English Dra. Conceição systems..(1).pptx

English Dra. Conceição systems..

1. Republic of Angola Ministry of Health Cabinda General Hospital DEPARTMENT OF MEDICAL RECORDS AND STATISTICS DESCRIPTIVE STATISTICS

2. INTRODUCTION . The etymology of the word Statistics, which comes from the Latin status (position, state or situation), was initially used in the collection and presentation of quantitative data of interest to the state. Statistics : Refers to numerical data. Statistics: is the science that is responsible for collecting, organizing, presenting, analyzing and interpreting numerical data.

3. DESCRIPTIVE STATISTICS Descriptive Statistics: Analyzes and represents a group of data, using numerical and graphical methods that summarize and present the information.

4. GOALS:   Describe the behavior of the observed data. Allows you to examine the important characteristics of the identified data.

5. VARIABLES Variable: is a characteristic that can be measured within the units of analysis that are studied, which can have different values or degrees of intensity, depending on what the unit of measurement will be. All the things that surround us can be a variable : EX: Colors of things, height of buildings, sex, number of cars that pass through an area, countries that have won a World Cup (These are variables because they take on different values)

6. Classification of variables: 1- Qualitative Within the qualitative ones we find the nominal and the ordinal: Nominal qualitative variable: When we refer to color, sex. Ordinal qualitative variable: A patient's health status. (Mild, moderate and severe) The qualitative variable can be: Dichotomous and Polytonic  

7. Dichotomous: when it presents two values. Ex: sex. (F and M) Polytonic : when it presents more than two values Ex: marital status. 2- Quantitative Within the quantitative we find the discrete and the continuous: Discrete: Number of children, beds. Continued: Age and height.

8.     UNIVERSE AND SAMPLE Universe or population : It is a large set or group of people who have at least one characteristic in common that can be measured. Sample: It is the subgroup of the population that the researcher takes to be able to reach conclusions about it and make an estimate on it.

9. EXERCISES 1- To determine whether the DAVIXOL medicine produced by the TANDU FARMA medicine factory has adequate quality, 200 Lazar blades were removed from production carried out in January 2024. Determine the universe and sample of this study. 2- A group of researchers wishes to study the behavior of Malaria and HIV in the Province of Cabinda during the year 2022-2023, for the same study they decided to work with the population of the two municipalities of the Province in order to carry out some relevant examinations. a) State what the population and sample will be for this study.

10. SCALES Scales can be: Exhausting and Excluding you. Exhaustive: When it allows classifying all units of analysis. Exclusive: When allowing a unit of analysis to be in a single category. Scales can be qualitative or quantitative. Qualitative (ordinal nominals) Quantitative (interval, ratio and proportion) The scales are composed of (IC) which gives us the limit of each class (larger numbers and smaller numbers) and can be closed or open.

11. EXERCISE 1- On February 22, 2024, the Internal Medicine service treated 20 patients with the following ages: 20, 22, 24, 25, 26,27,60,28,33,40,44,24, 50,30,31,35,45,44,37,32 . Organize this information on a quantitative scale with an interval of equal amplitude. Find the lower and upper limits of each class.  Recurred ( R ) = 60-20= 40 We want a minimum of 4 class breaks The amplitude of the intervals A= 40 /4= 10

12. FREQUENCY DISTRIBUTION Frequency Distribution : is the way in which the analysis units are distributed between classes or categories that make up the classification scales of the variable in question. Frequency distributions are classified into: Absolute Relative Accumulated (relative and absolute)

13. DEFINITIONS Absolute Frequency: is the result of counting the cases or observations (number of observations).   Relative Frequency: is the relative importance or weight that the units of analysis or a class have over the total number of units. (It is calculated by dividing the absolute frequencies and if you multiply by 100 you will obtain the percentage)   Accumulated Frequencies: These are the absolute or relative frequencies that accumulate up to a given class interval. (It is calculated by adding the absolute or relative frequencies, depending on what you need

14. EXERCISE Study time Number Relative frequency Cumulative frequency Years Absolute frequency Proportion % Absolute Proportion % < 1 year 41 two 115 3 304 5 437 Total 897 -------- ---------- -------- 1- In a study on the risk of specialist interns at the Cabinda General Hospital giving the correct diagnoses. a) Fill in the table below.

15. REFLECTION DATA QUALITY It is not enough to have access to patient data, it must be reliable, complete and represent the individual's real history and health condition. Only then will the data be useful in clinical decision-making.

16. THANK YOU FOR THE ATTENTION PROVIDED