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Prevalence and correlates for sleep complaints in older adults in low and middle income countries: a 10/66 Dementia Research Group study
Mazzotti DR, Guindalini C, Sosa AL, Ferri CP, Tufik S.. Sleep medicine, 2012-04-12
Topic: Risk, prevention and care in population studies
Plain-language summary
Background Although it is well recognized that the prevalence of sleep complaints increases with age, estimates in developing countries are still unknown. The present study aims to estimate the prevalence and prevalence ratios of the correlates of sleep complaints in a large population of older adults from low and middle income countries (LAMICs). Methods A cross-sectional survey was performed in 16,680 65 year-old or older residents in catchment areas of Cuba, the Dominican Republic, Peru, Venezuela, Mexico, China, India, and Puerto Rico (10/66 Dementia Research Group study). Information about socio-demographic factors, lifestyle, health, and sleep complaints was obtained. Results were standardized by age, sex, household clustering, and residence site (urban or rural). Prevalence ratios were derived for each country and fixed effects meta-analyses were used to combine them. Results The standardized prevalence of sleep complaints varied from 9.1% (China) to 37.7% (India). The meta-analysis showed that female gender, urban residence, low educational level, low physical activity status, high pain scores, poor health, higher memory impairment score, presence of major depression, mild cognitive impairment, and high number of co-morbidities were associated with sleep complaints. Conclusions This study robustly characterized the prevalence of sleep complaints in large samples of the elderly in LAMICs and identified potential risk factors that may be specific to these populations. This approach can help to direct health-care efforts related to sleep disturbances in these countries.
What this study adds
Evidence grade: High
This is a pooled review. This study estimated the prevalence of sleep complaints in older adults across low and middle income countries and found several factors associated with them, including memory impairment and mild cognitive impairment. Reported effect size: 9.1%; 37.7%.
Taken from this record’s own fields, not from reading the paper. The grade is assigned from the abstract’s wording; what that means.
Cite this study APA, Vancouver, BibTeX · download .bib or .ris
APA 7th
Mazzotti, D. R., Guindalini, C., Sosa, A. L., Ferri, C. P., & Tufik, S. (2012). Prevalence and correlates for sleep complaints in older adults in low and middle income countries: a 10/66 Dementia Research Group study. Sleep medicine. https://doi.org/10.1016/j.sleep.2012.02.009
Vancouver
Mazzotti DR, Guindalini C, Sosa AL, Ferri CP, Tufik S. Prevalence and correlates for sleep complaints in older adults in low and middle income countries: a 10/66 Dementia Research Group study. Sleep medicine. 2012. doi:10.1016/j.sleep.2012.02.009. PMID: 22503944.
BibTeX
@article{mazzotti2012-22503944,
author = {Mazzotti, D. R. and Guindalini, C. and Sosa, A. L. and Ferri, C. P. and Tufik, S.},
title = {{Prevalence and correlates for sleep complaints in older adults in low and middle income countries: a 10/66 Dementia Research Group study}},
journal = {Sleep medicine},
year = {2012},
doi = {10.1016/j.sleep.2012.02.009},
pmid = {22503944},
url = {https://doi.org/10.1016/j.sleep.2012.02.009}
}
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Key findings
- Results were standardized by age, sex, household clustering, and residence site (urban or rural).
- Results The standardized prevalence of sleep complaints varied from 9.1% (China) to 37.7% (India).
- The meta-analysis showed that female gender, urban residence, low educational level, low physical activity status, high pain scores, poor health, higher memory impairment score, presence of major depression, mild cognitive impairment, and high number of co-morbidities were associated with sleep complaints.
Why it matters
This study estimated the prevalence of sleep complaints in older adults across low and middle income countries and found several factors associated with them, including memory impairment and mild cognitive impairment. It does not test any treatment, cure or prevention for Alzheimer's disease.
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Study details
- Study designmeta-analysis
- Effect size9.1%; 37.7%
- Evidence strengthHigh
How this study scored 58/100
Published in a peer-reviewed journal, and it is a meta-analysis pooling many studies. Scored zero for sample size and studied in people because the record does not state it.
| Component | Points | Why |
|---|---|---|
| Journal tier | 7 / 10 | Tier 3 — peer-reviewed journal (Sleep medicine) |
| Journal's citation record | 2 / 4 | Sleep Medicine: journal h-index 193 (OpenAlex, 2026-10-29) |
| Study design | 12 / 12 | A meta-analysis pooling many studies |
| Strength of evidence | 5 / 5 | Rated “high” in our summary |
| Peer-review validation | 10 / 10 | Peer-reviewed. Published as an article in a named peer-reviewed journal. |
| How recent | 1 / 5 | 2012 — within 20 year(s) of the newest study here |
| Sample size | 0 / 4 | Participant count not stated — scores zero (not stated in the record — scored 0) |
| Effect reported | 2 / 3 | Effect reported as a number, without an interval or test |
| Studied in people | 0 / 3 | Not stated whether this was studied in people — scores zero (not stated in the record — scored 0) |
| Randomized / blinded | 0 / 2 | A review of other studies — randomization is not credited here |
| Times cited | 4 / 7 | Cited 94 times (OpenAlex, 2026-10-10) |
| Citations per year | 2 / 5 | 5.9 citations a year over 16 year(s) since 2012 |
| Impact for its field and year | 3 / 6 | Cited 7.0× the average for papers of its field and year (OpenAlex FWCI) |
| Cited by studies here | 1 / 6 | Cited by 2 other studies in this library |
| Still being cited | 1 / 4 | Cited 14 times in 2024–2026 (2026 still in progress; OpenAlex) |
| Senior author's track record | 3 / 4 | Last-listed author Sérgio Tufik: h-index 61 (OpenAlex, whole career) |
| Institution's track record | 1 / 3 | King's College London: institution h-index 1,348 (OpenAlex) |
| Multicenter collaboration | 2 / 3 | OpenAlex lists 4 institution(s) in 3 countries |
| Indexed in PubMed | 2 / 2 | Indexed in PubMed (PMID 22503944) |
| Free to read | 0 / 2 | Behind a paywall — scores zero |
| Total | 58 / 100 | — |
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