Phương Pháp Nghiên Cứu Y Tế (Mô-đun Đào Tạo 2)

Phương pháp nghiên cứu sức khỏe trong y học giúp cải thiện chất lượng chăm sóc sức khỏe và phát triển các liệu pháp điều trị hiệu quả.

• Người hướng dẫn: Yemane Teklai
• Trường học: Ethiopian Science and Technology Commission
• Chuyên ngành: Health Research Methods
• Đề tài: Phương Pháp Nghiên Cứu Y Tế: Hướng Dẫn Toàn Diện
• Loại tài liệu: Training Module
• Năm xuất bản: 2005
• Địa điểm: Addis Ababa

Mục lục chi tiết

• PREFACE
• ACRONYMS
• GLOSSARY
• 1. INTRODUCTION
• 1.1. Objectives of the module
• 1.2. Selection of study design
• 1.3. Observational versus Experimental (Intervention) studies
• 1.4. The randomized clinical trial (RCT)
• 1.5. Community intervention trials (CITs)
• 1.6. Sampling Methods and Sample Size
• 1.6.1. What is sampling
• 1.6.2. Simple random sampling
• 1.6.3. Multi-stage sampling
• 1.6.4. How large a sample?
• 1.7. Data collection techniques
• 1.7.1. Utilization of available data
• 1.7.2. Self administering written questionnaires
• 1.7.3. Focus Group Discussion
• 1.8. Bias in Information Collection and its possible causes
• 1.9. Effect of the Interviewer on the Informant
• 1.10. Importance of Combining Different Data Collection Techniques
• 1.11. Variables and measurement errors
• 1.11.1. What is a variable?
• 1.11.2. Defining variables and indicators of variables
• 1.11.3. Dependant and Independent variables
• 1.11.4. What is validity and reliability?
• 1.12. Qualitative Research Methods
• 1.12.1. Why Use Qualitative Research?
• 1.12.2. How is Qualitative research used?
• 1.12.3. Characteristics of qualitative research
• 1.12.4. Design questions in qualitative research
• 1.12.4.1. Defining an area of inquiry
• 1.12.4.2. Stating the research problem
• 1.12.4.3. Developing conceptual framework
• 1.12.4.4. Formulating qualitative research questions
• 1.12.5. Relevant concepts for designing qualitative research
• 1.12.6. The human research instrument
• 1.12.7. Saturation or redundancy
• 1.12.8. Sampling strategies in qualitative research
• 1.13. Self-Assessment questions
• 1.14. Answers to self-assessment questions
• 1.15. References and further reading

Tóm tắt

I. Tổng Quan Về Phương Pháp Nghiên Cứu Y Tế Hướng Dẫn Cơ Bản

Phương pháp nghiên cứu y tế là một lĩnh vực quan trọng trong việc phát triển các can thiệp y tế hiệu quả. Nó bao gồm việc thu thập, phân tích và diễn giải dữ liệu để giải quyết các vấn đề sức khỏe cộng đồng. Việc hiểu rõ các phương pháp này giúp các nhà nghiên cứu và chuyên gia y tế đưa ra quyết định chính xác hơn trong việc cải thiện sức khỏe cộng đồng.

1.1. Định Nghĩa Phương Pháp Nghiên Cứu Y Tế

Phương pháp nghiên cứu y tế là quy trình hệ thống nhằm thu thập và phân tích dữ liệu liên quan đến sức khỏe. Nó bao gồm các phương pháp định lượng và định tính, giúp hiểu rõ hơn về các vấn đề sức khỏe.

1.2. Tầm Quan Trọng Của Nghiên Cứu Y Tế

Nghiên cứu y tế đóng vai trò quan trọng trong việc phát triển các can thiệp y tế hiệu quả. Nó giúp xác định các yếu tố nguy cơ và đánh giá hiệu quả của các phương pháp điều trị.

II. Các Thách Thức Trong Nghiên Cứu Y Tế Những Vấn Đề Cần Giải Quyết

Nghiên cứu y tế đối mặt với nhiều thách thức, từ việc thu thập dữ liệu chính xác đến việc đảm bảo tính khả thi và đạo đức trong nghiên cứu. Những thách thức này có thể ảnh hưởng đến chất lượng và độ tin cậy của kết quả nghiên cứu.

2.1. Khó Khăn Trong Việc Thu Thập Dữ Liệu

Việc thu thập dữ liệu chính xác là một trong những thách thức lớn nhất trong nghiên cứu y tế. Các yếu tố như thiên lệch trong thông tin và sự không hợp tác của người tham gia có thể làm giảm chất lượng dữ liệu.

