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Published in: BMC Public Health 1/2014

Open Access 01-12-2014 | Research article

Midlife insomnia and subsequent mortality: the Hordaland health study

Authors: Børge Sivertsen, Ståle Pallesen, Nick Glozier, Bjørn Bjorvatn, Paula Salo, Grethe S Tell, Reidun Ursin, Simon Øverland

Published in: BMC Public Health | Issue 1/2014

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Abstract

Background

Previous research suggests a possible link between insomnia and mortality, but findings are mixed and well-controlled studies are lacking. The aim of the current study was to examine the effect of insomnia in middle age on all-cause mortality.

Methods

Using a cohort design with 13-15 years follow-up, mortality registry data were linked to health information obtained during 1997-99, as part of the community-based Hordaland Health Study (HUSK), in Western Norway. 6,236 participants aged 40–45 provided baseline information on self- reported insomnia using the Karolinska Sleep Questionnaire Scale (defined according to the 5th edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-V), sociodemographic factors, health behaviors, shift/night-work, obstructive sleep apnea symptoms, sleep duration, sleep medication use, anxiety, depression, as well as a range of somatic diagnoses and symptoms. Height, weight and blood pressure were measured. Information on mortality was obtained from the Norwegian Cause of Death Registry.

Results

Insomnia was reported by 5.6% (349/6236) at baseline and a significant predictor of all-cause-mortality (hazard ratio [HR] = 2.74 [95% CI:1.75-4.30]). Adjusting for all confounders did not attenuate the effect (HR = 3.34 [95% CI:1.67-6.69]). Stratifying by gender, the effect was especially strong in men (HR = 4.72 [95% CI:2.48-9.03]); but also significant in women (adjusted HR = 1.96 [95% CI:1.04-3.67]). The mortality risk among participants with both insomnia and short sleep duration (<6.5 hours) was particularly high, whereas insomnia in combination with normal/greater sleep duration was not associated with mortality.

