MADRID+90 study on factors associated with longevity

MADRID+90 is a multicentre, observational, two wave, cross-sectional study that will be conducted in two different waves. The present dataset corresponds specifically to Wave 1 that lasted from September 2019 to February 2020. The sample was randomly selected from the municipal census of Madrid (Spain) which includes any person living in the city. A total of 191 community-dwelling individuals aged 90 and over participated in this wave. Wave 1 surveys were conducted at the participants' homes by trained research staff. The complete visit took approximately 15 to 30 minutes. A structured questionnaire was used to collect information related to the following areas: demographic data, morbidity, medication, subjective cognitive decline, Spanish version of the Telephone Interview for Cognitive Status (TICS), perceived health, quality of life, functional dependence, and lifestyle habits. The responses of the participants, and the proxies when appropriate, were directly coded in electronic devices, so that the information was uploaded directly into the database.