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Published in: BMC Geriatrics 1/2019

Open Access 01-12-2019 | Insomnia | Research article

Sleep disorders among educationally active elderly people in Bialystok, Poland: a cross-sectional study

Authors: Mateusz Cybulski, Lukasz Cybulski, Elzbieta Krajewska-Kulak, Magda Orzechowska, Urszula Cwalina, Krystyna Kowalczuk

Published in: BMC Geriatrics | Issue 1/2019

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Abstract

Background

Sleep disorders in an ageing society constitute a significant public health problem. It is estimated that approximately 50% of people aged 55 years and older have trouble sleeping, including initiating and maintaining sleep.
The aim of this study was to determine the prevalence of sleep disorders in a group of educationally active elderly people living in Bialystok, Poland.

Methods

The study included a total of 182 people – residents of Bialystok – aged 60 or older; 146 women (80.22%) and 36 men (19.78%). The study used three standardized psychometric scales: The Athens Insomnia Scale (AIS), The Epworth Sleepiness Scale (ESS) and The Insomnia Severity Index (ISI).

Results

More than half of the respondents scored 6 or more points on the AIS, which is considered a value that indicates a high probability of insomnia symptom occurrence. A similar percentage of respondents obtained a point value on the ISI indicating the presence of insomnia. The vast majority of respondents scored below 11 points on the ESS, which means no symptoms of excessive sleepiness. There was a significant correlation between the results of the above scales in the examined group in total and also by sex.

