Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 237

The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.

Age at Onset in Bipolar I Affective Disorder: Further Evidence for Three Subgroups

Bellivier, Frank, Golmard, Jean-Louis, Rietschel, Marcella, Schulze, Thomas G., Malafosse, Alain, Preisig, Martin, McKeon, Patrick, Mynett-Johnson, Lesley, Henry, Chantal, Leboyer, Marion·2003·American Journal of Psychiatry

Abstract

OBJECTIVE: Preliminary data suggested that there are three subgroups of bipolar affective disorder based on age at onset. The authors sought to replicate those findings and determine the cut-off age of each subgroup. METHOD: Admixture analysis was used to determine the best-fitting model for the observed ages at onset of 368 consecutively admitted patients. The results obtained were compared with those of the previously described model. The authors also investigated whether affected siblings are more likely to belong to the same theoretical age-at-onset subgroup as identified by admixture analysis. RESULTS: The existence of three subgroups defined by age at onset was confirmed. The mean ages estimated in this model were 17.4 years (SD=2.3), 25.1 years (SD=6.2), and 40.4 years (SD=11.3). Affected siblings were more likely to belong to the same theoretical subgroup. CONCLUSIONS: There are three age-at-onset subgroups of bipolar patients, and specific familial vulnerability factors might underlie each subgroup.

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 · 10.1176/appi.ajp.160.5.999

Cites

1 of 1 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 1 references

Cited by

See all 237

Metadata

Authors
Bellivier, F., Golmard, J.-L., Rietschel, M., Schulze, T. G., Malafosse, A., Preisig, M., McKeon, P., Mynett-Johnson, L., Henry, C., & Leboyer, M.
Venue
American Journal of Psychiatry
Published
2003-05-01
Volume
160
Issue
5
Pages
999-1001
ISSN
  • 0002-953X (ISSN-L)
  • 1535-7228
OpenAlex
W2135071346
Cited by
237
References
1
FWCI
5.45
Type
journal article
Language
en
Open access
closed

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: Age at Onset in Bipolar I Affective Disorder: Further Evidence for Three Subgroups. https://app.cochat.ai/papers/10.1176/appi.ajp.160.5.999
The paper
Bellivier, F., Golmard, J.-L., Rietschel, M., Schulze, T. G., Malafosse, A., Preisig, M., McKeon, P., Mynett-Johnson, L., Henry, C., & Leboyer, M. (2003). Age at Onset in Bipolar I Affective Disorder: Further Evidence for Three Subgroups. American Journal of Psychiatry. https://doi.org/10.1176/appi.ajp.160.5.999

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.