to answer the question. The six categories are a display order, not a score.

QuestionEffectEvidenceStatus / GRADE
Chloral hydrate oral (75 mg/kg) vs pentobarbital intravenous (5 mg/kg)
Proportion of children who successfully completed neurodiagnostic procedure without interruption by the child awakening · children undergoing neurodiagnostic procedures
Chloral hydrate as a sedating agent for neurodiagnostic procedures in children (2021) · Cochrane
no estimate extractedNRNo studies
Chloral hydrate oral (75 mg/kg) vs pentobarbital intravenous (5 mg/kg)
Proportion of children who required a further dose of either the same sedative agent or the addition of a different sedative agent · children undergoing neurodiagnostic procedures
Chloral hydrate as a sedating agent for neurodiagnostic procedures in children (2021) · Cochrane
no estimate extractedNRNo studies
Chloral hydrate oral (75 mg/kg) vs pentobarbital intravenous (5 mg/kg)
Time to adequate sedation (minutes or as measured by specific validated scales such as the Ramsay Sedation Score) · children undergoing neurodiagnostic procedures
Chloral hydrate as a sedating agent for neurodiagnostic procedures in children (2021) · Cochrane
no estimate extracted1 study · 70 participantsLow
Levetiracetam vs lamotrigine
Proportion with seizure freedom · people with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
RR 1.2 [0.53, 2.71]1 study · 67 participantsVery low
Levetiracetam vs phenobarbital
Reduction in seizure frequency of 50% or more · patients with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
RR 1.11 [0.78, 1.56]1 study · 66 participantsVery low
Levetiracetam vs phenobarbital
Proportion with seizure freedom in dominantly inherited AD · patients with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
no estimate extractedNRNo studies
Levetiracetam vs phenobarbital
Change in cognition · patients with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
no estimate extracted1 study · 66 participantsVery low
Levetiracetam vs phenobarbital
Change in neuropsychiatric symptoms · patients with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
no estimate extracted1 study · 66 participantsVery low
Levetiracetam vs phenobarbital
Improvement in quality of life · patients with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
no estimate extractedNRNo studies
Lamotrigine vs phenobarbital
Proportion with seizure freedom · patients with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
RR 0.84 [0.35, 2.02]1 study · 57 participantsVery low
Lamotrigine vs phenobarbital
Proportion with adverse events · patients with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
RR 0.68 [0.3, 1.53]1 study · 57 participantsVery low
Lamotrigine vs phenobarbital
Reduction in seizure frequency of 50% or more · patients with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
RR 0.91 [0.6, 1.38]1 study · 57 participantsVery low
Lamotrigine vs phenobarbital
Proportion with seizure freedom in dominantly inherited AD · patients with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
no estimate extractedNRNo studies
Lamotrigine vs phenobarbital
Change in cognition · patients with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
no estimate extracted1 study · 57 participantsVery low
Levetiracetam vs lamotrigine
Proportion with adverse events · people with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
RR 0.65 [0.25, 1.74]1 study · 67 participantsVery low
Lamotrigine vs phenobarbital
Change in neuropsychiatric symptoms · patients with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
no estimate extracted1 study · 57 participantsVery low
Lamotrigine vs phenobarbital
Improvement in quality of life · patients with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
no estimate extractedNRNo studies
Levetiracetam vs lamotrigine