Conclusions

Insomnia was associated with a three-fold risk of mortality over 13-15 years follow-up. The risk appeared even higher in males or when insomnia was combined with short sleep duration, although such unadjusted subgroup analyses should be interpreted with caution. Establishing prevention strategies and low-threshold interventions should consequently be a prioritized task for public health policy.
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Literature
1.
go back to reference Cappuccio FP, D'Elia L, Strazzullo P, Miller MA: Sleep duration and all-cause mortality: a systematic review and meta-analysis of prospective studies. Sleep. 2010, 33: 585-592.PubMedPubMedCentral Cappuccio FP, D'Elia L, Strazzullo P, Miller MA: Sleep duration and all-cause mortality: a systematic review and meta-analysis of prospective studies. Sleep. 2010, 33: 585-592.PubMedPubMedCentral
2.
go back to reference Gallicchio L, Kalesan B: Sleep duration and mortality: a systematic review and meta-analysis. J Sleep Res. 2009, 18: 148-158.CrossRefPubMed Gallicchio L, Kalesan B: Sleep duration and mortality: a systematic review and meta-analysis. J Sleep Res. 2009, 18: 148-158.CrossRefPubMed
3.
go back to reference Kurina LM, McClintock MK, Chen JH, Waite LJ, Thisted RA, Lauderdale DS: Sleep duration and all-cause mortality: a critical review of measurement and associations. Ann Epidemiol. 2013, 23: 361-370.CrossRefPubMedPubMedCentral Kurina LM, McClintock MK, Chen JH, Waite LJ, Thisted RA, Lauderdale DS: Sleep duration and all-cause mortality: a critical review of measurement and associations. Ann Epidemiol. 2013, 23: 361-370.CrossRefPubMedPubMedCentral
4.
go back to reference Finn L, Peppard P, Szklo-Coxe M, Young T: Chronic insomnia and all cause mortality in the Wisconsin Sleep Cohort Study. Sleep. 2010, 33: A204- Finn L, Peppard P, Szklo-Coxe M, Young T: Chronic insomnia and all cause mortality in the Wisconsin Sleep Cohort Study. Sleep. 2010, 33: A204-
5.
go back to reference Hublin C, Partinen M, Koskenvuo M, Kaprio J: Heritability and mortality risk of insomnia-related symptoms: a genetic epidemiologic study in a population-based twin cohort. Sleep. 2011, 34: 957-964.CrossRefPubMedPubMedCentral Hublin C, Partinen M, Koskenvuo M, Kaprio J: Heritability and mortality risk of insomnia-related symptoms: a genetic epidemiologic study in a population-based twin cohort. Sleep. 2011, 34: 957-964.CrossRefPubMedPubMedCentral
6.
go back to reference Mallon L, Broman JE, Hetta J: Sleep complaints predict coronary artery disease mortality in males: a 12-year follow-up study of a middle-aged Swedish population. J Intern Med. 2002, 251: 207-216.CrossRefPubMed Mallon L, Broman JE, Hetta J: Sleep complaints predict coronary artery disease mortality in males: a 12-year follow-up study of a middle-aged Swedish population. J Intern Med. 2002, 251: 207-216.CrossRefPubMed
7.
go back to reference Vgontzas AN, Liao D, Pejovic S, Calhoun S, Karataraki M, Basta M, Fernandez-Mendoza J, Bixler EO: Insomnia with short sleep duration and mortality: the Penn State cohort. Sleep. 2010, 33: 1159-1164.PubMedPubMedCentral Vgontzas AN, Liao D, Pejovic S, Calhoun S, Karataraki M, Basta M, Fernandez-Mendoza J, Bixler EO: Insomnia with short sleep duration and mortality: the Penn State cohort. Sleep. 2010, 33: 1159-1164.PubMedPubMedCentral
8.
