All Stories

  1. Association of mainly vegetarian and vegan diets with loneliness, social isolation and social withdrawal in a German population survey

    Article • PLOS One, July 2026, PLOS

    Dr. André Hajek

  2. Translation and validation of the artificial intelligence anxiety scale in German

    Article • PLOS One, October 2025, PLOS

    Dr. André Hajek

  3. German population norms of the preference to solitude scale and its correlates

    Article • PLOS One, May 2024, PLOS

    Dr. André Hajek

  4. Does grandchild care affect ageing satisfaction? Findings based on a nationally representative longitudinal study

    Article • PLOS One, March 2022, PLOS

    Dr. André Hajek

  5. Level and correlates of empathy and altruism during the Covid-19 pandemic. Evidence from a representative survey in Germany

    Article • PLOS One, March 2022, PLOS

    Dr. André Hajek

  6. Attitudes towards the economic costs associated with measures against the spread of COVID-19: Population perceptions from repeated cross-sectional data of the nationally representative COVID-19 Snapshot Monitoring in Germany (COSMO)

    Article • PLOS One, November 2021, PLOS

    Dr. André Hajek

  7. Personality and the use of cancer screenings. A systematic review

    Article • PLOS One, December 2020, PLOS

    Dr. André Hajek

  8. Fear of Dementia in the General Population: Findings from the German Socio-Economic Panel (GSOEP)

    Article • Journal of Alzheimer’s Disease, June 2020, IOS Press

    Dr. André Hajek

  9. Needs and health care costs in old age: a longitudinal perspective: results from the AgeMooDe study

    Article • Aging & Mental Health, October 2019, Taylor & Francis

    Dr. André Hajek, Dr. med. Steffi Gerlinde Riedel-Heller, Dr. Christian Brettschneider

  10. Impact of stroke on affective well-being: findings from a large longitudinal nationally representative study

    Article • Aging & Mental Health, October 2019, Taylor & Francis

    Dr. André Hajek

  11. How do cat owners, dog owners and individuals without pets differ in terms of psychosocial outcomes among individuals in old age without a partner?

    Article • Aging & Mental Health, July 2019, Taylor & Francis

    Dr. André Hajek

  12. The impact of receiving informal care on self-esteem and its moderation by social class

    Article • Aging & Mental Health, June 2019, Taylor & Francis

    Dr. André Hajek

  13. The role of optimism in the relationship between job stress and depressive symptoms. Longitudinal findings from the German Ageing Survey

    Article • Journal of Affective Disorders, December 2018, Elsevier

    Dr. André Hajek

  14. Leadership position and physician visits – results of a nationally representative longitudinal study in Germany

    Article • Journal of Occupational Medicine and Toxicology, October 2018, Springer Science + Business Media

    Dr. André Hajek

  15. The association between obesity and social exclusion in middle-aged and older adults: findings from a nationally representative study in Germany

    Article • BMC Geriatrics, October 2018, Springer Science + Business Media

    Dr. André Hajek

  16. Impact of informal caregiving on loneliness and satisfaction with leisure-time activities. Findings of a population-based longitudinal study in germany

    Article • Aging & Mental Health, October 2018, Taylor & Francis

    Dr. André Hajek

  17. Obesity and loneliness. Findings from a longitudinal population-based study in the second half of life in Germany

    Article • Psychogeriatrics, October 2018, Wiley

    Dr. André Hajek

  18. Do Individuals in Old Age Prepare for the Risk of Long-Term Care? Results of A Population-Based Survey in Germany

    Article • International Journal of Environmental Research and Public Health, October 2018, MDPI AG

    Dr. André Hajek

  19. Informal caregiving and personality: Results of a population-based longitudinal study in Germany

    Article • PLOS One, September 2018, PLOS

    Dr. André Hajek

  20. Which factors lead to frequent attendance in the outpatient sector among individuals in the second half of life? Evidence from a population-based longitudinal study in Germany

    Article • BMC Health Services Research, August 2018, Springer Science + Business Media

    Dr. André Hajek

  21. Impact of Incident Parkinson's Disease on Satisfaction With Life

    Article • Frontiers in Neurology, July 2018, Frontiers

    Dr. André Hajek

  22. Impact of falls on depressive symptoms among the oldest old: Results from the AgeQualiDe study

    Article • International Journal of Geriatric Psychiatry, July 2018, Wiley

    Dr. André Hajek, Dr. Christian Brettschneider

  23. What Is Successful Aging? A Psychometric Validation Study of Different Construct Definitions

    Article • The Gerontologist, July 2018, Oxford University Press (OUP)

