Khairan, Paramita;
Shirai, Kokoro;
Shobugawa, Yugo;
Cadar, Dorina;
Saito, Tami;
Kondo, Katsunori;
Sobue, Tomotaka;
(2022)
Pneumonia and subsequent risk of dementia: Evidence from the Japan Gerontological Evaluation Study.
International Journal of Geriatric Psychiatry
, 37
(11)
pp. 1-11.
10.1002/gps.5825.
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Abstract
BACKGROUND: Recently, several studies reported that pneumonia might increase the risk of cognitive decline and dementia due to increased frailty. OBJECTIVES: This study aims to examine the association between a history of pneumonia and subsequent dementia risk. METHODS: Participants were 9952 aged 65 years or older Japanese men and women from the Japan Gerontological Evaluation Study prospective cohort study, followed up from 2013 to 2019. Dementia was identified by public long-term care insurance registration. A history of pneumonia contracted 1 year before the baseline questionnaire in 2013. A cox regression model was used to calculate hazard ratios (HRs) and 95% confidence intervals (CIs) for dementia risk, adjusted for potential confounding variables. We conducted competing risk analyses using a cause-specific hazard model. RESULTS: During the follow-up period of 6 years, 939 persons developed dementia. There was no association between having a prior history of pneumonia with dementia risk (HR 1.20, 95% CI:0.81–1.78). However, we observed an increased risk of dementia in persons with pre-frailty and frailty; the multivariable HR (95% CI) was 1.75 (1.48–2.07) and 2.42 (2.00–2.93) for pre-frailty and frailty, respectively. When pneumonia and frailty were combined, the risk of dementia was the highest for the persons with a history of pneumonia and frailty; the multivariable HR (95% CI) was 2.30 (1.47–3.62). The multivariable HR (95% CI) for those without pneumonia with frailty was 1.95 (1.66–2.28). Meanwhile, the multivariable HR (95% CI) for those with pneumonia without frailty was 1.64 (0.68–3.99). CONCLUSION: Our findings imply that a prior history of pre-frailty and frailty with or without pneumonia, but not a history of pneumonia per se, was associated with an increased risk of dementia among population-based-cohort of older Japanese people.
| Type: | Article |
|---|---|
| Title: | Pneumonia and subsequent risk of dementia: Evidence from the Japan Gerontological Evaluation Study |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1002/gps.5825 |
| Publisher version: | https://doi.org/10.1002/gps.5825 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Dementia, pneumonia, frailty, cohort study, older population |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Epidemiology and Health > Behavioural Science and Health UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Epidemiology and Health UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10157934 |
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