Conclusions

Sleep disorders, particularly insomnia, constitute a significant social and health problem in the group of educationally active elderly people living in Bialystok. In light of the obtained study results, it is recommended to conduct and improve existing health education programs aimed at the elderly regarding sleep disorders to improve the quality of their sleep, and thus quality of life, and raise the awareness of the elderly about the importance of sleep in everyday life. There is a need for further research in the field of sleep disorders in the elderly to determine the prevalence of these disorders on a national scale.
Literature
1.
go back to reference Phillips B, Ancoli-Israel S. Sleep disorders in the elderly. Sleep Med. 2001;2:99–114.CrossRef Phillips B, Ancoli-Israel S. Sleep disorders in the elderly. Sleep Med. 2001;2:99–114.CrossRef
2.
go back to reference Rodriguez JC, Dzierzewski JM, Alessi CA. Sleep problems in the elderly. Med Clin North Am. 2015;99:431–9.CrossRef Rodriguez JC, Dzierzewski JM, Alessi CA. Sleep problems in the elderly. Med Clin North Am. 2015;99:431–9.CrossRef
3.
go back to reference Ancoli-Israel S, Ayalon L. Diagnosis and treatment of sleep disorders in older adults. Am J Geriatr Psychiatry. 2006;14:95–103.CrossRef Ancoli-Israel S, Ayalon L. Diagnosis and treatment of sleep disorders in older adults. Am J Geriatr Psychiatry. 2006;14:95–103.CrossRef
4.
go back to reference Crowley K. Sleep and sleep disorders in older adults. Neuropsychol Rev. 2011;21:41–53.CrossRef Crowley K. Sleep and sleep disorders in older adults. Neuropsychol Rev. 2011;21:41–53.CrossRef
5.
go back to reference Foley D, Ancoli-Israel S, Britz P, Walsh J. Sleep disturbances and chronic disease in older adults: results of the 2003 National Sleep Foundation sleep in America survey. J Psychosom Res. 2004;56:497–502.CrossRef Foley D, Ancoli-Israel S, Britz P, Walsh J. Sleep disturbances and chronic disease in older adults: results of the 2003 National Sleep Foundation sleep in America survey. J Psychosom Res. 2004;56:497–502.CrossRef
6.
go back to reference Prinz PN. Sleep and sleep disorders in older adults. J Clin Neurophysiol. 1995;12:139–46.CrossRef Prinz PN. Sleep and sleep disorders in older adults. J Clin Neurophysiol. 1995;12:139–46.CrossRef
7.
go back to reference Van Cauter E, Leproult R, Plat L. Age-related changes in slow wave sleep and REM sleep and relationship with growth hormone and cortisol in healthy men. JAMA. 2000;284:861–8.CrossRef Van Cauter E, Leproult R, Plat L. Age-related changes in slow wave sleep and REM sleep and relationship with growth hormone and cortisol in healthy men. JAMA. 2000;284:861–8.CrossRef
8.
go back to reference McCrae CS, Rowe MA, Tierney CG, Dautovich ND, Definis AL, McNamara JP. Sleep complaints, subjective and objective sleep patterns, health, psychological adjustment, and daytime functioning in community-dwelling older adults. J Gerontol B Psychol Sci Soc Sci. 2005;60:182–9.CrossRef McCrae CS, Rowe MA, Tierney CG, Dautovich ND, Definis AL, McNamara JP. Sleep complaints, subjective and objective sleep patterns, health, psychological adjustment, and daytime functioning in community-dwelling older adults. J Gerontol B Psychol Sci Soc Sci. 2005;60:182–9.CrossRef
9.
go back to reference Sariarslan HA, Gulhan YB, Unalan D, Basturk M, Delibas S. The relationship of sleep problems to life quality and depression. Neurosciences. 2015;20:236–42.CrossRef Sariarslan HA, Gulhan YB, Unalan D, Basturk M, Delibas S. The relationship of sleep problems to life quality and depression. Neurosciences. 2015;20:236–42.CrossRef
10.
go back to reference Cho HJ, Lavretsky H, Olmstead R, Levin MJ, Oxman MN, Irwin MR. Sleep disturbance and depression recurrence in community-dwelling older adults: a prospective study. Am J Psychiatry. 2008;165:1543–50.CrossRef Cho HJ, Lavretsky H, Olmstead R, Levin MJ, Oxman MN, Irwin MR. Sleep disturbance and depression recurrence in community-dwelling older adults: a prospective study. Am J Psychiatry. 2008;165:1543–50.CrossRef
11.
go back to reference Cole MG, Dendukuri N. Risk factors for depression among elderly community subjects: a systematic review and meta-analysis. Am J Psychiatry. 2003;160:1147–56.CrossRef Cole MG, Dendukuri N. Risk factors for depression among elderly community subjects: a systematic review and meta-analysis. Am J Psychiatry. 2003;160:1147–56.CrossRef