    Dr. André Hajek

  24. Late-life depressive symptoms are associated with functional impairment cross-sectionally and over time: Results of the AgeMooDe study

    Article • The Journals of Gerontology Series B, July 2018, Oxford University Press (OUP)

    Dr. André Hajek

  25. Consequences of different types of informal caregiving for mental, self-rated, and physical health: longitudinal findings from the German Ageing Survey

    Article • Quality of Life Research, June 2018, Springer Science + Business Media

    Dr. André Hajek

  26. Are changes in body-mass-index associated with changes in depressive symptoms? Findings of a population-based longitudinal study among older Germans

    Article • BMC Psychiatry, June 2018, Springer Science + Business Media

    Dr. André Hajek

  27. Obesity and sickness absence: results from a longitudinal nationally representative sample from Germany

    Article • BMJ Open, June 2018, BMJ

    Dr. André Hajek

  28. A systematic review of the association of anxiety with health care utilization and costs in people aged 65 years and older

    Article • Journal of Affective Disorders, May 2018, Elsevier

    Dr. André Hajek

  29. Informelle Pflege bei Demenz nach Leistungsarten

    Article • Der Nervenarzt, April 2018, Springer Science + Business Media

    Dr. André Hajek, Dr. Christian Brettschneider

  30. Longitudinal Analysis of Outpatient Physician Visits in the Oldest Old: Results of the AgeQualiDe Prospective Cohort Study

    Article • The journal of nutrition health & aging, January 2018, Springer Science + Business Media

    Dr. André Hajek, Dr. Christian Brettschneider

  31. The relation between personality, informal caregiving, life satisfaction and health-related quality of life: evidence of a longitudinal study

    Article • Quality of Life Research, January 2018, Springer Science + Business Media

    Dr. André Hajek

  32. Correlates of preferences for autonomy in long-term care: results of a population-based survey among older individuals in Germany

    Article • Patient Preference and Adherence, January 2018, Dove Medical Press

    Dr. André Hajek, Dr. med. Steffi Gerlinde Riedel-Heller

  33. Self-efficacy moderates the relationship between health comparisons and social exclusion: results of the German ageing survey

    Article • Health and Quality of Life Outcomes, December 2017, Springer Science + Business Media

    Dr. André Hajek

  34. Frequent attenders in late life in primary care: a systematic review of European studies

    Article • BMC Family Practice, December 2017, Springer Science + Business Media

    Dr. André Hajek

  35. The role of self-efficacy, self-esteem and optimism for using routine health check-ups in a population-based sample. A longitudinal perspective

    Article • Preventive Medicine, December 2017, Elsevier

    Dr. André Hajek

  36. Does informal caregiving affect self-esteem? Results from a population-based study of individuals aged 40 and over in Germany from 2002 to 2014

    Article • Scandinavian Journal of Caring Sciences, November 2017, Wiley

    Dr. André Hajek

  37. Psychological correlates of fear of falling: Findings from the German Aging Survey

    Article • Geriatrics and Gerontology International, November 2017, Wiley

    Dr. André Hajek

  38. The role of general psychosocial factors for the use of cancer screening-Findings of a population-based observational study among older adults in Germany

    Article • Cancer Medicine, October 2017, Wiley

    Dr. André Hajek

  39. Psychosocial correlates of unintentional weight loss in the second half of life in the German general population

    Article • PLOS One, October 2017, PLOS

    Dr. André Hajek

  40. The longitudinal association between informal caregiving and body mass index in the second half of life: findings of the German Ageing Survey

    Article • Public Health, October 2017, Elsevier

    Dr. André Hajek

  41. Association of informal caregiving with body mass index and frequency of sporting activities: evidence of a population-based study in Germany

    Article • BMC Public Health, September 2017, Springer Science + Business Media

    Dr. André Hajek

  42. The use of routine health check-ups and psychological factors—a neglected link. Evidence from a population-based study

    Article • Journal of Public Health, September 2017, Springer Science + Business Media

    Dr. André Hajek

  43. Frailty and healthcare costs—longitudinal results of a prospective cohort study

    Article • Age and Ageing, September 2017, Oxford University Press (OUP)