2.2. Đạo Đức Trong Nghiên Cứu Y Tế

Đảm bảo tính đạo đức trong nghiên cứu y tế là rất quan trọng. Các nhà nghiên cứu phải tuân thủ các quy định và hướng dẫn để bảo vệ quyền lợi của người tham gia.

III. Phương Pháp Nghiên Cứu Y Tế Các Kỹ Thuật Chính Được Sử Dụng

Có nhiều phương pháp nghiên cứu y tế khác nhau, bao gồm nghiên cứu quan sát, nghiên cứu can thiệp và nghiên cứu định tính. Mỗi phương pháp có ưu điểm và nhược điểm riêng, phù hợp với từng loại câu hỏi nghiên cứu.

3.1. Nghiên Cứu Quan Sát Đặc Điểm Và Ứng Dụng

Nghiên cứu quan sát cho phép các nhà nghiên cứu theo dõi và ghi nhận các hiện tượng mà không can thiệp. Phương pháp này thường được sử dụng để xác định mối quan hệ giữa các yếu tố.

3.2. Nghiên Cứu Can Thiệp Thiết Kế Và Thực Hiện

Nghiên cứu can thiệp là phương pháp cho phép các nhà nghiên cứu can thiệp vào một nhóm để đánh giá hiệu quả của một phương pháp điều trị. Đây là phương pháp mạnh mẽ để xác định nguyên nhân và kết quả.

IV. Ứng Dụng Thực Tiễn Của Nghiên Cứu Y Tế Kết Quả Và Tác Động

Kết quả từ nghiên cứu y tế có thể dẫn đến những thay đổi quan trọng trong chính sách y tế và thực hành lâm sàng. Việc áp dụng các phát hiện này có thể cải thiện sức khỏe cộng đồng và giảm thiểu các vấn đề sức khỏe.

4.1. Tác Động Đến Chính Sách Y Tế

Các nghiên cứu y tế có thể cung cấp bằng chứng cho việc thay đổi chính sách y tế, từ đó cải thiện chất lượng dịch vụ y tế và sức khỏe cộng đồng.

4.2. Cải Thiện Thực Hành Lâm Sàng

Kết quả nghiên cứu có thể giúp các bác sĩ và chuyên gia y tế cập nhật các phương pháp điều trị mới, từ đó nâng cao hiệu quả điều trị cho bệnh nhân.

V. Kết Luận Về Phương Pháp Nghiên Cứu Y Tế Tương Lai Và Hướng Phát Triển

Phương pháp nghiên cứu y tế sẽ tiếp tục phát triển để đáp ứng nhu cầu ngày càng cao trong việc cải thiện sức khỏe cộng đồng. Các công nghệ mới và phương pháp phân tích dữ liệu sẽ mở ra nhiều cơ hội nghiên cứu hơn.

5.1. Xu Hướng Mới Trong Nghiên Cứu Y Tế

Sự phát triển của công nghệ thông tin và phân tích dữ liệu lớn đang mở ra những hướng đi mới cho nghiên cứu y tế, giúp nâng cao độ chính xác và hiệu quả.

5.2. Tương Lai Của Nghiên Cứu Y Tế

Nghiên cứu y tế sẽ tiếp tục đóng vai trò quan trọng trong việc phát triển các can thiệp y tế hiệu quả, từ đó cải thiện sức khỏe cộng đồng và chất lượng cuộc sống.

Trích đoạn nội dung tài liệu

This watermark does not appear in the registered version - http://www.com HEALTH RESEARCH METHODS (TRAINING MODULE 2) The Health Department of the Ethiopian Science and Technology Commission in collaboration with The Ethiopian Public Health Association and Regional State Health Bureaus June, 2005 Addis Ababa, Ethiopia This watermark does not appear in the registered version - http://www.com HEALTH RESEARCH METHODS (TRAINING MODULE 2) The Health Department of the Ethiopian Science and Technology Commission in collaboration with The Ethiopian Public Health Association and Regional State Health Bureaus June, 2005 Addis Ababa, Ethiopia This watermark does not appear in the registered version - http://www.com ©2005 Ethiopian Science and Technology Commission, Health Department Material from this module may be reproduced without prior permission for non-profit- making purposes only. This watermark does not appear in the registered version - http://www.com Table of Contents Table of Contents i Preface iii Acronyms v Glossary vi Introduction. 1 Objectives of the module. Selection of study design.