go back to reference Pollak CP, Perlick D, Linsner JP, Wenston J, Hsieh F: Sleep problems in the community elderly as predictors of death and nursing home placement. J Community Health. 1990, 15: 123-135.CrossRefPubMed Pollak CP, Perlick D, Linsner JP, Wenston J, Hsieh F: Sleep problems in the community elderly as predictors of death and nursing home placement. J Community Health. 1990, 15: 123-135.CrossRefPubMed
9.
go back to reference Althuis MD, Fredman L, Langenberg PW, Magaziner J: The relationship between insomnia and mortality among community-dwelling older women. J Am Geriatr Soc. 1998, 46: 1270-1273.CrossRefPubMed Althuis MD, Fredman L, Langenberg PW, Magaziner J: The relationship between insomnia and mortality among community-dwelling older women. J Am Geriatr Soc. 1998, 46: 1270-1273.CrossRefPubMed
10.
go back to reference Brabbins CJ, Dewey ME, Copeland JRM, Davidson IA, Mcwilliam C, Saunders P, Sharma VK, Sullivan C: Insomnia in the Elderly - Prevalence, Gender Differences and Relationships with Morbidity and Mortality. Int J Geriatr Psychiatry. 1993, 8: 473-480.CrossRef Brabbins CJ, Dewey ME, Copeland JRM, Davidson IA, Mcwilliam C, Saunders P, Sharma VK, Sullivan C: Insomnia in the Elderly - Prevalence, Gender Differences and Relationships with Morbidity and Mortality. Int J Geriatr Psychiatry. 1993, 8: 473-480.CrossRef
11.
go back to reference Kojima M, Wakai K, Kawamura T, Tamakoshi A, Aoki R, Lin Y, Nakayama T, Horibe H, Aoki N, Ohno Y: Sleep patterns and total mortality: a 12-year follow-up study in Japan. J Epidemiol. 2000, 10: 87-93.CrossRefPubMed Kojima M, Wakai K, Kawamura T, Tamakoshi A, Aoki R, Lin Y, Nakayama T, Horibe H, Aoki N, Ohno Y: Sleep patterns and total mortality: a 12-year follow-up study in Japan. J Epidemiol. 2000, 10: 87-93.CrossRefPubMed
12.
go back to reference Lack LC, Prior K, Luszcz M: Does insomnia kill the elderly?. Sleep. 2006, 29: A240-A240. Lack LC, Prior K, Luszcz M: Does insomnia kill the elderly?. Sleep. 2006, 29: A240-A240.
13.
go back to reference Mallon L, Broman JE, Hetta J: Relationship between insomnia, depression, and mortality: a 12-year follow-up of older adults in the community. Int Psychogeriatr. 2000, 12: 295-306.CrossRefPubMed Mallon L, Broman JE, Hetta J: Relationship between insomnia, depression, and mortality: a 12-year follow-up of older adults in the community. Int Psychogeriatr. 2000, 12: 295-306.CrossRefPubMed
14.
go back to reference Phillips BA, Mannino D: Does insomnia kill?. Sleep. 2005, 28: A233-A233. Phillips BA, Mannino D: Does insomnia kill?. Sleep. 2005, 28: A233-A233.
15.
go back to reference Rod NH, Vahtera J, Westerlund H, Kivimaki M, Zins M, Goldberg M, Lange T: Sleep Disturbances and Cause-Specific Mortality: Results From the GAZEL Cohort Study. Am J Epidemiol. 2011, 173: 300-309.CrossRefPubMed Rod NH, Vahtera J, Westerlund H, Kivimaki M, Zins M, Goldberg M, Lange T: Sleep Disturbances and Cause-Specific Mortality: Results From the GAZEL Cohort Study. Am J Epidemiol. 2011, 173: 300-309.CrossRefPubMed
16.
go back to reference Rumble R, Morgan K: Hypnotics, sleep, and mortality in elderly people. J Am Geriatr Soc. 1992, 40: 787-791.CrossRefPubMed Rumble R, Morgan K: Hypnotics, sleep, and mortality in elderly people. J Am Geriatr Soc. 1992, 40: 787-791.CrossRefPubMed
17.
go back to reference Allen RP: Article reviewed: Mortality associated with sleep duration and insomnia. Sleep Med. 2002, 3: 373-375.CrossRefPubMed Allen RP: Article reviewed: Mortality associated with sleep duration and insomnia. Sleep Med. 2002, 3: 373-375.CrossRefPubMed
18.