    Dr. André Hajek

  44. Correlates of alcohol consumption among Germans in the second half of life. Results of a population-based observational study

    Article • BMC Geriatrics, September 2017, Springer Science + Business Media

    Dr. André Hajek

  45. The association of falls with loneliness and social exclusion: evidence from the DEAS German Ageing Survey

    Article • BMC Geriatrics, September 2017, Springer Science + Business Media

    Dr. André Hajek

  46. Psychological determinants of influenza vaccination

    Article • BMC Geriatrics, August 2017, Springer Science + Business Media

    Dr. André Hajek

  47. Who should take care of me? Preferences of old age individuals for characteristics of professional long-term caregivers: an observational cross-sectional study

    Article • BMC Research Notes, August 2017, Springer Science + Business Media

    Dr. André Hajek

  48. The role of personality in health care use: Results of a population-based longitudinal study in Germany

    Article • PLOS One, July 2017, PLOS

    Dr. André Hajek

  49. The impact of social engagement on health-related quality of life and depressive symptoms in old age - evidence from a multicenter prospective cohort study in Germany

    Article • Health and Quality of Life Outcomes, July 2017, Springer Science + Business Media

    Dr. André Hajek, Dr. Christian Brettschneider

  50. Does visual impairment affect social ties in late life? Findings of a multicenter prospective cohort study in Germany

    Article • The journal of nutrition health & aging, June 2017, Elsevier

    Dr. André Hajek, Dr. Christian Brettschneider

  51. Regionale Unterschiede bei demografischer Alterung

    Article • Psychiatrische Praxis, May 2017, Thieme Publishing Group

    Dr. André Hajek

  52. Locus of control and frequency of physician visits: Results of a population-based longitudinal study in Germany

    Article • British Journal of Health Psychology, March 2017, Wiley

    Dr. André Hajek

  53. Association of general psychological factors with frequent attendance in primary care: a population-based cross-sectional observational study

    Article • BMC Family Practice, March 2017, Springer Science + Business Media

    Dr. André Hajek

  54. The Longitudinal Association between Psychological Factors and Health Care Use

    Article • Health Services Research, March 2017, Wiley

    Dr. André Hajek

  55. Langzeitpflegepräferenzen der Älteren in Deutschland – Ergebnisse einer bevölkerungsrepräsentativen Umfrage

    Article • Das Gesundheitswesen, March 2017, Thieme Publishing Group

    Dr. André Hajek

  56. Factors associated with preferences for long-term care settings in old age: evidence from a population-based survey in Germany

    Article • BMC Health Services Research, February 2017, Springer Science + Business Media

    Dr. André Hajek

  57. How does social support affect functional impairment in late life? Findings of a multicenter prospective cohort study in Germany

    Article • Age and Ageing, February 2017, Oxford University Press (OUP)

    Dr. André Hajek, Dr. Christian Brettschneider

  58. The Impact of Depressive Symptoms on Healthcare Costs in Late Life: Longitudinal Findings From the AgeMooDe Study

    Article • American Journal of Geriatric Psychiatry, February 2017, Elsevier

    Dr. André Hajek

  59. Disentangling the complex relation of disability and depressive symptoms in old age – findings of a multicenter prospective cohort study in Germany

    Article • International Psychogeriatrics, January 2017, Cambridge University Press

    Dr. André Hajek, Dr. Christian Brettschneider

  60. Informelles Pflegepotenzial bei Älteren in Deutschland

    Article • Zeitschrift für Gerontologie und Geriatrie, January 2017, Springer Science + Business Media

    Dr. André Hajek

  61. Unterschiede in Kognition, Depressivität und gesundheitsbezogener Lebensqualität zwischen Versicherten der GKV und PKV im hohen Alter

    Article • Psychiatrische Praxis, January 2017, Thieme Publishing Group

    Dr. André Hajek

  62. Which factors affect health care use among older Germans? Results of the German ageing survey

    Article • BMC Health Services Research, January 2017, Springer Science + Business Media

    Dr. André Hajek

  63. The Curvilinear Effect of BMI on Functional Health - Evidence of the Long-Running German Ageing Survey

    Article • Obesity Facts, January 2017, Karger Publishers

    Dr. André Hajek

  64. Effect of Visual Impairment on Physical and Cognitive Function in Old Age: Findings of a Population-Based Prospective Cohort Study in Germany

