Table 1 Cut‐off levels used for categorisation of performance below normal cognitive function, walking ability, manual dexterity, dependency in activities of daily living, frequency of social or lifestyle activities below normal and sense of coherence.

Variable	Questionnaire/instrument	Criteria
Cognitive function	Symbol Digit Modalities Test	Age‐related norms, written or oral reply,−1.5 SD21
	Free recall portion of the Free Recall and Recognition of 12 Random Words Test	Age‐related/sex‐related norms, −1 SD32
Walking ability	Walking speed 10 m (5×2)	Age‐related/sex‐related norms, −1 SD33
Manual dexterity	Nine‐Hole Peg Test	<0.5 pegs/s34
ADL	Barthel Index	<100
	Katz‐Extended ADL Index	Dependent in one or more items
Frequency of social or lifestyle activities	Frenchay Activities Index	Age‐related/sex‐related norms, < lower quartile35
SOC	Sense of coherence scale	Weak SOC: 13–54 points; moderate‐–strong SOC: 55–91 points30

ADL, activities of daily living.