Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 561

The DOI matches its Crossref record; 29 of the 29 references it cites were found in a registry or an index.

Phenobarbital for Febrile Seizures — Effects on Intelligence and on Seizure Recurrence

Open access
Farwell, Jacqueline R., Lee, Young Jack, Hirtz, Deborah G., Sulzbacher, Stephen I., Ellenberg, Jonas H., Nelson, Karin B.·1990·New England Journal of Medicine

Abstract

Phenobarbital is widely used in the treatment of children with febrile seizures, although there is concern about possible behavioral and cognitive side effects. In 217 children between 8 and 36 months of age who had had at least one febrile seizure and were at heightened risk of further seizures, we compared the intelligence quotients (IQs) of a group randomly assigned to daily doses of phenobarbital (4 to 5 mg per kilogram of body weight per day) with the IQs of a group randomly assigned to placebo. After two years, the mean IQ was 7.03 [corrected] points lower in the group assigned to phenobarbital than in the placebo group (95 percent confidence interval, -11.52 to -2.5, P = 0.0068 [corrected]). Six months later, after the medication had been tapered and discontinued, the mean IQ was 5.2 points lower in the group assigned to phenobarbital (95 percent confidence interval, -10.5 to 0.04, P = 0.052). The proportion of children remaining free of subsequent seizures did not differ significantly between the treatment groups. We conclude that phenobarbital depresses cognitive performance in children treated for febrile seizures and that this disadvantage, which may outlast the administration of the drug by several months, is not offset by the benefit of seizure prevention.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1056/nejm199002083220604

Cites

29 of 29 references verified0 citation errors · 0 not checkable

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cites

Show all 29 references

Cited by

See all 561

Metadata

Authors
Farwell, J. R., Lee, Y. J., Hirtz, D. G., Sulzbacher, S. I., Ellenberg, J. H., & Nelson, K. B.
Venue
New England Journal of Medicine
Published
1990-02-08
Volume
322
Issue
6
Pages
364-369
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2335372547
Cited by
561
References
29
FWCI
17.10
Type
journal article
Language
en
Open access
bronze

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Phenobarbital for Febrile Seizures — Effects on Intelligence and on Seizure Recurrence. https://app.cochat.ai/papers/10.1056/nejm199002083220604
The paper
Farwell, J. R., Lee, Y. J., Hirtz, D. G., Sulzbacher, S. I., Ellenberg, J. H., & Nelson, K. B. (1990). Phenobarbital for Febrile Seizures — Effects on Intelligence and on Seizure Recurrence. New England Journal of Medicine. https://doi.org/10.1056/nejm199002083220604

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.