State-of-the-Art in Longitudinal Studies on Aging: An Overview of the Supplement

Health and Health-Care Utilization of the Older Population of Ireland: Comparing the Intellectual Disability Population and the General Population

Background/Objectives:

Largely unresearched are the similarities and differences compared to the general population in the aging of people with an intellectual disability (ID). Data reported here compare the health and health-care utilization of the general aging population in Ireland with those who are aging with ID.

Design:

Data for comparisons were drawn from the 2010 The Irish Longitudinal Study on Ageing (TILDA) and the Intellectual Disability Supplement (IDS)-TILDA Wave 1 data sets.

Setting:

TILDA participants were community dwelling only while IDS-TILDA participants were drawn from community and institutional settings.

Participants:

TILDA consists of a sample of 8,178 individuals aged 50 years and older who were representative of the Irish population. The IDS-TILDA consists of a random sample of 753 persons aged 40 and older. Using age 50 as the initial criterion, 478 persons with ID were matched with TILDA participants on age, sex, and geographic location to create the sample for this comparison.

Measurements:

Both studies gathered self-reported data on physical and mental health, behavioral health, functional limitations, and health-care utilization.

Results:

Rates of chronic disease appeared higher overall for people with ID as compared to the general population. There were also age-related differences in the prevalence of diabetes and cancer and different rates of engagement between the two groups in relevant behavioral health activities such as smoking. There were higher utilization levels among IDS-TILDA participants for allied health and general practitioner visits.

Conclusion:

Different disease trajectories found among IDS-TILDA participants raise concerns. The longitudinal comparison of data for people with ID and for the general population offered a better opportunity for the unique experiences of people with ID to be included in data that inform health planning.

The Longitudinal Urban Cohort Ageing Study (LUCAS): study protocol and participation in the first decade

Background

We present concept, study protocol and selected baseline data of the Longitudinal Urban Cohort Ageing Study (LUCAS) in Germany. LUCAS is a long-running cohort study of community-dwelling seniors complemented by specific studies of geriatric patients or diseases. Aims were to (1) Describe individual ageing trajectories in a metropolitan setting, documenting changes in functional status, the onset of frailty, disability and need of care; (2) Find determinants of healthy ageing; (3) Assess long-term effects of specific health promotion interventions; (4) Produce results for health care planning for fit, pre-frail, frail and disabled elderly persons; (5) Set up a framework for embedded studies to investigate various hypotheses in specific subgroups of elderly.

Methods/Design

In 2000, twenty-one general practitioners (GPs) were recruited in the Hamburg metropolitan area; they generated lists of all their patients 60 years and older. Persons not terminally ill, without daily need of assistance or professional care were eligible. Of these, n = 3,326 (48 %) agreed to participate and completed a small (baseline) and an extensive health questionnaire (wave 1). In 2007/2008, a re-recruitment took place including 2,012 participants: 743 men, 1,269 women (647 deaths, 197 losses, 470 declined further participation). In 2009/2010 n = 1,627 returned the questionnaire (90 deaths, 47 losses, 248 declined further participation) resulting in a good participation rate over ten years with limited and quantified dropouts. Presently, follow-up data from 2007/2008 (wave 2) and 2009/2010 (wave 3) are available. Data wave 4 is due in 2011/2012, and the project will be continued until 2013. Information on survival and need of nursing care was collected continuously and cross-checked against official records. We used Fisher’s exact test and t-tests. The study served repeatedly to evaluate health promotion interventions and concepts.

Discussion

LUCAS shows that a cohort study of older persons is feasible and can maintain a good participation rate over ten years, even when extensive self-reported health data are collected repeatedly through self-filled questionnaires. Evidently individual health developments of elderly persons can be tracked quantifying simultaneously behaviour, co-morbidity, functional competence and their changes. In future, we expect to generate results of significance about the five study aims listed above.