DOI: 10.3886/icpsr34315.v1
title: The Irish Longitudinal Study on Ageing (TILDA), 2009-2011
title: TILDA Wave 1
title: Version 1

description: The Irish Longitudinal Study on Ageing (TILDA) is a major inter-institutional initiative led by Trinity College Dublin which aims to produce a massive improvement in the quantity and quality of data, research and information relating to older people and ageing in Ireland. Eligible respondents for this study include individuals aged 50 and over and their spouses or partners of any age. The study involves interviews on a two yearly basis with a sample cohort of 8,504 people aged 50 and over (or their spouses/partners) and resident in Ireland, collecting detailed information on all aspects of their lives, including the economic (pensions, employment, living standards), health (physical, mental, service needs and usage) and social aspects (contact with friends and kin, formal and informal care, social participation). Both survey interviews and physical and biological measurements are utilized. Demographic and background variables include age, sex, marital status, household composition, education, and employment.
description: This research aims to produce a massive improvement in the quantity and quality of data, research and information relating to older people and ageing in Ireland.
description: ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of 
				disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major 
				statistical software formats as well as standard codebooks to accompany the data. In addition to 
				these procedures, ICPSR performed the following processing steps for this data collection:
			   		Created variable labels and/or value labels.; Standardized missing values.; Created online analysis version with question text.; Checked for undocumented or out-of-range codes..
description: Presence of Common Scales: 
					See: Tilda-Wave 1 AMF-Derived Variables Codebook-v.1.0.html for scales used.
description: Response Rates: 
					62 percent
description: Datasets: 
					
						DS1: The Irish Longitudinal Study on Ageing (TILDA), 2009-2011
description: computer-assisted personal interview (CAPI)
description: face-to-face interview
description: mail questionnaire
description: self-enumerated questionnaire
description: Individuals aged 50 years and older and their spouses or partners of any age, who are resident in Ireland.
description: The sample design incorporates stratification, clustering, multi-stage selection, and representative probablity sampling. The dataset contains the cluster variables CLUSTER and HOUSEHOLD, and the strata variable STRATUM. CLUSTER and HOUSEHOLD describe the household and geographic clusters to which participants belong. The selection of geographic clusters was stratified, so that equal numbers of clusters were selected from each of three socio-economic groups. The socio-economic status of a cluster was defined by the proportion of individuals in that cluster. STRATUM describes to which of three cluster-level socio-economic groups the respondents belong. Please refer to the Release Guide for additional information on sampling.