Theoretical and empirical dimensions of the Aberdeen Glaucoma Questionnaire: a cross sectional survey and principal component analysis

Prior, Maria; Ramsay, Craig R; Burr, Jennifer M; Campbell, Susan E; Jenkinson, David J; Asoaka, Ryo; Francis, Jillian J

doi:10.1186/1471-2415-13-72

Table 6 Mapping process for labelling the 7 empirical factors

From: Theoretical and empirical dimensions of the Aberdeen Glaucoma Questionnaire: a cross sectional survey and principal component analysis

Factor no.	AGQ item content	ICF codes assigned to items during pre-validation phase (theoretical structure)	Factor label
Factor 1	Does your eyesight interfere with your recognising or meeting people?	b210 ‘seeing’ functions, d9205 socialising.
	Do you have difficulty watching television? (appreciating the pictures).	d110 watching
	Do you have difficulty reading subtitles for film or TV?	d166 reading	Seeing Functions: Participation
	Do you have difficulty reading traffic signs, street signs, or store signs?	d166 reading
	Do you tend to confuse colours?	b21021 colour vision
	Do you have difficulty finding something on a crowded shelf?	b210 implicit
Factor 2	How much does your eyesight interfere with using public transport on your own? (for instance bus, train or plane).	b210 ‘seeing’ functions, d4702 using public motorised transportation, e540 transportation services, systems & policies.
	Because of my eyesight I need help from family or friends.	b210 ‘seeing’ functions, e310, e315, e320 (physical and emotional support from immediate family, extended family, friends).	Moving Around & Communication
	Because of my eyesight I have to rely on what other people tell me.	b210 ‘seeing’ functions, d310-329 communication - receiving (non-verbal messages, written messages).
	Because of your eyesight, do you have difficulty going out of your home alone?	b210 ‘seeing’ functions, d4602 moving around outside the home & other buildings.
	Do you use assistance to get around? (e.g. a guide dog, cane, companion).	d465 moving around using equipment, e115 products & technology for personal use in daily living.
Factor 3	Do you worry about your eyesight getting worse?	b152 emotional function, b210 ‘seeing’ functions
	Does your eyesight make you concerned or worried about coping with everyday life?	b152 emotional function, b210 ‘seeing’ functions
	Do you feel like a nuisance or a burden because of your eyesight?	b152 emotional function, b210 ‘seeing’ functions	Emotional function
	Do you feel embarrassed because of your eyesight?	b152 emotional function, b210 ‘seeing’ functions
	Do you feel frustrated or annoyed because of your eyesight?	b152 emotional function, b210 ‘seeing’ functions
Factor 4	Because of your eyesight do you bump against other people in crowded areas?	b210 seeing functions, d4503 walking around obstacles	Walking around obstacles
	Do you bump into people or objects while walking?	d4503 walking around obstacles
	Do you trip over objects?	d4503 walking around obstacles
Factor 5	Does your eyesight deteriorate in bright light?	b21010 light sensitivity, e240 light (e.g. light intensity, quality and colour contrasts).
	Does your eyesight deteriorate in dim light?	b21010 light sensitivity, e240 light.
	Do you have difficulty with walking down steps in dim light?	d4551 climbing (e.g. climbing steps, stairs or kerbs), e240 light.	Light
	Do you have difficulty adjusting from bright to dim light? (such as when going from daylight into a dark room)	e240 light
	Do you have difficulty with adjusting to bright lights?	e240 light
Factor 6	Because of my eyesight I need help from care services.	b210 ‘seeing’ functions, e575 general social support services, systems & policies.
	Because of your eyesight, do you have difficulty entertaining friends and family in your home?	b210 ‘seeing’ functions, d9205 socialising.	Seeing Functions: Domestic & Social Life
	When pouring liquid, do you have difficulty judging the level of the liquid in a container, such as the level of a cup of coffee?	d630 household tasks.
	Do you have difficulty seeing how people react to things you say?	b210 ‘seeing’ functions, d3150 communication - receiving non verbal messages (body gestures)
Factor 7	In the last 12 months have you been anxious or worried about falling? (This may or may not be associated with a feeling of unsteadiness).	b152 emotional function, d4 mobility (general).	Mobility
	Have you fallen in the last 12 months?	d410-429 changing & maintaining body position.
	Do you have difficulty with walking on uneven ground?	d4502 walking on different surfaces.

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