socpop Flashcards
(191 cards)
What is statistical normality?
Based on the normal (Gaussian) distribution that 95% of the population should be within ± 2 standard deviations of the mean
What is social normality?
What society finds acceptable or desirable. Changes within a given society, culture, and time.
What is optimal normality?
‘Normal’ value is determined by what is required for optimal health, not the mean/median of a population e.g. BMI, vitamin D, glomerular filtration rate
Define illness
Subjective experience, varying between people, is personal. One can be ill in the absence of disease.
Define sickness
A social role adopted or assigned to a person perceived to be ill.
Define disease
Objective diagnosis using specific signs and symptoms. Deviation from the biological norm. Changes with medical advances.
What is the medical model and criticisms of it?
Health stems from biology and is the absence of disease. Medical model therefore shows that it is the health profession’s job to cure or treat to lessen symptoms. Causes of ill health can be identified by signs and symptoms
criticisms: Power is in the hands of the medical profession, rather than patients and their autonomy. It doesn’t include chronic disease for which there is no cure or association with a simple biological cause. It doesn’t consider the social influences on health.
What are the key features of the social model?
- Health is a social construction and is determined by a range of external factors.
- It is determined by the social and cultural, socioeconomic influences of a person and is therefore not confined to biological factors.
- A need for interventions at the population level
- Takes into account lay knowledge and beliefs, places people at the centre
- Recognises that a person can have a disease or an impairment but still consider them self healthy
What is the WHO definition of health?
A state of complete social, physical and mental wellbeing and not merely the absence of disease or infirmity.
Health as absence from disease.
Health as functionality (ADLs.)
Health as freedom.
Health as an equilibrium.
Define prevalence and what are the 3 types
A measure of how common a disease is, as a proportion. (% or number in 1000/10000 etc.)
P= (no. people with disease/total number of people) x 100 (for a %) or x 1000/10000 etc.
Prevalence is good at gauging the burden of disease, but can be affected by the duration of the disease.
3 types are point, period, lifetime
Define incidence
The rate at which new events occur in a population, over a defined period of time. Either expressed as per n people of n years, or as n-person years
Incidence = (number of new cases)/(no. people observed x years observed) x units (eg, 1000 for per 1000 people etc)
What are the factors that affect prevalance?
- incidence rate
- recovery rate
- death rate
- transfer (migration) rate
Define 95%/99% confidence intervals
This is a range of plausible values within which we can be 95%/99% confident the true value lies.
e.g. “In our study, we found that 80% of mothers hold their baby on the left.
A 95% confidence interval is 75% to 85%.”
You can be 95% confident that, in reality, somewhere between 75% and 85% of new mums hold their baby on the left.
or
The true proportion of mothers who hold their baby on the left is plausibly between 75% and 85%
How do you calculate confidence interval?
first calculate p, then the SE (equation given) then…
CIs= p ± (1.96*SE.)
What is the use of confidence intervals?
Width of the CI indicates how accurate our data is. The larger the sample size, the narrower the range of CI, which is more reassuring. A wide confidence interval means you cannot be precise about the truth.
If CI from different samples overlap, it is unlikely that they are significantly different.
Define point estimate
Is our best guess based on sample data
Define sampling error
is the difference between the sample point estimates and the truth. Have to test the whole population to eliminate sampling error or test a larger sample to reduce error.
What does a P value indicate?
a number somewhere between 0 and 1. A small P value indicates strong evidence against the null hypothesis, so you reject the null hypothesis. (The null hypothesis assumes that there is no difference between the groups.)
Define demography
The study of the size, structure, dispersement and development of human populations
Define census
The simultaneous recording of demographic data by the government at a particular time, pertaining to all the persons living in a particular territory (UN). Describes both households and people/.
Outline history and process of census taking
UK census: every 10 years, legal requirement. Taken since 1841. Next one is 2021. 98% coverage but some low enumeration groups. Data goes to the Office of National Statistics.
Data in UK census includes demographic data (age/sex), cultural characteristics (ethnicity/religion) material deprivation (employment, home ownership, overcrowding, lone parents), health, workplace and journey to work.
What is the UK census used for? (3 points)
- Measurement and demographics of material deprivation. (identify and target inequalities)
- Baseline population size and structure estimate. (Rates of birth and death)
- Service requirements based on demographics (age, ethnicity etc.)
What is the CARTA framework?
Completeness, Accuracy, Reliability, Timeliness and Accessibility.
Outline the process of birth registration
- Birth notification: by birth attendant (usually midwife) within 36 hours to health authority (child health record, health visitor)
- birth registration by parents within 42 days
- local registrar for births, marriages and deaths
- office for national statistics - birth statistics