Cited by 159Schizophrenia research and treatmentGlobal Cancer Incidence and ScreeningCancer, Stress, Anesthesia, and Immune Response

Reduced cancer incidence among patients with schizophrenia

Open access
Barak, Yoram, Achiron, Anat, Mandel, Matilda, Mirecki, Ilona, Aizenberg, Dov·2005·Cancer

Abstract

BACKGROUND: The incidence of cancer in patients with schizophrenia has been conversely reported to be higher, lower, or similar to that in the general population. The effects of lifestyle factors such as excess smoking, exposure to neuroleptic medications, and genetic factors that may influence the incidence of cancer in this group are not clear. The current study was performed to evaluate the frequency of cancer in a large cohort of patients with schizophrenia and to determine the standardized incidence ratios (SIRs) of any malignancy in this group. METHODS: Data regarding the design, setting, and participants of the current study were analyzed from a cohort of 3226 patients with schizophrenia who were enrolled in the computerized health registry of the Abarbanel Mental Health Center between1993–2003. The mean age of the patients at the time of the diagnosis of cancer was 49 ± 14.7 years, with the majority of patients (61%) being male. All patients with schizophrenia records in the database were combined with the records of the Israeli National Cancer Registry to identify pathologically confirmed cancer comorbidity. The cancer incidence rates among patients with schizophrenia were compared with the expected incidence in an age‐matched and gender‐matched general population sample for the same time interval. RESULTS: Among 1247 female patients with schizophrenia, 22 (1.8%) developed breast cancer and 68 (5.5%) developed cancers of any type. Fifty‐two of the 1979 male schizophrenic patients (2.6%) developed cancer. The SIRs were 0.58 (95% confidence interval [95% CI], 0.48–0.69) with a P value of < 0.05 for all cancers in the cohort, and 0.60 (95% CI, 0.37–0.90) for female breast cancer. CONCLUSIONS: The results of the current study demonstrate a reduced risk of cancer in patients with schizophrenia. The mechanisms responsible for the lower risk need be investigated further. Cancer 2005. © 2005 American Cancer Society.

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 · 10.1002/cncr.21574

Cites

25 of 25 references verified0 citation errors · 0 not checkable

Statistics

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

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

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

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

Cites

Flagged first, then by citations

1 of the 26 references couldn’t be matched to a known paper.

Research works printed but not linked: 5

  1. Dupont A, Jensen OM, Stromgren E, Jablensky A. Incidence of cancer in patients diagnosed as schizophrenic in Den- mark. In: ten Horn GHMM, Giel R, Gulbinat WH, Henderson JH, editors. Psychiatric case registers in public health. Am- sterdam: Elsevier, 1986:229 -239.
  2. Barak Y, Mirecki I, Knobler HY, Natan Z, Aizenberg D. Sui- cidality and second generation antipsychotics in schizo- phrenia patients: a case-controlled retrospective study dur- ing a 5-year period. Psychopharmacology (Berl). 2004;175: 215-219. Epub 2004 Feb 4.
  3. Jeste DV, Gladsjo JA, Lindamer LA, Lacro JP. Medical comor- bidity in schizophrenia. Schizophr Bull. 1996;22:413-430.
  4. Shalev AY, Abaramowitz MZ, Kaplan De-Nour A. Structured clinical interview for axis I DSM-IV patient edition. Jerusa- lem: Hadassah University Hospital, 1994.
  5. Dalton SO, Munk Laursen T, Mellemkjaer L, Johansen C, Mortensen PB. Schizophrenia and the risk for breast cancer. Schizophr Res. 2003;62:89 -92.

Cited by

Sorted by citations

Authors
Barak, Y., Achiron, A., Mandel, M., Mirecki, I., & Aizenberg, D.
Affiliations
Tel Aviv University (IL)
Corresponding author
Barak, Yoram
Venue
Cancer
Publisher
Wiley
Published
2005-11-15
Volume
104
Issue
12
Pages
2817-2821
ISSN
  • 0008-543X (ISSN-L)
  • 1097-0142
OpenAlex
W1535192849
Cited by
159
References
26
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 11 · 2022: 8 · 2021: 9 · 2020: 8 · 2019: 7 · 2018: 10 · 2017: 4 · 2016: 9 · 2015: 8 · 2014: 12 · 2013: 11 · 2012: 7
FWCI
3.80
Type
journal article
Language
en
Open access
Locations
  • Cancer (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Health Sciences › Medicine › Oncology › Global Cancer Incidence and Screening
  • Health Sciences › Medicine › Psychiatry and Mental health › Cancer, Stress, Anesthesia, and Immune Response
Keywords
schizophrenia, cancer incidence, breast cancer, standardized incidence ratio, cancer comorbidity, antipsychotic drugs, smoking, genetic factors, psychiatric patients
MeSH terms
Adult, Aged, Female, Humans, Israel, Male, Middle Aged, Neoplasms, Prognosis, Registries, Schizophrenia, Severity of Illness Index, Cohort Studies, Comorbidity, Incidence, Survival Rate, Confidence Intervals, Odds Ratio, Age Distribution, Sex Distribution, Risk Assessment

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