You might be also interested in the "Blue Zones project" (zones where people live longer and organized in that sense) : see link below.  

http://www.bluezonesproject.com

You could also contact following British group :

http://www.newdynamics.group.shef.ac.uk/unfamiliar-space.html

And you might find information in the work and publications of Pr Michel Poulain (University of Tallinn) : demography, care to elderly, Blue Zones,....  Here is the link to his RG profile :

https://www.researchgate.net/profile/Michel_Poulain

Good morning Dr Aranda, so you can find these report about scale to measure successful aging in a community and predictors, is free :  Successful Aging: Predictors and Associated Activities.(http://aje.oxfordjournals.org/content/144/2/135.full.pdf+html)

Kinds regards.... saludos!!!

Good Morning Dr Aranda

First of all I think you need to consider carefully what you mean by "successful ageing" - if you mean absence of physical or cognitive problems, then the reference provided by Ernesto Torres-Lopez will certainly point you in the right direction. However, "successful ageing" is a much disputed (and for some a neo-liberal) concept. It might be worth looking at some of the work that considers what older people themselves say about ageing well, and what makes for quality of life in later life. You will find 1) that older people have a much wider view than simply the absence of ill-health or disability, although that clearly is very important to them,  and 2) there are cultural differences.

A useful review paper is Hung L, Kempen, G, De Vries, N. 2010. Cross-cultural comparison between academic and lay views of healthy ageing - a literature review. Ageing and Society 30(8) 1372 - 1391.

Ann Bowling has written many papers on quality of life in later life.

There is useful on-going longitudinal study of ageing and health in the oldest old - the Newcastle 85+ study.

Hope this is helpful.

Further to Karen's comments, there are myriad definitions of successful aging; our review from 2013 captured 105(!) unique definitions (https://www.researchgate.net/publication/259204731_Operational_definitions_of_successful_aging_A_systematic_review) and a further 26 studies that had conducted qualitative interviews regarding lay perspectives of successful aging (https://www.researchgate.net/publication/237085645_Lay_perspectives_of_successful_ageing_A_systematic_review_and_meta-ethnography). 

Based on the most commonly identified components in these reviews we developed a successful aging index (https://www.researchgate.net/publication/277008432_Validation_of_an_a_priori_index_model_of_successful_aging_in_a_population-based_cohort_study_The_Successful_Aging_Index), which may or may not be of use to you.

In my opinion, I think it is important to look at what you are trying to capture - and the purpose of the study - when deciding which definition of successful aging to employ.

Article Lay perspectives of successful ageing: A systematic review a...

Article Operational definitions of successful aging: A systematic review

Article Validation of an a priori, index model of successful aging i...

Biological age is measured by Telomere gene length but it might be expensive to run a large study measuring Telomere. In addition, it does not fully correlate with the real age; it is affected by cancer, neurodegenerative diseases, and psychological disorders.

Rudi G Westendorp has published several studies on this subject - for instance:

von Faber M, Bootsma-van der Wiel A, van Exel E, Gussekloo J, Lagaay AM, van Dongen E, et al. Successful aging in the oldest old: Who can be characterized as successfully aged? Arch Intern Med. 2001;161(22):2694-700.

And this is a 2016 literature survey on Successful Ageing by the same Westendorp and co-workers.

Consider a 92 years old widow who has never been ill (except probably in childhood), remembers everything, talks with pleasure, has lived alone in her home up to her 91, but is now in a nursing home because of the risks to fall down. She looks happy and laughs easily but prays every day to be llowed to die during the next night hoping to see her husband again. And consider now a 70 years old brilliant physicist who made top level discoveries but caught Amyotrophic Lateral Sclerosis in his 20’s and can nearly not move nor speak since many years. However he is still lecturing and publishing thanks to extensive help and technical means.

Which one enjoys the most successful ageing ?

Similar to ageing which is multi-factorial, successful ageing is multi-factorial. And to encode all ( ?) the factors in a scale taking account of all ( ?) weights corresponding to all ( ?) various life situations and histories is certainly not a small challenge !

Guibert certainly your comments are more than enlightening remarks . I appreciate that . I just retrieved the review on successful aging from

Sasmita Kusumastuti and I'll eagerly go through it-

Thank you very much..

Kasper Jørgensen    I´ll read this article it sounds good...thank you

Theodore D Cosco, you are perfectly right I need to focus more in my research question , Thank you.

Thank you Ernesto for your contribution to make clearer this confused term. Indeed your suggested article renders a better picture of what  factors are prospectively associated with subsequent successful  aging. Saludos

Ahmed Negida, thank for you comments

Thanks all of you...

The World Congress on Active Ageing takes place in Melbourne, Australia later this month. It's a 4-day conference covering the whole spectrum of physical, cognitive, social wellbeing in older persons, as revealed by quantitative and qualitative research. There will surely be some relevant publications emanating from that, and useful contacts among the speakers. Google it - they have a good website.  

Thank you Sue I will do it!!