go back to reference Kripke DF, Garfinkel L, Wingard DL, Klauber MR, Marler MR: Mortality associated with sleep duration and insomnia. Arch Gen Psychiatry. 2002, 59: 131-136.CrossRefPubMed Kripke DF, Garfinkel L, Wingard DL, Klauber MR, Marler MR: Mortality associated with sleep duration and insomnia. Arch Gen Psychiatry. 2002, 59: 131-136.CrossRefPubMed
19.
go back to reference Chen HC, Su TP, Chou P: A nine-year follow-up study of sleep patterns and mortality in community-dwelling older adults in Taiwan00. Sleep. 2013, 36: 1187-1198.PubMedPubMedCentral Chen HC, Su TP, Chou P: A nine-year follow-up study of sleep patterns and mortality in community-dwelling older adults in Taiwan00. Sleep. 2013, 36: 1187-1198.PubMedPubMedCentral
20.
go back to reference American Psychiatric Association: Diagnostic and Statistical Manual of Mental Disorders (Fifth ed.). 2013, Arlington, VA: American Psychiatric Publishing, 4 American Psychiatric Association: Diagnostic and Statistical Manual of Mental Disorders (Fifth ed.). 2013, Arlington, VA: American Psychiatric Publishing, 4
21.
go back to reference Sivertsen B, Overland S, Krokstad S, Mykletun A: Seasonal variations in sleep problems at latitude 63°-65° in Norway: The Nord-Trondelag Health Study, 1995-1997. Am J Epidemiol. 2011, 174: 147-153.CrossRefPubMed Sivertsen B, Overland S, Krokstad S, Mykletun A: Seasonal variations in sleep problems at latitude 63°-65° in Norway: The Nord-Trondelag Health Study, 1995-1997. Am J Epidemiol. 2011, 174: 147-153.CrossRefPubMed
22.
go back to reference Ursin R, Bjorvatn B, Holsten F: Sleep duration, subjective sleep need, and sleep habits of 40- to 45-year-olds in the Hordaland Health Study. Sleep. 2005, 28: 1260-1269.PubMed Ursin R, Bjorvatn B, Holsten F: Sleep duration, subjective sleep need, and sleep habits of 40- to 45-year-olds in the Hordaland Health Study. Sleep. 2005, 28: 1260-1269.PubMed
23.
go back to reference Kecklund G, Åkerstedt T: The psychometric properties of the Karolinska Sleep Questionnaire. J Sleep Res. 1992, 1: 113-CrossRef Kecklund G, Åkerstedt T: The psychometric properties of the Karolinska Sleep Questionnaire. J Sleep Res. 1992, 1: 113-CrossRef
24.
go back to reference Hanson LL, Akerstedt T, Naswall K, Leineweber C, Theorell T, Westerlund H: Cross-lagged relationships between workplace demands, control, support, and sleep problems. Sleep. 2011, 34: 1403-1410.PubMedPubMedCentral Hanson LL, Akerstedt T, Naswall K, Leineweber C, Theorell T, Westerlund H: Cross-lagged relationships between workplace demands, control, support, and sleep problems. Sleep. 2011, 34: 1403-1410.PubMedPubMedCentral
25.
go back to reference Engstrøm M, Ødegård S, Sand T, Stovner L, Zwart J, Hagen K: The Reliability of a New Sleep Screening Questionnaire for Large Population-Based Studies: The Third Nord-Trøndelag Health Study. Open Sleep J. 2011, 4: 14-19.CrossRef Engstrøm M, Ødegård S, Sand T, Stovner L, Zwart J, Hagen K: The Reliability of a New Sleep Screening Questionnaire for Large Population-Based Studies: The Third Nord-Trøndelag Health Study. Open Sleep J. 2011, 4: 14-19.CrossRef
26.
go back to reference Sivertsen B, Krokstad S, Overland S, Mykletun A: The epidemiology of insomnia: associations with physical and mental health. The HUNT-2 study. J Psychosom Res. 2009, 67: 109-116.CrossRefPubMed Sivertsen B, Krokstad S, Overland S, Mykletun A: The epidemiology of insomnia: associations with physical and mental health. The HUNT-2 study. J Psychosom Res. 2009, 67: 109-116.CrossRefPubMed
27.