12.
go back to reference Foley DJ, Monjan AA, Brown SL, Simonsick EM, Wallace RB, Blazer DG. Sleep complaints among elderly persons: an epidemiologic study of three communities. Sleep. 1995;18:425–32.CrossRef Foley DJ, Monjan AA, Brown SL, Simonsick EM, Wallace RB, Blazer DG. Sleep complaints among elderly persons: an epidemiologic study of three communities. Sleep. 1995;18:425–32.CrossRef
13.
go back to reference Liu X, Liu L. Sleep habits and insomnia in a sample of elderly persons in China. Sleep. 2005;28:1579–87.PubMed Liu X, Liu L. Sleep habits and insomnia in a sample of elderly persons in China. Sleep. 2005;28:1579–87.PubMed
14.
go back to reference Maggi S, Langlois JA, Minicuci N, Grigoletto F, Pavan M, Foley DJ, Enzi G. Sleep complaints in community-dwelling older persons: prevalence, associated factors, and reported causes. J Am Geriatr Soc. 1998;46:161–8.CrossRef Maggi S, Langlois JA, Minicuci N, Grigoletto F, Pavan M, Foley DJ, Enzi G. Sleep complaints in community-dwelling older persons: prevalence, associated factors, and reported causes. J Am Geriatr Soc. 1998;46:161–8.CrossRef
15.
go back to reference Ohayon MM, Zulley J, Guilleminault C, Smirne S, Priest RG. How age and daytime activities are related to insomnia in the general population: consequences for older people. J Am Geriatr Soc. 2001;49:360–6.CrossRef Ohayon MM, Zulley J, Guilleminault C, Smirne S, Priest RG. How age and daytime activities are related to insomnia in the general population: consequences for older people. J Am Geriatr Soc. 2001;49:360–6.CrossRef
16.
go back to reference Rongve A, Boeve BF, Aarsland D. Correlates of caregiver-reported sleep disturbances in a sample of persons with early dementia. J Am Geriatr Soc. 2010;58:480–6.CrossRef Rongve A, Boeve BF, Aarsland D. Correlates of caregiver-reported sleep disturbances in a sample of persons with early dementia. J Am Geriatr Soc. 2010;58:480–6.CrossRef
17.
go back to reference Chen YS. Association between chronic insomnia and depression in elderly adults. J Chin Med Assoc. 2012;75:195–6.CrossRef Chen YS. Association between chronic insomnia and depression in elderly adults. J Chin Med Assoc. 2012;75:195–6.CrossRef
18.
go back to reference Nowicki Z, Grabowski K, Cubała WJ, Nowicka-Sauer K, Zdrojewski T, Rutkowski M, Bandosz P. Prevalence of self-reported insomnia in general population of Poland. Psychiatr Pol. 2016;50:165–73.CrossRef Nowicki Z, Grabowski K, Cubała WJ, Nowicka-Sauer K, Zdrojewski T, Rutkowski M, Bandosz P. Prevalence of self-reported insomnia in general population of Poland. Psychiatr Pol. 2016;50:165–73.CrossRef
19.
go back to reference Wojtas A, Ciszewski S. Epidemiology of insomnia. Psychiatry. 2011;8:79–83. Wojtas A, Ciszewski S. Epidemiology of insomnia. Psychiatry. 2011;8:79–83.
20.
go back to reference Ayalon L, Ancoli-Israel S. Normal sleep in aging. In: Lee-Chiong TL, editor. Sleep: a comprehensive handbook. Hoboken: Wiley; 2005. p. 599–603. Ayalon L, Ancoli-Israel S. Normal sleep in aging. In: Lee-Chiong TL, editor. Sleep: a comprehensive handbook. Hoboken: Wiley; 2005. p. 599–603.
21.
go back to reference Zarcone VPJ. Sleep hygiene. In: Kryger MH, Roth T, Dement WC, editors. Principles and practice of sleep medicine. Philadelphia: WB Saunders; 2000. p. 657–61. Zarcone VPJ. Sleep hygiene. In: Kryger MH, Roth T, Dement WC, editors. Principles and practice of sleep medicine. Philadelphia: WB Saunders; 2000. p. 657–61.
22.
go back to reference Hellström A, Hellström P, Willman A, Fagerström C. Association between sleep disturbances and leisure activities in the elderly: a comparison between men and women. Sleep Disord. 2014;2014:595208.PubMedPubMedCentral Hellström A, Hellström P, Willman A, Fagerström C. Association between sleep disturbances and leisure activities in the elderly: a comparison between men and women. Sleep Disord. 2014;2014:595208.PubMedPubMedCentral
23.