    Article • Journal of the American Geriatrics Society, September 2016, Wiley

    Dr. André Hajek, Dr. Christian Brettschneider

  65. The role of flexible goal adjustment in the effect of informal caregiving on depressive symptoms: Evidence of a large population-based longitudinal study in Germany from 2002 to 2011

    Article • Quality of Life Research, August 2016, Springer Science + Business Media

    Dr. André Hajek

  66. Factors affecting functional impairment among elderly Germans — Results of a longitudinal study

    Article • The journal of nutrition health & aging, July 2016, Springer Science + Business Media

    Dr. André Hajek, Dr. Christian Brettschneider

  67. Negative Health Comparisons Decrease Affective and Cognitive Well-Being in Older Adults. Evidence from a Population-Based Longitudinal Study in Germany

    Article • Frontiers in Psychology, June 2016, Frontiers

    Dr. André Hajek

  68. Unterschiede in der Morbidität nach Krankenversichertenstatus im Alter

    Article • Das Gesundheitswesen, June 2016, Thieme Publishing Group

    Dr. André Hajek

  69. A Longitudinal Investigation of Willingness to Pay for Health Insurance in Germany

    Article • Health Services Research, June 2016, Wiley

    Dr. André Hajek

  70. Effect of Health Comparisons on Functional Health and Depressive Symptoms - Results of a Population-Based Longitudinal Study of Older Adults in Germany

    Article • PLOS One, May 2016, PLOS

    Dr. André Hajek

  71. Einflussfaktoren auf die Pflegebedürftigkeit im Längsschnitt

    Article • Das Gesundheitswesen, April 2016, Thieme Publishing Group

    Dr. André Hajek, Dr. Christian Brettschneider

  72. Informal Caregiving and Subjective Well-Being: Evidence of a Population-Based Longitudinal Study of Older Adults in Germany

    Article • Journal of the American Medical Directors Association, April 2016, Elsevier

    Dr. André Hajek

  73. The Effect of Intra- and Intergenerational Caregiving on Subjective Well-Being – Evidence of a Population Based Longitudinal Study among Older Adults in Germany

    Article • PLOS One, February 2016, PLOS

    Dr. André Hajek

  74. Longitudinal Predictors of Functional Impairment in Older Adults in Europe – Evidence from the Survey of Health, Ageing and Retirement in Europe

    Article • PLOS One, January 2016, PLOS

    Dr. André Hajek

  75. Longitudinal Predictors of Institutionalization in Old Age

    Article • PLOS One, December 2015, PLOS

    Dr. André Hajek, Dr. Christian Brettschneider

  76. Predictors of frailty in old age–results of a longitudinal study

    Article • The journal of nutrition health & aging, December 2015, Springer Science + Business Media

    Dr. André Hajek, Dr. Christian Brettschneider

  77. Welche Faktoren beeinflussen die privaten Zuzahlungen zu Gesundheitsleistungen im Alter? Ergebnisse einer Längsschnittstudie

    Article • Das Gesundheitswesen, November 2015, Thieme Publishing Group

    Dr. André Hajek

  78. Mapping the Beck Depression Inventory to the Eq-5d-3l in Patients with Depressive Disorders

    Article • Value in Health, November 2015, Elsevier

    Dr. André Hajek, Dr. Christian Brettschneider

  79. Gender differences in the effect of social support on health-related quality of life: results of a population-based prospective cohort study in old age in Germany

    Article • Quality of Life Research, October 2015, Springer Science + Business Media

    Dr. André Hajek, Dr. Christian Brettschneider

  80. Determinants of health-related quality of life in older primary care patients: results of the longitudinal observational AgeCoDe Study

    Article • British Journal of General Practice, October 2015, Royal College of General Practitioners

    Dr. André Hajek

  81. Longitudinal predictors of informal and formal caregiving time in community-dwelling dementia patients

    Article • Social Psychiatry and Psychiatric Epidemiology, October 2015, Springer Science + Business Media

    Dr. André Hajek, Dr. Christian Brettschneider

  82. Prevalence and determinants of overweight and obesity in old age in Germany

    Article • BMC Geriatrics, July 2015, Springer Science + Business Media

    Dr. André Hajek

  83. Complex coevolution of depression and health-related quality of life in old age

    Article • Quality of Life Research, May 2015, Springer Science + Business Media

    Dr. André Hajek, Dr. Christian Brettschneider