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Table 1 Harmonization of items and response options from the FAQ, ECog, and A-IADL-Q

From: Decline in cognitively complex everyday activities accelerates along the Alzheimer’s disease continuum

Harmonization

FAQ

ECog

A-IADL-Q

Cohort(s)

ADNI, NACC

ADNI, HABS

ADC, EMIF pre-AD and 90+

Item content

 Hot beverages

Heating water, making a cup of coffee, turning off the stove

Using the coffee maker

 Paperwork

Assembling tax records, business affairs, or other papers

Keeping financial records organized

Managing their household paperwork

Response options

 Normal (4)

Normal (0)

Better or no change (1)

No more difficult (0)

 Slightly worse (3)

Has difficulty, but does by self (1)

Questionable/occasionally worse (2)

Slightly more difficult (1)

 Worse (2)

Consistently a little worse (3)

More difficult (2)

 Much worse (1)

Requires assistance (2)

Much more difficult (3)

 Unable (0)

Dependent (3)

Consistently much worse (4)

No longer able to perform this task (4)

  1. Abbreviations: ADC Amsterdam Dementia Cohort, ADNI Alzheimer’s Disease Neuroimaging Initiative, A-IADL-Q Amsterdam Instrumental Activities of Daily Living Questionnaire, ECog Everyday Cognition, EMIF European Medical Information Framework, FAQ Functional Activities Questionnaire, HABS Harvard Aging Brain Study, NACC National Alzheimer’s Coordinating Center