go back to reference Faubel R, Lopez-Garcia E, Guallar-Castillón P, Balboa-Castillo T, Gutiérrez-Fisac JL, Banegas JR, Rodríguez-Artalejo F. Sleep duration and health-related quality of life among older adults: a population-based cohort in Spain. Sleep. 2009;32:1059–68.PubMedPubMedCentral Faubel R, Lopez-Garcia E, Guallar-Castillón P, Balboa-Castillo T, Gutiérrez-Fisac JL, Banegas JR, Rodríguez-Artalejo F. Sleep duration and health-related quality of life among older adults: a population-based cohort in Spain. Sleep. 2009;32:1059–68.PubMedPubMedCentral
24.
25.
go back to reference Irwin MR, Olmstead R, Motivala SJ. Improving sleep quality in older adults with moderate sleep complaints: a randomized controlled trial of tai chi Chih. Sleep. 2008;31:1001–8.PubMedPubMedCentral Irwin MR, Olmstead R, Motivala SJ. Improving sleep quality in older adults with moderate sleep complaints: a randomized controlled trial of tai chi Chih. Sleep. 2008;31:1001–8.PubMedPubMedCentral
26.
go back to reference Li F, Fisher KJ, Harmer P, Irbe D, Tearse RG, Weimer C. Tai chi and self-rated quality of sleep and daytime sleepiness in older adults: a randomized controlled trial. J Am Geriatr Soc. 2004;52:892–900.CrossRef Li F, Fisher KJ, Harmer P, Irbe D, Tearse RG, Weimer C. Tai chi and self-rated quality of sleep and daytime sleepiness in older adults: a randomized controlled trial. J Am Geriatr Soc. 2004;52:892–900.CrossRef
27.
go back to reference Soldatos CR, Dikeos DG, Paparrigopoulos TJ. Athens insomnia scale: validation of an instrument based on ICD-10 criteria. J Psychosom Res. 2000;48:555–60.CrossRef Soldatos CR, Dikeos DG, Paparrigopoulos TJ. Athens insomnia scale: validation of an instrument based on ICD-10 criteria. J Psychosom Res. 2000;48:555–60.CrossRef
28.
go back to reference Soldatos CR, Dikeos DG, Paparrigopoulos TJ. The diagnostic validity of the Athens insomnia scale. J Psychosom Res. 2003;55:263–7.CrossRef Soldatos CR, Dikeos DG, Paparrigopoulos TJ. The diagnostic validity of the Athens insomnia scale. J Psychosom Res. 2003;55:263–7.CrossRef
30.
go back to reference Fornal-Pawłowska M, Wołyńczyk-Gmaj D, Szelenberger W. Validation of the polish version of the Athens insomnia scale. Psychiatr Pol. 2011;45:211–21.PubMed Fornal-Pawłowska M, Wołyńczyk-Gmaj D, Szelenberger W. Validation of the polish version of the Athens insomnia scale. Psychiatr Pol. 2011;45:211–21.PubMed
31.
go back to reference Morin CM. Measuring outcomes in randomized clinical trials of insomnia treatments. Sleep Med Rev. 2003;7:263–79.CrossRef Morin CM. Measuring outcomes in randomized clinical trials of insomnia treatments. Sleep Med Rev. 2003;7:263–79.CrossRef
32.
go back to reference Buysse DJ, Ancoli-Israel S, Edinger JD, Lichstein KL, Morin CM. Recommendations for standard research assessment of insomnia. Sleep. 2006;29:1155–73.CrossRef Buysse DJ, Ancoli-Israel S, Edinger JD, Lichstein KL, Morin CM. Recommendations for standard research assessment of insomnia. Sleep. 2006;29:1155–73.CrossRef
33.
go back to reference Johns MW. Sleepiness in different situations measured by the Epworth sleepiness scale. Sleep. 1994;17:703–10.CrossRef Johns MW. Sleepiness in different situations measured by the Epworth sleepiness scale. Sleep. 1994;17:703–10.CrossRef
34.
go back to reference Hagell P, Broman JE. Measurement properties and hierarchical item structure of the Epworth sleepiness scale in Parkinson's disease. J Sleep Res. 2007;16:102–9.CrossRef Hagell P, Broman JE. Measurement properties and hierarchical item structure of the Epworth sleepiness scale in Parkinson's disease. J Sleep Res. 2007;16:102–9.CrossRef
35.
go back to reference Bastien CH, Vallières A, Morin CM. Validation of the insomnia severity index as an outcome measure for insomnia research. Sleep Med. 2001;2:297–307.CrossRef Bastien CH, Vallières A, Morin CM. Validation of the insomnia severity index as an outcome measure for insomnia research. Sleep Med. 2001;2:297–307.CrossRef
36.
go back to reference Smith MT, Wegener ST. Measures of sleep: the insomnia severity index, medical outcomes study (MOS) sleep scale, Pittsburgh sleep diary (PSD), and Pittsburgh sleep quality index (PSQI). Arthritis Rheum. 2003;49(Suppl 5):S184–96.CrossRef Smith MT, Wegener ST. Measures of sleep: the insomnia severity index, medical outcomes study (MOS) sleep scale, Pittsburgh sleep diary (PSD), and Pittsburgh sleep quality index (PSQI). Arthritis Rheum. 2003;49(Suppl 5):S184–96.CrossRef
37.
