Cited by 23Dementia and Cognitive Impairment ResearchTreatment of Major DepressionPharmaceutical Practices and Patient Outcomes

The DOI matches its Crossref record; 65 of the 65 references it cites were found in a registry or an index; 14 of the 41 sources its claims cite were checked for support.

Risk of Dementia Among Elderly Nursing Home Patients Using Paroxetine and Other Selective Serotonin Reuptake Inhibitors

Open access

Abstract

OBJECTIVE: Selective serotonin reuptake inhibitors (SSRIs) are the first line of treatment for depression. Among the SSRIs, paroxetine has strong anticholinergic properties and may lead to increased risk of adverse cognitive outcomes among elderly patients. This study evaluated the comparative risk of dementia associated with use of paroxetine and other SSRIs among elderly nursing home patients. METHODS: A retrospective cohort study using propensity score matching was conducted with 2007-2010 Minimum Data Set-linked Medicare data. The study population included elderly nursing home patients with depression who were new users of SSRIs. Patients were followed for a maximum of two years after index SSRI use. The risk of dementia was modeled by using a robust Cox proportional hazards model to account for clustering within matched users of paroxetine and other SSRIs. RESULTS: The unmatched cohort included 19,952 new users of SSRIs; 1,898 used paroxetine, and 18,054 used other SSRIs. In the propensity-matched cohort of 3,796 patients, the unadjusted incidence of dementia was 7.5% for users of paroxetine and 8.6% for users of other SSRIs. There was no difference in the risk of dementia for users of paroxetine or other SSRIs. These study findings remained robust in multiple sensitivity analyses involving various measures of dementia. CONCLUSIONS: Compared with use of other SSRIs, use of paroxetine was not associated with higher risk of dementia among elderly nursing home patients with depression. Future studies are needed to evaluate the impact of paroxetine on other cognition measures.

Overview

AI snapshot

Written from the paper’s full text.

TL;DR

In elderly nursing home patients with depression, new use of paroxetine was not associated with a higher risk of dementia compared with other SSRIs. The propensity-matched analysis found similar dementia incidence and no significant difference in risk.

Key findings

  • The unmatched cohort included 19,952 new SSRI users: 1,898 paroxetine users and 18,054 users of other SSRIs.
  • In the propensity-matched cohort of 3,796 patients (1,898 per group), the unadjusted incidence of dementia was 7.5% for paroxetine users and 8.6% for other SSRI users; there were 306 incident dementia cases.
  • The robust Cox proportional hazards model showed no significant difference in dementia risk: HR=.99, 95% CI=.79–1.23, p=.896.
  • Findings remained nonsignificant in sensitivity analyses: first sensitivity analysis HR=.98, 95% CI=.79–1.22, p=.862; second sensitivity analysis HR=1.18, 95% CI=.84–1.66, p=.337.

Methods

  • Retrospective cohort study using 2007–2010 Minimum Data Set–linked Medicare data, including elderly nursing home patients age 65 or older with depression who were new users of SSRIs between January 1, 2008, and December 31, 2008, without baseline dementia.
  • Patients were followed for a maximum of two years after index SSRI use; exposure was classified as paroxetine versus other SSRIs (sertraline, citalopram, fluoxetine, fluvoxamine, escitalopram).
  • Propensity score matching used more than 70 covariates and a GREEDY 5→1 technique; dementia risk was modeled with a robust Cox proportional hazards model to account for clustering within matched pairs, with additional sensitivity analyses.

Limitations

  • Stated in the paper: disease and outcome measurements relied on diagnostic claims data; pharmacy claims captured dispensing but not actual use; medications in Part A bundled payments for short postacute nursing home stays were not captured; Medicare secondary data may have miscoding and undercoding; unmeasured factors such as apolipoprotein E-e4, other genetic factors, diet, physical activity, stress, smoking, and alcohol consumption were unavailable; propensity score approaches control only for observed confounders, so unobserved confounding may affect findings.
  • Evident from the text: the study is observational and residual confounding cannot be excluded; dementia ascertainment via claims/MDS may misclassify cases; follow-up was limited to a maximum of two years; the cohort was restricted to fee-for-service Medicare nursing home residents, which may limit generalizability.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1176/appi.ps.201500011

Cites

65 of 65 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Verification

Claims the paper makes

14 of 41 cited sources checked · 8 supported · 0 flagged · accuracy not yet measured

Show all 29 claims

  • Probably not a substantial claim. 21
  • It may state two separate claims as one. 8
25 of 25
  • The paper relies on this without support.