go back to reference Flegal KM, Kit BK, Orpana H, Graubard BI: Association of all-cause mortality with overweight and obesity using standard body mass index categories: a systematic review and meta-analysis. JAMA. 2013, 309: 71-82.CrossRefPubMedPubMedCentral Flegal KM, Kit BK, Orpana H, Graubard BI: Association of all-cause mortality with overweight and obesity using standard body mass index categories: a systematic review and meta-analysis. JAMA. 2013, 309: 71-82.CrossRefPubMedPubMedCentral
28.
go back to reference World Health Organization: The ICD-10 Classification of Mental and Behavioural Disorders: Diagnostic criteria for research. 1993, Geneva: World Health Organization World Health Organization: The ICD-10 Classification of Mental and Behavioural Disorders: Diagnostic criteria for research. 1993, Geneva: World Health Organization
29.
go back to reference Zigmond AS, Snaith RP: The hospital anxiety and depression scale. Acta Psychiatr Scand. 1983, 67: 361-370.CrossRefPubMed Zigmond AS, Snaith RP: The hospital anxiety and depression scale. Acta Psychiatr Scand. 1983, 67: 361-370.CrossRefPubMed
30.
go back to reference Bjelland I, Dahl AA, Haug TT, Neckelmann D: The validity of the Hospital Anxiety and Depression Scale. An updated literature review. J Psychosom Res. 2002, 52: 69-77.CrossRefPubMed Bjelland I, Dahl AA, Haug TT, Neckelmann D: The validity of the Hospital Anxiety and Depression Scale. An updated literature review. J Psychosom Res. 2002, 52: 69-77.CrossRefPubMed
31.
go back to reference Olsson I, Mykletun A, Dahl AA: The Hospital Anxiety and Depression Rating Scale: a cross-sectional study of psychometrics and case finding abilities in general practice. BMC Psychiatry. 2005, 5: 46-CrossRefPubMedPubMedCentral Olsson I, Mykletun A, Dahl AA: The Hospital Anxiety and Depression Rating Scale: a cross-sectional study of psychometrics and case finding abilities in general practice. BMC Psychiatry. 2005, 5: 46-CrossRefPubMedPubMedCentral
32.
go back to reference Sivertsen B, Overland S, Glozler N, Bjorvatn B, Maeland JG, Mykletun A: The effect of OSAS on sick leave and work disability. Eur Respir J. 2008, 32: 1497-1503.CrossRefPubMed Sivertsen B, Overland S, Glozler N, Bjorvatn B, Maeland JG, Mykletun A: The effect of OSAS on sick leave and work disability. Eur Respir J. 2008, 32: 1497-1503.CrossRefPubMed
33.
go back to reference Kapuniai LE, Andrew DJ, Crowell DH, Pearce JW: Identifying sleep apnea from self-reports. Sleep. 1988, 11: 430-436.PubMed Kapuniai LE, Andrew DJ, Crowell DH, Pearce JW: Identifying sleep apnea from self-reports. Sleep. 1988, 11: 430-436.PubMed
34.
go back to reference Collaborating Centre Oslo WHO: ATC/DDD classification. 2012, Oslo: WHO Collaborating Centre for Drug Statistics Methodology Collaborating Centre Oslo WHO: ATC/DDD classification. 2012, Oslo: WHO Collaborating Centre for Drug Statistics Methodology
35.
go back to reference O'Brien RM: A caution regarding rules of thumb for variance inflation factors. Qual Quantity. 2007, 41: 673-690.CrossRef O'Brien RM: A caution regarding rules of thumb for variance inflation factors. Qual Quantity. 2007, 41: 673-690.CrossRef
37.
go back to reference Sivertsen B, Overland S, Pallesen S, Bjorvatn B, Nordhus IH, Maeland JG, Mykletun A: Insomnia and long sleep duration are risk factors for later work disability. The Hordaland Health Study. J Sleep Res. 2009, 18: 122-128.CrossRefPubMed Sivertsen B, Overland S, Pallesen S, Bjorvatn B, Nordhus IH, Maeland JG, Mykletun A: Insomnia and long sleep duration are risk factors for later work disability. The Hordaland Health Study. J Sleep Res. 2009, 18: 122-128.CrossRefPubMed