Reduction in seizure frequency of 50% or more · people with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
RR 1.21 [0.84, 1.75]1 study · 67 participantsVery low
Levetiracetam vs lamotrigine
Proportion with seizure freedom in dominantly inherited AD · people with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
no estimate extractedNRNo studies
Levetiracetam vs lamotrigine
Change in cognition · people with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
no estimate extracted1 study · 67 participantsVery low
Levetiracetam vs lamotrigine
Change in neuropsychiatric symptoms · people with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
no estimate extracted1 study · 67 participantsVery low
Levetiracetam vs lamotrigine
Improvement in quality of life · people with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
no estimate extractedNRNo studies
Levetiracetam vs phenobarbital
Proportion with seizure freedom · patients with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
RR 1.01 [0.47, 2.19]1 study · 66 participantsVery low
Levetiracetam vs phenobarbital
Proportion with adverse events · patients with AD and epileptic seizures
Treatment of epilepsy for people with Alzheimer's disease (2021) · Cochrane
RR 0.44 [0.18, 1.07]1 study · 66 participantsVery low
Carisbamate vs placebo
50% or greater reduction in seizure frequency (responder rate) · people with drug‐resistant focal epilepsy
Carisbamate add‐on therapy for drug‐resistant focal epilepsy (2021) · Cochrane
RR 1.36 [1.14, 1.62]4 studies · 2211 participantsModerate
Carisbamate vs placebo
Seizure freedom · people with drug‐resistant focal epilepsy
Carisbamate add‐on therapy for drug‐resistant focal epilepsy (2021) · Cochrane
RR 2.43 [0.84, 7.03]1 study · 540 participantsVery low
Carisbamate vs placebo
Treatment withdrawal for any reason · people with drug‐resistant focal epilepsy
Carisbamate add‐on therapy for drug‐resistant focal epilepsy (2021) · Cochrane
RR 1.32 [0.82, 2.12]4 studies · 2211 participantsVery low
Carisbamate vs placebo
Treatment withdrawal due to adverse events · people with drug‐resistant focal epilepsy
Carisbamate add‐on therapy for drug‐resistant focal epilepsy (2021) · Cochrane
RR 1.8 [0.78, 4.17]4 studies · 2211 participantsVery low
Carisbamate vs placebo
Proportion of participants who experienced atleast 1 adverse event · people with drug‐resistant focal epilepsy
Carisbamate add‐on therapy for drug‐resistant focal epilepsy (2021) · Cochrane
RR 1.1 [0.93, 1.3]2 studies · 1084 participantsLow
Carisbamate vs placebo
Adverse events: dizziness · people with drug‐resistant focal epilepsy
Carisbamate add‐on therapy for drug‐resistant focal epilepsy (2021) · Cochrane
RR 2.06 [1.23, 3.44]4 studies · 2211 participantsVery low
Carisbamate vs placebo
Adverse events: somnolence · people with drug‐resistant focal epilepsy
Carisbamate add‐on therapy for drug‐resistant focal epilepsy (2021) · Cochrane
RR 1.82 [1.28, 2.58]4 studies · 2211 participantsLow
Modafinil vs placebo
Epworth Sleepiness Scale (ESS), week 3№ of participants: 101(2 RCTs) · idiopathic hypersomnia
Medications for daytime sleepiness in individuals with idiopathic hypersomnia (2021) · Cochrane
no estimate extractedNRHigh
Clarithromycin vs placebo
Average nocturnal sleep time from sleep diary, weeks 1 and 2№ of participants: 10(1 RCT) · idiopathic hypersomnia
Medications for daytime sleepiness in individuals with idiopathic hypersomnia (2021) · Cochrane
no estimate extractedNRLow
Clarithromycin vs placebo
Difficulty waking in the morning, average of weeks 1 and 2№ of participants: 10(1 RCT) · idiopathic hypersomnia
Medications for daytime sleepiness in individuals with idiopathic hypersomnia (2021) · Cochrane
no estimate extractedNRLow
Clarithromycin vs placebo
Psychomotor vigilance task (PVT) reciprocal of reaction time, change from baseline№ of participants: 10(1 RCT) · idiopathic hypersomnia
