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Absolute risk reduction (ARR)
The difference in the event rate between control group (CER) and treated group (EER): ARR = CER – EER.
Used when randomising participants to treatment groups in an RCT. Allocation is concealed when neither the participants nor the researchers know or can predict to which group in a study (control or treatment) the patient is assigned. Allocation concealment takes place before the study begins as patients are being assigned. It is a sign of a robust study.
AMED (Allied and Complementary Medicine Database)
A unique bibliographic database produced by the Health Care Information Service of the British Library. It covers a selection of journals in complementary medicine, palliative care, and several professions allied to medicine. Covers the years from 1985 to present and is updated monthly.
To examine associations between variables—these may be hypothesised causal or therapeutic relations.
A statistical dependence between two or more events, characteristics or other variables. An association may be fortuitous or may be produced by various other circumstances; the presence of an association does not necessarily imply a causal relationship
Average – Mean, Median, Mode – ways of expressing a central tendency
- Mean – The average value, calculated by adding all the observations and dividing by the number of observations.
- Median – Middle value of a list. If you have numbers 2, 3, 4, 5, 6, 7, and 8, the median is 5. Medians are often used when data are skewed, meaning that the distribution is uneven. In that case, a few very high numbers could, for instance, change the mean, but they would not change the median. Other definitions include the smallest number such that at least half the numbers in the list are no greater than it. If the list has an odd number of entries, the median is the middle entry in the list after sorting the list into increasing order. If the list has an even number of entries, the median is equal to the sum of the two middle (after sorting) numbers divided by two. The median can be estimated from a histogram by finding the smallest number such that the area under the histogram to the left of that number is 50%. But all mean the same thing in the end.
- Mode – For lists, the mode is the most common (frequent) value.
Any tendency to influence the results of a trial (or its interpretation) other than the experimental intervention.
A technique used in research to eliminate bias by hiding the intervention from the patient, clinician, and/or other researchers who are interpreting results.
BNF (British National Formulary)
The buy accutane online australia provide UK healthcare professionals with authoritative and practical information on the selection and clinical use of medicines (includes BNF for Children).
Bristol Health Partners
The best place to buy accutane is a collaboration between the city’s three NHS trusts, three clinical commissioning groups, two universities and its local authority. They aim to maximise Bristol’s health research, and transform the understanding, prevention and treatment of key health problems in Bristol.
The observational epidemiologic study of persons with the disease (or other outcome variable) of interest, and a suitable control (comparison, reference) group of persons without the disease. The relationship of an attribute to the disease is examined by comparing the diseased and non-diseased with regard to how frequently the attribute is present or, if quantitative, the levels of the attribute, in each of the groups.