    No previous studies have examined paroxetine use and the risk of dementia among elderly patients with depression, especially in nursing homes.

    “None of the previous studies have examined paroxetine use and the risk of dementia among elderly patients with depression, especially in nursing homes.”
  • The paper relies on this without support.

    This is the first study to establish that paroxetine does not increase the risk of dementia among elderly nursing home residents with depression compared with other SSRIs.

    “This is the first study, to our knowledge, to establish that paroxetine, although highly anticholinergic, does not increase the risk of dementia among elderly nursing home residents with depression compared with other SSRIs.”
  • The paper relies on this without support.

    Propensity score matching adequately controls for confounding, including unmeasured confounders, so that the matched groups differ only on treatment assignment.

    “Propensity score matching is commonly used to minimize pretreatment differences between two groups such that the matched groups differ only on treatment assignment.”
  • The paper relies on this without support.

    Propensity score approaches control only for observed confounders.

    “approaches control only for observed confounders.”
  • The paper relies on this without support.

    Paroxetine has stronger anticholinergic properties compared with other SSRIs.

    “Although paroxetine has stronger anticholinergic properties compared with other SSRIs”
5 of 5

Self-check

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

  • Glaucoma percentage is too high for the reported count

    Minor

    Both paroxetine columns report 393 patients with glaucoma as 24%; among 1,898 patients, that is about 20.7%, or 21% to the nearest whole percent.

    Reported 24 · recomputed 20.706006

  • Insomnia percentage is too high for the reported count

    Minor

    Both paroxetine columns list 50 patients with insomnia as 4% of 1,898; the percentage is about 2.6%, or 3% to the nearest whole percent.

    Reported 4 · recomputed 2.634352

  • Matched drug-dependence-agent percentage is understated

    Minor

    The matched columns report 11 users as .1% of each 1,898-person group. Eleven of 1,898 is about .58%, not .1%.

    Reported 0.1 · recomputed 0.579557

3 of 3

Citations

Cites

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Show all 59 references

Research works printed but not linked: 1

  1. 2011, SAS 9.3 Guide to Software Updates

Cited by

Sorted by citations

See all 23

Metadata

Authors
Bali, V., Chatterjee, S., Carnahan, R. M., Chen, H., Johnson, M. L., & Aparasu, R. R.
Affiliations
University of Iowa (US)
Venue
Psychiatric Services
Published
2015-12-01
Volume
66
Issue
12
Pages
1333-1340
ISSN
  • 0022-1597 (ISSN-L)
  • 1075-2730
  • 1557-9700
OpenAlex
W1896306650
Cited by
23
References
59
Citations by year
2025: 2 · 2024: 1 · 2023: 2 · 2022: 1 · 2021: 3 · 2020: 2 · 2019: 2 · 2018: 3 · 2017: 3 · 2016: 3 · 2015: 1
FWCI
2.26
Type
journal article
Language
en
Open access
Locations
  • Psychiatric Services (publishedVersion)
  • PubMed (publishedVersion)
Funders
Agency for Healthcare Research and Quality (R01HS021264)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Pharmacology (medical) › Treatment of Major Depression
  • Health Sciences › Medicine › Geriatrics and Gerontology › Pharmaceutical Practices and Patient Outcomes
Keywords
paroxetine, selective serotonin reuptake inhibitors, dementia risk, nursing home residents, elderly patients, depression, anticholinergic effects, cognitive outcomes, antidepressant side effects
MeSH terms
Aged, Aged, 80 and over, Dementia, Depressive Disorder, Female, Homes for the Aged, Humans, Male, Nursing Homes, Retrospective Studies, Risk, United States, Cohort Studies, Comorbidity, Causality, Proportional Hazards Models, Selective Serotonin Reuptake Inhibitors, Paroxetine

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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.

A language model drew the claims from the paper on 2026-11-07, under version 3 of the claim definition (model deepseek-v4.1-flash, prompt extract-v3).

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Cited sources are checked with a language model’s help (gpt-6-sol).

Statistics and arithmetic are recomputed, not judged.

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