Medical Statistics Notes PDF

-Definition and functions of medical statistics -Definition and types of data -Definition and methods of data collections  Medical statistics Definition: is the science of Analyzing Collecting Presenting and...

-Definition and functions of medical statistics -Definition and types of data -Definition and methods of data collections  Medical statistics Definition: is the science of Analyzing Collecting Presenting and interpreting Data in medical practice Using them to estimate the magnitude of associations and test hypotheses.  Medical statistics Presentation of data in a definite and simple form Comparison of Diagnosis of a health status: of Functions health problem different areas, and of in the in one area at statistics community different times. Evaluation of any health program  Medical statistics Definition of data: Set of values of one or more variables recorded in one or more observational units OR numerical description of quantitative or qualitative aspects of things. Types of data: Ex. number of chromosomes  Medical statistics Types of variables:  Medical statistics Types of variables: Variables  Medical statistics Types of quantitative variables: Continuous Discrete or quantitative variable discontinuous quantitative variable a. Always obtained by a. Always obtained by measurement numeration. b. The values may take the b. The values take the form of integer figures or fractions integer figure (no fractions): e.g.: weight, height, blood sugar, e.g. blood cells, number of urea, blood cholesterol, Hb %. microbes /cc, respiratory rate, number of beds in a hospital.  Medical statistics Types of qualitative variables:  Medical statistics Types of qualitative variables: Nominal Ordinal / rank Variables whose categories cannot be put Variables whose categories could be in any order arranged in a definite order e.g.: e.g 1. Sex:(male or female) 1-Educational level:( illiterate, basic 2.Marital status: (single, married, divorced, education, secondary, university) Widowed). 2-Socioeconomic status:(high, middle, 3. Blood groups: (A, B,AB,O) low). 4. Color of skin 5. Color of the eye 6. Religion.  Medical statistics Sometimes: qualitative one Blood pressure Normotension(120/80) (Expressed in numbers) Hypertension(180/100) Hypotension(100/60) Quantitative variables  Medical statistics Data collections: Definition: is the process of gathering and measuring information on targeted variables in an established systematic fashion, which then enables one to answer relevant questions and evaluate outcomes. Medical statistics Historical Experiments records Conducting surveys Methods of data collections  Medical statistics Methods of data collections: 1-Historical records: e.g. a. Censuses b. Vital statistics records c. Epidemiological records d. Scientific journals and textbooks 2- Experiments:  Medical statistics Methods of data collections: 3-Conducting surveys: A-Comprehensive Surveys: -The data are collected from every member in the community. -Used for a small community e.g. a school, a village or a factory. B- Sample survey: -The sample must be representative. -Sample is collected from the population and the required data are collected from the sample members. Then, the results can be generalized over the whole population. 1. Identify the difference between quantitative data? 2- Enumerate the types of survey?