Observational versus Experimental (Intervention) studies. The randomized clinical trial (RCT). Community intervention trials (CITs). Sampling Methods and Sample Size.

What is sampling. Simple random sampling. Multi-stage sampling. How large a sample?.

Data collection techniques:. Utilization of available data. Self administering written questionnaires. Focus Group Discussion.

Bias in Information Collection and its possible causes .35 i Health Research Methods This watermark does not appear in the registered version - http://www. Effect of the Interview (er) on the Informant. Importance of Combining Different Data Collection Techniques.Variables and measurement errors. What is a variable?.

Defining variables and indicators of variables. Dependant and Independent variables. What is validity and reliability?. Qualitative Research Methods.

Why Use Qualitative Research?. How is Qualitative research used?. Characteristics of qualitative research. Design questions in qualitative research.

Defining an area of inquiry.2 Stating the research problem .3 Developing conceptual framework .Formulating qualitative research questions. Relevant concepts for designing qualitative research. The human research instrument. Saturation or redundancy.

Sampling strategies in qualitative research.57 Self-Assessment questions .60 Answers to self-assessment questions.63 References and further reading .67 ii Health Research Methods This watermark does not appear in the registered version - http://www.com PREFACE The last century witnessed not more than 10,000 health research and development publications about Ethiopia which have been financially and/or technically driven by foreign researchers and donors until the launching and expansion of postgraduate programs in Addis Ababa University and the issuance of Health Science and Technology policy. Health research is essential in developing evidence-based interventions that will make a difference in mitigating health problems, promoting health and ultimately improving the quality of life of the Ethiopian People. Generally, however, health research and development output in terms of quality, volume and implementation has been very low compared with other developing countries in Africa and elsewhere. To date health research capacity in terms of clear and transparent human, institutional and financial systems is not well established.

Linkages, accountabilities, responsibilities and net-workings among and between research and development institutions lack clarity and much remains to be done. Conducive, implementable and comprehensive policy, strategy and legal frameworks are not properly entrenched. This calls for serious attention and consideration by all concerned including the public, business and private sectors as well as professional and civic societies. To address this problem and its impact on the quality and volume of health research and development output the Health Department of ESTC in collaboration with the Ethiopian Public Health Association (EPHA), Regional States Health Bureaus and CDC Ethiopia has prepared this modular National Health Research Capacity Building Project.

As a package the project has 6 modules with evaluation instrument tools and training guides respectively, prepared separately for easy reference and application. The project aims to demystify the design and conduct of relevant, fundable, methodologically and ethically sound health research projects, and to promote the presentation and publication of results in scientific fora and reputable journals. These ends are to be achieved by promoting basic health research skills through a modular training approach to mid and high level Federal and Regional Health professionals drawn from government and non government organizations. This project is, therefore, believed to lay down the cornerstone for national health research capacity foundation.

The project has an in-built monitoring and evaluation mechanism to measure its outcome and impact as well as the process of its implementation in terms of countrywide fundable health projects, and publishable and presentable health research outputs in the coming three years. iii Health Research Methods This watermark does not appear in the registered version - http://www.com This module on Health Research Methods is part of the modular package addressing basic issues related to research methods and their applications in undertaking health research focusing on: · Different types of epidemiological research study designs, their uses, and limitations; · How to identify the most appropriate study designs for a particular question. · Sampling methods and sample size determination. · The use of qualitative research methods in health research.

This venture is a testimony of fruitful collaborative research capacity building based on an excellent public-private partnership between the Ethiopian Science and Technology Commission and Regional States’ Health Bureaus on one hand and the Ethiopian Public Health Association and CDC on the other. Finally, it gives me pleasure to express my heart-felt gratitude to project management committee (PMC) members namely: Dr. Teferi Gedif (ESTC), Dr. Mahadi Bekri (EPHA), Dr.

Frihiwot Berhane (EPHA), Dr. Shabir Ismail (CDC), consultants, reviewers institutions, and personalities directly or indirectly involved in the realization of this module, and strongly recommend beneficiaries to maximize their efforts to making the best use of this module and the training opportunity. Last but not the least, my appreciation goes to the secretariat staff at the Health Department of the ESTC and EPHA for their contribution in making this project a success. Sincerely yours, Yemane Teklai, PhD Head, Health Department (ESTC) and chairman of PMC iv Health Research Methods This watermark does not appear in the registered version - http://www.com ACRONYMS AIDS Acquired Immuno Deficiency Syndrome CIT Community Intervention Trial FGD Focus Group Discussion HIV Human Immuno Deficiency Virus INH Isonizid KAP Knowledge, Attitude and Practice MCH Maternal and Child Health RCT Randomized Clinical Trial STD Sexually Transmitted Diseases TB Tuberculosis VCT Voluntary Counseling and Testing v Health Research Methods This watermark does not appear in the registered version - http://www.com GLOSSARY Blinding (masking) A technique by which observers and/or subjects are kept ignorant of the group to which the subjects are assigned.

