TOPICS-MDS is a collation of validated instruments measuring physiological, psychological and social health and wellbeing of older persons and informal caregivers across the Netherlands. More background information on the development of the survey instrument can be found in the following paper:
Lutomski JE, Baars MAE, Schalk BWM, Boter H, Buurman BM, den Elzen WPJ, Jansen APD, Kempen GIJM, Steunenberg B, Steyerberg EW, Olde Rikkert MGM, Melis RJF. The development of The Older Persons and Informal Caregivers Survey Minimum DataSet (TOPICS-MDS): A large-scale data sharing initiative. PLoS ONE. 2013 Dec 4;8(12):e81673. doi: 10.1371/journal.pone.0081673.
In 2017 the TOPICS-MDS has been optimized in a expert group (chair: Dr. Silke Metzelthin). For a detailed description of the changes made in the MDS, see (in Dutch): TOPICS-MDS 2017-aanpassingen