38.
go back to reference Edinger JD, Bonnet MH, Bootzin RR, Doghramji K, Dorsey CM, Espie CA, Jamieson AO, McCall WV, Morin CM, Stepanski EJ: Derivation of research diagnostic criteria for insomnia: report of an American Academy of Sleep Medicine Work Group. Sleep. 2004, 27: 1567-1596.PubMed Edinger JD, Bonnet MH, Bootzin RR, Doghramji K, Dorsey CM, Espie CA, Jamieson AO, McCall WV, Morin CM, Stepanski EJ: Derivation of research diagnostic criteria for insomnia: report of an American Academy of Sleep Medicine Work Group. Sleep. 2004, 27: 1567-1596.PubMed
39.
go back to reference American Academy of Sleep Medicine: The International Classification of Sleep Disorders: Diagnostic & Coding Manual, ICSD-2. 2005, Westchester, Ill: American Academy of Sleep Medicine, 2 American Academy of Sleep Medicine: The International Classification of Sleep Disorders: Diagnostic & Coding Manual, ICSD-2. 2005, Westchester, Ill: American Academy of Sleep Medicine, 2
40.
go back to reference Pilcher JJ, Huffcutt AI: Effects of sleep deprivation on performance: a meta-analysis. Sleep. 1996, 19: 318-326.PubMed Pilcher JJ, Huffcutt AI: Effects of sleep deprivation on performance: a meta-analysis. Sleep. 1996, 19: 318-326.PubMed
41.
go back to reference Shekleton JA, Rogers NL, Rajaratnam SM: Searching for the daytime impairments of primary insomnia. Sleep Med Rev. 2010, 14: 47-60.CrossRefPubMed Shekleton JA, Rogers NL, Rajaratnam SM: Searching for the daytime impairments of primary insomnia. Sleep Med Rev. 2010, 14: 47-60.CrossRefPubMed
43.
go back to reference Manabe K, Matsui T, Yamaya M, Sato-Nakagawa T, Okamura N, Arai H, Sasaki H: Sleep patterns and mortality among elderly patients in a geriatric hospital. Gerontology. 2000, 46: 318-322.CrossRefPubMed Manabe K, Matsui T, Yamaya M, Sato-Nakagawa T, Okamura N, Arai H, Sasaki H: Sleep patterns and mortality among elderly patients in a geriatric hospital. Gerontology. 2000, 46: 318-322.CrossRefPubMed
44.
go back to reference Hublin C, Partinen M, Koskenvuo M, Kaprio J: Sleep and mortality: A population-based 22-year follow-up study. Sleep. 2007, 30: 1245-1253.PubMedPubMedCentral Hublin C, Partinen M, Koskenvuo M, Kaprio J: Sleep and mortality: A population-based 22-year follow-up study. Sleep. 2007, 30: 1245-1253.PubMedPubMedCentral
45.
go back to reference American Psychiatric Association: Diagnostic and statistical manual of mental disorders: DSM-IV. 1994, Washington, D.C: APA, 4 American Psychiatric Association: Diagnostic and statistical manual of mental disorders: DSM-IV. 1994, Washington, D.C: APA, 4
46.
go back to reference Kessler RC, Berglund PA, Coulouvrat C, Fitzgerald T, Hajak G, Roth T, Shahly V, Shillington AC, Stephenson JJ, Walsh JK: Insomnia, comorbidity, and risk of injury among insured Americans: results from the America Insomnia Survey. Sleep. 2012, 35: 825-834.CrossRefPubMedPubMedCentral Kessler RC, Berglund PA, Coulouvrat C, Fitzgerald T, Hajak G, Roth T, Shahly V, Shillington AC, Stephenson JJ, Walsh JK: Insomnia, comorbidity, and risk of injury among insured Americans: results from the America Insomnia Survey. Sleep. 2012, 35: 825-834.CrossRefPubMedPubMedCentral
47.