Morbidity Any departure, subjective or objective, from a state of physiological or psychological well-being. In this sense sickness, illness and morbid conditions are similarly defined and synonymous. Mortality rate An estimate of the portion of a population that dies during a specified period. Prevalence rate The total number of individuals who have an attribute or disease at a particular time or during a particular period divided by the population risk.

Point prevalence The number of persons with a disease or an attribute at a specified point in time. Period prevalence The total number of persons known to have had the disease or attribute at any time during specified period. Rate A measure of the frequency of occurrence of a phenomenon. In epidemiology, demography, and vital statistics a rate is an expression of the frequency with which and event occurs in defined population in a specified period of time.

Ratio The value obtained by dividing one quantity by another: a general term of which rate, proportion, percentages are subsets. Relative Risk The ratio of the risk of disease or death among the exposed to the risk among the unexposed. Quasi experiment A situation in which the investigator lacks full control over the allocation and/or timing of intervention but nonetheless conducts the study as if it were an experiment, allocating subjects to groups. vi Health Research Methods This watermark does not appear in the registered version - http://www.

Research Methods Introduction Definition Research is a quest for knowledge through diligent search or investigation or experimentation aimed at the discovery and interpretation of new knowledge. Research is a systematic body of procedures and techniques applied in carrying out investigation or experimentation. The health of any community depends on the interaction and balance between the health needs of the community, the health resources that are available and the selection and application of health technologies and strategies and health related interventions. It is evident that the experience and skills of the disease control managers are important to apply the available technology in an optimal manner, within the limited resources available, in order to serve the health needs of the community.

To effect investment in interventions in areas which yield the highest social returns, disease control managers require accurate and scientific information on needs, possibilities and consequences of recommended actions. This module is aimed to equip disease control managers and other related professionals at regional level with the basic knowledge on the different health research methodologies. Categories of research 1. Empirical and theoretical research The philosophical approach to research is basically of two types: empirical and theoretical.

Health research mainly follows the empirical approach, i. it is based upon observation and experience more than upon theory and abstraction. Epidemiological research, for example, depends upon the systematic collection of observations on the health related phenomena of interest in defined populations. Empirical and theoretical research complement each other in developing an understanding of the phenomena, in predicting future events, and in the prevention of events harmful to the general welfare of the population of interest.

Empirical research in the health sciences can be qualitative or quantitative in nature. In most cases, health science research deals with information of a quantitative nature. This module mainly deals with the quantitative type of research. However the qualitative research method is also briefly discussed in the last chapter of this module.

1 Health Research Methods This watermark does not appear in the registered version - http://www. Basic and applied Research can be functionally divided into basic (or pure) research and applied research. Applied research is problem-oriented, and is directed towards the solution of an existing problem. It is generally recognized that there needs to be a healthy balance between the two types of research, with the more affluent and technologically advanced societies able to support a greater proportion of basic research than those with fewer resources to spare.

Health research triangle Yet another way of classifying health research, be it empirical or theoretical, basic or applied, is to describe it under three operational interlinked categories of biomedical, health services and behavioral research, the so-called health research triangle. Biomedical research deals primarily with basic research involving processes at the cellular level; health research deals with issues in the environment surrounding man, which promote changes at the cellular level; and behavioral research deals with the interaction of man and the environment in a manner reflecting the beliefs, attitudes and practices of the individual in society. Objectives of this module At the end of the session, participants should: ¨ Know the different types of epidemiological study designs, their uses and limitations, ¨ Know how to identify the most appropriate study design for a particular research question, ¨ Know sampling methods and sample size determination, ¨ Know the use of qualitative research methods in health research 2 Health Research Methods This watermark does not appear in the registered version - http://www. Learning objectives At the end of this session, participants should be able to: ¨ recognize and list the various types of descriptive studies ¨ understand the advantages and disadvantages of cross sectional studies ¨ know and understand the principles of planning and implementing a case- control study ¨ know and understand the potential biases associated with a case-control study ¨ know and understand the advantages and disadvantages of case-control study ¨ describe a cohort study design and indicate its strengths and weaknesses ¨ give a research question, and design an appropriate cohort study to investigate the problem.