Laetitia Teixeira is a Biostatistician and Invited Assistant Professor at the Institute of Biomedical Sciences Abel Salazar, University of Porto. She is also Researcher in the Center for Health Technology and Services Research, Institute of Biomedical Sciences Abel Salazar (CINTESIS-ICBAS, UP). Her main interests/areas of studies are Biostatistics (survival analysis, competing risks, joint modelling) and Health (centenarians, old people, peritoneal dialysis), with several publications in these areas. Lia Araújo is a Gerontologist and Assistant Professor at the Polytechnic Institute of Viseu and Researcher in the Center for Health Technology and Services Research, Institute of Biomedical Sciences Abel Salazar (CINTESIS-ICBAS, UP). Her main research interests are focused on the oldest old, centenarian´s psychosocial specificities, and in positive approaches to the aging process (successful and active aging models).Constança Paúl is a Psychologist and Full Professor at the Institute of Biomedical Sciences Abel Salazar, University of Porto. She is a senior researcher of the Ageing Cluster research group at the Center for Health Technology and Services Research, Institute of Biomedical Sciences Abel Salazar (CINTESIS-ICBAS.UP) and Head of the PhD course on Gerontology and Geriatrics (ICBAS-UP). Her current areas of interest include health in later life and its social correlates (e.g., loneliness), neurocognitive disorders (Alzheimer disease) and frailty.Oscar Ribeiro is a Psychologist and Auxiliary Professor at the Education and Psychology Department of the University of Aveiro. He is the principal investigator of the Ageing Cluster research group at the Center for Health Technology and Services Research (CINTESIS) and Head of the PhD course on Gerontology and Geriatrics (UA). He is the PI of the Oporto Centenarian Study (PT100 study) and his main research interests include mentalhealth issues in advanced ages (clinical and subclinical syndromes), centenarians’ psychological strengths, and formal and informal care provision to the oldest old.

• Introduction.- Socio-demographic aspects of centenarians.- Health related characteristics.- Living conditions.- Final remarks.

Laetitia Teixeira is a Biostatistician and Invited Assistant Professor at the Institute of Biomedical Sciences Abel Salazar, University of Porto. She is also Researcher in the Center for Health Technology and Services Research, Institute of Biomedical Sciences Abel Salazar (CINTESIS-ICBAS, UP). Her main interests/areas of studies are Biostatistics (survival analysis, competing risks, joint modelling) and Health (centenarians, old people, peritoneal dialysis), with several publications in these areas. Lia Araújo is a Gerontologist and Assistant Professor at the Polytechnic Institute of Viseu and Researcher in the Center for Health Technology and Services Research, Institute of Biomedical Sciences Abel Salazar (CINTESIS-ICBAS, UP). Her main research interests are focused on the oldest old, centenarian´s psychosocial specificities, and in positive approaches to the aging process (successful and active aging models).Constança Paúl is a Psychologist and Full Professor at the Institute of Biomedical Sciences Abel Salazar, University of Porto. She is a senior researcher of the Ageing Cluster research group at the Center for Health Technology and Services Research, Institute of Biomedical Sciences Abel Salazar (CINTESIS-ICBAS.UP) and Head of the PhD course on Gerontology and Geriatrics (ICBAS-UP). Her current areas of interest include health in later life and its social correlates (e.g., loneliness), neurocognitive disorders (Alzheimer disease) and frailty.Oscar Ribeiro is a Psychologist and Auxiliary Professor at the Education and Psychology Department of the University of Aveiro. He is the principal investigator of the Ageing Cluster research group at the Center for Health Technology and Services Research (CINTESIS) and Head of the PhD course on Gerontology and Geriatrics (UA). He is the PI of the Oporto Centenarian Study (PT100 study) and his main research interests include mentalhealth issues in advanced ages (clinical and subclinical syndromes), centenarians’ psychological strengths, and formal and informal care provision to the oldest old.

• Introduction.- Socio-demographic aspects of centenarians.- Health related characteristics.- Living conditions.- Final remarks.

Laetitia Teixeira is a Biostatistician and Invited Assistant Professor at the Institute of Biomedical Sciences Abel Salazar, University of Porto. She is also Researcher in the Center for Health Technology and Services Research, Institute of Biomedical Sciences Abel Salazar (CINTESIS-ICBAS, UP). Her main interests/areas of studies are Biostatistics (survival analysis, competing risks, joint modelling) and Health (centenarians, old people, peritoneal dialysis), with several publications in these areas. Lia Araújo is a Gerontologist and Assistant Professor at the Polytechnic Institute of Viseu and Researcher in the Center for Health Technology and Services Research, Institute of Biomedical Sciences Abel Salazar (CINTESIS-ICBAS, UP). Her main research interests are focused on the oldest old, centenarian´s psychosocial specificities, and in positive approaches to the aging process (successful and active aging models).Constança Paúl is a Psychologist and Full Professor at the Institute of Biomedical Sciences Abel Salazar, University of Porto. She is a senior researcher of the Ageing Cluster research group at the Center for Health Technology and Services Research, Institute of Biomedical Sciences Abel Salazar (CINTESIS-ICBAS.UP) and Head of the PhD course on Gerontology and Geriatrics (ICBAS-UP). Her current areas of interest include health in later life and its social correlates (e.g., loneliness), neurocognitive disorders (Alzheimer disease) and frailty.Oscar Ribeiro is a Psychologist and Auxiliary Professor at the Education and Psychology Department of the University of Aveiro. He is the principal investigator of the Ageing Cluster research group at the Center for Health Technology and Services Research (CINTESIS) and Head of the PhD course on Gerontology and Geriatrics (UA). He is the PI of the Oporto Centenarian Study (PT100 study) and his main research interests include mentalhealth issues in advanced ages (clinical and subclinical syndromes), centenarians’ psychological strengths, and formal and informal care provision to the oldest old.

• Introduction.- Socio-demographic aspects of centenarians.- Health related characteristics.- Living conditions.- Final remarks.