Table 1.

EDAD 2008 items of potential interest and those finally selected for ICF backcoding*.

ICF Checklist variables	EDAD 2008 variables considered (regardless of selection)		EDAD 2008 item used
Short list of activity and participation domains	Variable	Content of EDAD 2008 variables	Capacity	Performance
d1. Learning and applying knowledge
d110 Watching	APR_14	to hold a gaze or pay attention when listening	14.2	14.2
d115 Listening	APR_14	to hold a gaze or pay attention when listening	14.2	14.2
d140 Learning to read	APR_15	to learn to perform simple tasks	15.2	15.2
d145 Learning to write	APR_15	to learn to perform simple tasks	15.2	15.2
d150 Learning to calculate	APR_15	to learn to perform simple tasks	15.2	15.2
d175 Solving problems
d2. General tasks and demands
d210 Undertaking a single task	APR_16*	to perform simple tasks	16.2	16.3.bpt
d220 Undertaking multiple tasks	APR_17*	to perform complex tasks	17.2	17.3.bpt
d3. Communication
d310 Communicating with -- receiving -- spoken messages	COM_9*	to understand the meaning of what other persons say	9.2	9.3.bp
d315 Communicating with -- receiving -- non-verbal messages	COM_11*	to understand and express yourself via gestures, symbols, illustrations or sounds	11.2	11.2
d330 Speaking	COM_8*	to speak intelligibly or utter coherent phrases	8.2	8.3.bt
d335 Producing non-verbal messages
d350 Conversation	COM_12*	to hold a dialogue and exchange ideas with one or more persons	12.2	12.2
d4. Mobility
d430 Lifting and carrying objects	MOV_24*	to lift or carry objects	24.2	24.3.bpt
d440 Fine hand use	MOV_26*	to lift or carry small objects	26.2	26.3.bpt
d450 Walking	MOV_20*m	to walk and move inside the home	20.2	20.3.bpt
	MOV_21*m	to walk and move around the home	21.2	21.3.bpt
d465 Moving around using equipment
d470 Using transportation	MOV_22*	to get around via passenger transport	22.2	22.3.bpt
d475 Driving	MOV_23*	to drive vehicles	23.2	23.3.bt
d5. Self-Care
d510 Washing oneself	AUT_27*	to wash or dry different body parts	27.2	27.3.bpt
d520 Caring for body parts	AUT_28*	to perform basic grooming	28.2	28.3.bpt
d530 Toileting	AUT_29max	to carry out activities related to urination	29.2	29.3.bpt
	AUT_30*max	to carry out activities related to defecation	30.2	30.3.bpt
	AUT_31*max	to carry out activities related to menstrual care (only for women)	31.2	31.3.bpt
d540 Dressing	AUT_32*	to dress or undress	32.2	32.3.bpt
d550 Eating	AUT_33	to eat and drink	33.2	33.3.bpt
d560 Drinking	AUT_33	to eat and drink	33.2	33.3.bpt
d570 Looking after one's health	AUT_34*max	to follow medical prescriptions	34.2	34.3.bpt
	AUT_35*max	to avoid dangerous situations	35.2	35.3.bpt
d6. Domestic life
d620 Acquisition of goods and services	VDOM_36*	to do shopping	36.2	36.3.bpt
d630 Preparation of meals	VDOM_37*	to prepare meals	37.2	37.3.bpt
d640 Doing housework	VDOM_38*	to carry out housework	38.2	38.3.bpt
d660 Assisting others
d7. Interpersonal interactions and relationships
d710 Basic interpersonal interactions	INTER_39*	to show other persons affection, respect or transmit feelings	39.2	39.2
d720 Complex interpersonal interactions
d730 Relating with strangers	INTER_40*	to relate to strangers	40.2	40.2
d740 Formal relationships	INTER_41*	to initiate and maintain relations with subordinates, peers or superiors	41.2	41.2
d750 Informal social relationships	INTER_42*	to initiate and maintain relations with friends, neighbours, acquaintances or colleagues	42.2	42.2
d760 Family relationships	INTER_43*	to initiate and maintain family relations	43.2	43.2
d770 Intimate relationships	INTER_44*	to initiate and maintain intimate or sexual relations	44.2	44.2
d8. Major life areas
d810 Informal education d820 School education d830 Higher education	F_1	Level of studies completed
	F_2	In relation to your finished studies, what is your diploma degree or graduate degree?
	F_3	In the last five years, have you done any vocational training course?
	G_1	In relation to education and school integration, what was your situation last week?
d850 Remunerative employment	E_1	Due to the onset or worsening of your disability, have you had to amend your relationship with economic activity or your occupation?
	E_5	Relation with economic activity in the past week.
	E_6	Have you worked at some point as an employee or freelance worker?
	E_15	Professional situation
	E_20	Why did you stop working?
d860 Basic economic transactions
d870 Economic self-sufficiency	F_3a	What is the monthly amount of the total income for this household?
d9. Community, social and civic life
d910 Community Life	H_2_11	In the last 12 months, have you felt discriminated against on the basis of your disability in any of the following situations? In social participation
	H_2_12	In the last 12 months, have you felt discriminated against on the basis of your disability in any of the following situations? In social relations
	I_4_2	Have you had any opportunities in the last 12 months? Relating with friends or persons who are close
d920 Recreation and leisure	I_5_2	What activities do you spend most of your spare time on, and which would you like to carry out for enjoyment or recreation that you do not already, due to your disability? Please select the three main activities in both columns.
d930 Religion and spirituality
d940 Human rights
d950 Political life and citizenship	H_2_7	In the last 12 months, have you felt discriminated against on the basis of your disability in any of the following situations? - Public Administration

Where applicable, the item for difficulty involved in activities undertaken with technical or personal aid was taken as performance. Variables not marked with an asterisk and having their content shown in italics were excluded from backcoding, either from an interim list by two authors acting in consensus, or after reviewers' comments and consideration by an ICF expert. Spaces left blank indicate no EDAD 2008 item was deemed appropriate for ICF coding. Domains totally devoid of items considered valid for backcoding (d1) or represented by single EDAD 2008 items (d8,d9) were dropped from further analysis and results

As the extra question for performance was not always asked, the columns entitled "capacity" and "performance" show the number of the item from which the information was taken.

^aThis item is taken from the household instead of the disability questionnaire.

^P = personal assistance,^t = external technical aid,^pt = personal assistance or technical aid.

When there was more than one item linked to an ICF category the mean^m or the maximum^max of these items was used.