go back to reference Kim KW, Kang SH, Yoon IY, Lee SD, Ju G, Han JW, Kim TH, Lee CS, Kim T. Prevalence and clinical characteristics of insomnia and its subtypes in the Korean elderly. Arch Gerontol Geriatr. 2017;68:68–75.CrossRef Kim KW, Kang SH, Yoon IY, Lee SD, Ju G, Han JW, Kim TH, Lee CS, Kim T. Prevalence and clinical characteristics of insomnia and its subtypes in the Korean elderly. Arch Gerontol Geriatr. 2017;68:68–75.CrossRef
38.
go back to reference Ibáñez-Del Valle V, Silva J, Castelló-Domenech AB, Martinez-Martinez M, Verdejo Y, Sanantonio-Camps L, Cauli O. Subjective and objective sleep quality in elderly individuals: the role of psychogeriatric evaluation. Arch Gerontol Geriatr. 2018;76:221–6.CrossRef Ibáñez-Del Valle V, Silva J, Castelló-Domenech AB, Martinez-Martinez M, Verdejo Y, Sanantonio-Camps L, Cauli O. Subjective and objective sleep quality in elderly individuals: the role of psychogeriatric evaluation. Arch Gerontol Geriatr. 2018;76:221–6.CrossRef
39.
go back to reference Abd Allah ES, Abdel-Aziz HR, Abo El-Seoud AR. Insomnia: prevalence, risk factors, and its effect on quality of life among elderly in Zagazig City, Egypt. J Nurs Educ Pract. 2014;4:52–69. Abd Allah ES, Abdel-Aziz HR, Abo El-Seoud AR. Insomnia: prevalence, risk factors, and its effect on quality of life among elderly in Zagazig City, Egypt. J Nurs Educ Pract. 2014;4:52–69.
40.
go back to reference Hishikawa N, Fukui Y, Sato K, Ohta Y, Yamashita T, Abe K. Cognitive and affective functions associated with insomnia: a population-based study. Neurol Res. 2017;39:331–6.CrossRef Hishikawa N, Fukui Y, Sato K, Ohta Y, Yamashita T, Abe K. Cognitive and affective functions associated with insomnia: a population-based study. Neurol Res. 2017;39:331–6.CrossRef
41.
go back to reference Paparrigopoulos T, Tzavara C, Theleritis C, Psarros C, Soldatos C, Tountas Y. Insomnia and its correlates in a representative sample of the Greek population. BMC Public Health. 2010;10:531.CrossRef Paparrigopoulos T, Tzavara C, Theleritis C, Psarros C, Soldatos C, Tountas Y. Insomnia and its correlates in a representative sample of the Greek population. BMC Public Health. 2010;10:531.CrossRef
42.
go back to reference Voyer P, Verreault R, Mengue PN, Morin CM. Prevalence of insomnia and its associated factors in elderly long-term care residents. Arch Gerontol Geriatr. 2006;42:1–20.CrossRef Voyer P, Verreault R, Mengue PN, Morin CM. Prevalence of insomnia and its associated factors in elderly long-term care residents. Arch Gerontol Geriatr. 2006;42:1–20.CrossRef
43.
go back to reference Brandão GS, Gomes GSBF, Brandão GS, Callou Sampaio AA, Donner CF, Oliveira LVF, Camelier AA. Home exercise improves the quality of sleep and daytime sleepiness of elderlies: a randomized controlled trial. Multidiscip Respir Med. 2018;13:2.CrossRef Brandão GS, Gomes GSBF, Brandão GS, Callou Sampaio AA, Donner CF, Oliveira LVF, Camelier AA. Home exercise improves the quality of sleep and daytime sleepiness of elderlies: a randomized controlled trial. Multidiscip Respir Med. 2018;13:2.CrossRef
44.
go back to reference Brandão GS, Camelier FWR, Sampaio AAC, Brandão GS, Silva AS, Gomes GSBF, Donner CF, Oliveira LVF, Camelier AA. Association of sleep quality with excessive daytime somnolence and quality of life of elderlies of community. Multidiscip Respir Med. 2018;13:8.CrossRef Brandão GS, Camelier FWR, Sampaio AAC, Brandão GS, Silva AS, Gomes GSBF, Donner CF, Oliveira LVF, Camelier AA. Association of sleep quality with excessive daytime somnolence and quality of life of elderlies of community. Multidiscip Respir Med. 2018;13:8.CrossRef
45.
go back to reference Uchmanowicz I, Markiewicz K, Uchmanowicz B, Kołtuniuk A, Rosińczuk J. The relationship between sleep disturbances and quality of life in elderly patients with hypertension. Clin Interv Aging. 2019;14:155–65.CrossRef Uchmanowicz I, Markiewicz K, Uchmanowicz B, Kołtuniuk A, Rosińczuk J. The relationship between sleep disturbances and quality of life in elderly patients with hypertension. Clin Interv Aging. 2019;14:155–65.CrossRef
46.
go back to reference Martin JL, Ancoli-Israel S. Napping in older adults. Sleep Med Clin. 2006;1:177–86.CrossRef Martin JL, Ancoli-Israel S. Napping in older adults. Sleep Med Clin. 2006;1:177–86.CrossRef
47.
