Qualitative methodology - interviews, narrative discourses, focus groups
- Analyze data in a lot of depth → good insights but cannot be generalizable
Quantitative data - US census bureau, poverty rate
- Country typically collects data for a national system → population statistics
How does one measure disability in population based surveys?
Assessments by survey staff (trained researchers)
Self-reports - ask individuals / household respondents
Self-identification: “Do you have a disability?”
- Problematic because there is no agreed upon definition and some people may be apprehensive to say yes due to stigmas
Impairment measures: individuals are queried about impairments that might include blindness, deafness, developmental disability, stammering and stuttering, complete or partial paralysis
- Reinforces the conception that disability is rare
- Limited sight does not count as blindness → only captures more extreme ones
Health conditions - some surveys ask if respondents have specific health conditions
- Health conditions may be temporary or chronic, physical or mental, life threatening or not, infectious or non-communicable
- Some people may not have access to healthcare, which is necessary to receive a proper diagnosis
- Stigmas associated with some health conditions
- Instead of asking about diagnoses, they try to develop questionnaires that can diagnose through respondents answers
Functional limitations - difficulties experienced with particular bodily functions such as seeing, hearing, speaking
- Issue of the proxy - proxy may not know the situation of every household member
- Resources can change the answers people give
- Ex: someone with glasses may not say they have seeing issues because they have accommodations
- There is a subjective element
Broad activity limitations - lost days of normal activity due to ill-health in the past six months or year
Is normal activity limited? (education, work)
The question does not go in depth or account for changes in health conditions / school environments / etc…
ADLs - Activities of Daily Living
- Basic ADLs - fundamental for functioning and include self-care activities such as feeding oneself, dressing, using the bathroom without help
- Intermediate ADLs - physically more demanding
- Complex ADLs
- ADLs are adapted to different contexts
- Ex: in NYC you would not ask someone if they could draw a pail of water from a well
Washington Group on Disability Statistics set of questions has become prevalent → a group of stakeholders within the UN
- Main point is having questions that can be applicable to multiple countries
- Questions cover functional limitations in:
- Seeing
- Hearing
- walking/climbing steps
- Self care
- concentrating/remembering
- Communicating
- Each question has a four point scale (no difficulty, cannot do)
- Graded answer scale tries to determine severity
- Asks questions solely in the context of health conditions
Disability Adjusted Life Years (DALYs)
- DALYs combine years lost from premature mortality with the loss experienced by living with a disability
- Expressed as a unit of time
- Calculated by multiplying years spent living with a disabling condition that results from a particular disease or injury by an associated disability weight
- Ex: a woman acquires a chronic illness that leads to her living 10 years with a condition that has a disability weight of 0.4 and then dying 10 years prematurely
- Her loss in health would be 14 DALYs – the sum of the 10 years lost of life and four years lost (10 x .4) from a disabling condition
- DALYs are an effort to develop data on the consequences of health conditions
- Primary drive is prevention (medically focused)
- Inform policy makers – ex: we should spend money on HIV because HIV has high DALYs
Direct measurements - asks people to report if they are limited in their opportunity or achievements / activities due to an impairment / health condition
- Ex: how does your environment limit xyz (direct measure of social model)
- Broad activity questions are difficult to understand why someone may be limited–environmental barriers, health conditions, pain, mental state, etc… (capabilities approach)
- Direct measurement approach is convenient (1 question that takes little space), but is not always insightful
Indirect measurement - identifying people with impairments or health conditions, and the subset who are well being deprived
- Isolating a population that is at risk of having human rights limited
- Within the group, you determine whether or not that risk came into fruition (do they have jobs, go to school, etc…)
Calculating Disability Prevalence - Adjusted v. Unadjusted
- Unadjusted prevalence - a simple count of people with disabilities in a population
- Adjusted prevalence - accounts for factors like age, sex, and socioeconomic status to provide a more accurate comparison across different populations
- Some populations naturally have higher unadjusted disability rates due to ages in distribution
- Example:
- Country A has an older population → Higher disability prevalence (since disability is more common among older individuals)
- Country B has a younger population → Lower disability prevalence (fewer disabilities among younger individuals)
- This doesn’t necessarily mean Country A has more disability overall—it just has more older people
- Global weighting - ensures that differences in prevalence are due to actual disability rates, not demographic differences
- Factors impacting disability prevalence - Age, race, and socioeconomic status influence prevalence