Medications for daytime sleepiness in individuals with idiopathic hypersomnia (2021) · Cochrane
no estimate extractedNRLow
Clarithromycin vs placebo
Functional Outcomes of Sleep Questionnaire (FOSQ), change from baseline№ of participants: 10(1 RCT) · idiopathic hypersomnia
Medications for daytime sleepiness in individuals with idiopathic hypersomnia (2021) · Cochrane
no estimate extractedNRLow
Clarithromycin vs placebo
Number of participants with any adverse events№ of participants: 10(1 RCT) · idiopathic hypersomnia
Medications for daytime sleepiness in individuals with idiopathic hypersomnia (2021) · Cochrane
OR 0.41 [0.01, 12.64]NRLow
Modafinil vs placebo
Number of naps/week, week 3№ of participants: 99(2 RCTs) · idiopathic hypersomnia
Medications for daytime sleepiness in individuals with idiopathic hypersomnia (2021) · Cochrane
no estimate extractedNRLow
Modafinil vs placebo
Clinical Global Impression ‐ Severity (CGI‐S), change from baseline№ of participants: 30(1 RCT) · idiopathic hypersomnia
Medications for daytime sleepiness in individuals with idiopathic hypersomnia (2021) · Cochrane
no estimate extractedNRModerate
Modafinil vs placebo
Clinical Global Impression ‐ Change (CGI‐C), proportion much improved or very much improved at week 3 № of participants: 70 (1 RCT) · idiopathic hypersomnia
Medications for daytime sleepiness in individuals with idiopathic hypersomnia (2021) · Cochrane
OR 5.14 [1.76, 15]NRModerate
Modafinil vs placebo
Maintenance of Wakefulness Test (MWT), week 3№ of participants: 99(2 RCTs) · idiopathic hypersomnia
Medications for daytime sleepiness in individuals with idiopathic hypersomnia (2021) · Cochrane
no estimate extractedNRHigh
Modafinil vs placebo
Effectiveness/performance, week 3№ of participants: 31(1 RCT) · idiopathic hypersomnia
Medications for daytime sleepiness in individuals with idiopathic hypersomnia (2021) · Cochrane
no estimate extractedNRModerate
Modafinil vs placebo
Number of participants with any adverse events№ of participants: 102(2 RCTs) · idiopathic hypersomnia
Medications for daytime sleepiness in individuals with idiopathic hypersomnia (2021) · Cochrane
OR 1.68 [0.28, 9.94]NRLow
Clarithromycin vs placebo
Epworth Sleepiness Scale (ESS), change from baseline№ of participants: 10(1 RCT) · idiopathic hypersomnia
Medications for daytime sleepiness in individuals with idiopathic hypersomnia (2021) · Cochrane
no estimate extractedNRLow
Clarithromycin vs placebo
Stanford Sleepiness Scale (SSS), change from baseline№ of participants: 10(1 RCT) · idiopathic hypersomnia
Medications for daytime sleepiness in individuals with idiopathic hypersomnia (2021) · Cochrane
no estimate extractedNRLow
Norethisterone vs placebo
Seizure freedom · women with seizures due to catamenial epilepsy
Treatments for seizures in catamenial (menstrual‐related) epilepsy (2021) · Cochrane
no estimate extractedNRNo studies
Progesterone vs placebo
Number of withdrawals from the study: for any reason · women with seizures due to catamenial epilepsy
Treatments for seizures in catamenial (menstrual‐related) epilepsy (2021) · Cochrane
RR 1.56 [0.81, 3]2 studies · 168 participantsModerate
Progesterone vs placebo
Adverse events: any adverse event · women with seizures due to catamenial epilepsy
Treatments for seizures in catamenial (menstrual‐related) epilepsy (2021) · Cochrane
RR 0.85 [0.59, 1.24]1 study · 130 participantsModerate
Progesterone vs placebo
Quality of life · women with seizures due to catamenial epilepsy
Treatments for seizures in catamenial (menstrual‐related) epilepsy (2021) · Cochrane
no estimate extractedNRNo studies
Norethisterone vs placebo
Responder rate · women with seizures due to catamenial epilepsy
Treatments for seizures in catamenial (menstrual‐related) epilepsy (2021) · Cochrane
no estimate extractedNRNo studies