go back to reference Tsuno N, Jaussent I, Dauvilliers Y, Touchon J, Ritchie K, Besset A. Determinants of excessive daytime sleepiness in a French community-dwelling elderly population. J Sleep Res. 2007;16:364–71.CrossRef Tsuno N, Jaussent I, Dauvilliers Y, Touchon J, Ritchie K, Besset A. Determinants of excessive daytime sleepiness in a French community-dwelling elderly population. J Sleep Res. 2007;16:364–71.CrossRef
48.
go back to reference Sforza E, Celle S, Saint-Martin M, Barthélémy JC, Roche F. Hippocampus volume and subjective sleepiness in older people with sleep-disordered breathing: a preliminary report. J Sleep Res. 2016;25:190–3.CrossRef Sforza E, Celle S, Saint-Martin M, Barthélémy JC, Roche F. Hippocampus volume and subjective sleepiness in older people with sleep-disordered breathing: a preliminary report. J Sleep Res. 2016;25:190–3.CrossRef
49.
go back to reference Asplund R. Nocturia: consequences for sleep and daytime activities and associated risks. Eur Urol Suppl. 2005;3:24–32.CrossRef Asplund R. Nocturia: consequences for sleep and daytime activities and associated risks. Eur Urol Suppl. 2005;3:24–32.CrossRef
50.
go back to reference Sakamoto R, Okumiya K, Norboo T, Tsering N, Yamaguchi T, Nose M, Takeda S, Tsukihara T, Ishikawa M, Nakajima S, Wada T, Fujisawa M, Imai H, Ishimoto Y, Kimura Y, Fukutomi E, Chen W, Otsuka K, Matsubayashi K. Sleep quality among elderly high-altitude dwellers in Ladakh. Psychiatry Res. 2017;249:51–7.CrossRef Sakamoto R, Okumiya K, Norboo T, Tsering N, Yamaguchi T, Nose M, Takeda S, Tsukihara T, Ishikawa M, Nakajima S, Wada T, Fujisawa M, Imai H, Ishimoto Y, Kimura Y, Fukutomi E, Chen W, Otsuka K, Matsubayashi K. Sleep quality among elderly high-altitude dwellers in Ladakh. Psychiatry Res. 2017;249:51–7.CrossRef
51.
go back to reference Ayoub AI, Attia M, El Kady HM, Ashour A. Insomnia among community dwelling elderly in Alexandria, Egypt. J Egypt Public Health Assoc. 2014;89:136–42.CrossRef Ayoub AI, Attia M, El Kady HM, Ashour A. Insomnia among community dwelling elderly in Alexandria, Egypt. J Egypt Public Health Assoc. 2014;89:136–42.CrossRef
52.
go back to reference Yu DS. Insomnia severity index: psychometric properties with Chinese community-dwelling older people. J Adv Nurs. 2010;66(10):2350–9.CrossRef Yu DS. Insomnia severity index: psychometric properties with Chinese community-dwelling older people. J Adv Nurs. 2010;66(10):2350–9.CrossRef
53.
go back to reference Dragioti E, Levin LÅ, Bernfort L, Larsson B, Gerdle B. Insomnia severity and its relationship with demographics, pain features, anxiety, and depression in older adults with and without pain: cross-sectional population-based results from the PainS65+ cohort. Ann General Psychiatry. 2017;16:15.CrossRef Dragioti E, Levin LÅ, Bernfort L, Larsson B, Gerdle B. Insomnia severity and its relationship with demographics, pain features, anxiety, and depression in older adults with and without pain: cross-sectional population-based results from the PainS65+ cohort. Ann General Psychiatry. 2017;16:15.CrossRef
54.
go back to reference Pigeon WR, Carr M, Gorman C, Perlis ML. Effects of a tart cherry juice beverage on the sleep of older adults with insomnia: a pilot study. J Med Food. 2010;13:579–83.CrossRef Pigeon WR, Carr M, Gorman C, Perlis ML. Effects of a tart cherry juice beverage on the sleep of older adults with insomnia: a pilot study. J Med Food. 2010;13:579–83.CrossRef
55.
go back to reference Tamura N, Tanaka H. Effects of sleep management with self-help treatment for the Japanese elderly with chronic insomnia: a quasi-experimental study. J Behav Med. 2017;40:659–68.CrossRef Tamura N, Tanaka H. Effects of sleep management with self-help treatment for the Japanese elderly with chronic insomnia: a quasi-experimental study. J Behav Med. 2017;40:659–68.CrossRef
Metadata
Title
Sleep disorders among educationally active elderly people in Bialystok, Poland: a cross-sectional study
Authors
Mateusz Cybulski
Lukasz Cybulski
Elzbieta Krajewska-Kulak
Magda Orzechowska
Urszula Cwalina
Krystyna Kowalczuk
Publication date
01-12-2019
Publisher
BioMed Central
Keyword
Insomnia
Published in
BMC Geriatrics / Issue 1/2019
Electronic ISSN: 1471-2318
DOI
https://doi.org/10.1186/s12877-019-1248-2

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