go back to reference Ohayon MM: Prevalence of DSM-IV diagnostic criteria of insomnia: distinguishing insomnia related to mental disorders from sleep disorders. J Psychiatr Res. 1997, 31: 333-346.CrossRefPubMed Ohayon MM: Prevalence of DSM-IV diagnostic criteria of insomnia: distinguishing insomnia related to mental disorders from sleep disorders. J Psychiatr Res. 1997, 31: 333-346.CrossRefPubMed
48.
go back to reference Bresnitz EA, Goldberg R, Kosinski RM: Epidemiology of obstructive sleep apnea. Epidemiol Rev. 1994, 16: 210-227.PubMed Bresnitz EA, Goldberg R, Kosinski RM: Epidemiology of obstructive sleep apnea. Epidemiol Rev. 1994, 16: 210-227.PubMed
49.
go back to reference Kripke DF, Ancoli-Israel S, Klauber MR, Wingard DL, Mason WJ, Mullaney DJ: Prevalence of sleep-disordered breathing in ages 40-64 years: a population-based survey. Sleep. 1997, 20: 65-76.PubMedPubMedCentral Kripke DF, Ancoli-Israel S, Klauber MR, Wingard DL, Mason WJ, Mullaney DJ: Prevalence of sleep-disordered breathing in ages 40-64 years: a population-based survey. Sleep. 1997, 20: 65-76.PubMedPubMedCentral
50.
go back to reference Ohayon MM, Guilleminault C, Priest RG, Caulet M: Snoring and breathing pauses during sleep: telephone interview survey of a United Kingdom population sample. BMJ. 1997, 314: 860-863.CrossRefPubMedPubMedCentral Ohayon MM, Guilleminault C, Priest RG, Caulet M: Snoring and breathing pauses during sleep: telephone interview survey of a United Kingdom population sample. BMJ. 1997, 314: 860-863.CrossRefPubMedPubMedCentral
51.
go back to reference Partinen M: Epidemiology of obstructive sleep apnea syndrome. Curr Opin Pulm Med. 1995, 1: 482-487.CrossRefPubMed Partinen M: Epidemiology of obstructive sleep apnea syndrome. Curr Opin Pulm Med. 1995, 1: 482-487.CrossRefPubMed
52.
go back to reference Young T, Palta M, Dempsey J, Skatrud J, Weber S, Badr S: The occurrence of sleep-disordered breathing among middle-aged adults. N Engl J Med. 1993, 328: 1230-1235.CrossRefPubMed Young T, Palta M, Dempsey J, Skatrud J, Weber S, Badr S: The occurrence of sleep-disordered breathing among middle-aged adults. N Engl J Med. 1993, 328: 1230-1235.CrossRefPubMed
53.
go back to reference Chatterjee S, Hadi A: Regression Analysis by Example. 2006, John Wiley & SonsCrossRef Chatterjee S, Hadi A: Regression Analysis by Example. 2006, John Wiley & SonsCrossRef
54.
go back to reference Larsen SB, Dalton SO, Schuz J, Christensen J, Overvad K, Tjonneland A, Johansen C, Olsen A: Mortality among participants and non-participants in a prospective cohort study. Eur J Epidemiol. 2012, 27: 837-845.CrossRefPubMed Larsen SB, Dalton SO, Schuz J, Christensen J, Overvad K, Tjonneland A, Johansen C, Olsen A: Mortality among participants and non-participants in a prospective cohort study. Eur J Epidemiol. 2012, 27: 837-845.CrossRefPubMed
55.
go back to reference Uhlig BL, Sand T, Odegard SS, Hagen K: Prevalence and associated factors of DSM-V insomnia in Norway: the Nord-Trondelag Health Study (HUNT 3). Sleep Med. 2014, 15: 708-713.CrossRefPubMed Uhlig BL, Sand T, Odegard SS, Hagen K: Prevalence and associated factors of DSM-V insomnia in Norway: the Nord-Trondelag Health Study (HUNT 3). Sleep Med. 2014, 15: 708-713.CrossRefPubMed
Metadata
Title
Midlife insomnia and subsequent mortality: the Hordaland health study
Authors
Børge Sivertsen
Ståle Pallesen
Nick Glozier
Bjørn Bjorvatn
Paula Salo
Grethe S Tell
Reidun Ursin
Simon Øverland
Publication date
01-12-2014
Publisher
BioMed Central
Published in
BMC Public Health / Issue 1/2014
Electronic ISSN: 1471-2458
DOI
https://doi.org/10.1186/1471-2458-14-720

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