Measuring functional status

Quality of self-reported measures of functional status

In the Zutphen Elderly Study, self-reported functional status was measured with the self-administered 13-item WHO-questionnaire on Activities of Daily Living. A hierarchic disability-scale was constructed based on basic activities of daily living (e.g. walking indoors), mobility-related (e.g. moving outdoors) and instrumental activities of daily living (e.g. preparing meals). The reproducibility of self-reported disabilities was fair to good.

Quality of the performance-based measures of functional status

Performance-based measures of functional status are more objective than self-reported measures. A score from performance-based limitations was based on the results of four tests: standing balance, walking speed, ability to rise from a chair, and external shoulder rotation. Three of the four performance tests were highly reproducible, the shoulder rotation test was not.

About the Zutphen Elderly Study

The Zutphen Elderly Study is an extension of the original Zutphen Study with a sample of the same age where detailed information on the diet of all the participants was collected four times between 1985 and 2000.  Read more about the Zutphen (Elderly) Study.

More about healthy aging

From 1984 onwards, additional studies started to examine indicators of healthy ageing in the elderly populations of in the SCS and related studies.


Smoking and cardiovascular disease

An analysis using data from Seven Countries Study showed that CHD mortality was 5% higher in men who smoked at least 10 cigarettes per day compared to those who never smoked.

Telomeres and all-cause mortality

Longer telomeres at baseline did not predict all-cause mortality, even though telomere shortening is a marker of aging that might be related to oxidative stress.