Qualitative research in clinical epidemiology

Area of Science:

• Clinical Epidemiology
• Qualitative Research Methods
• Health Psychology

Background:

• Qualitative research offers valuable insights into human behavior.
• Grounded theory is a robust method for understanding complex experiences.
• Developing reliable scales is crucial for quantitative clinical studies.

Purpose of the Study:

• To demonstrate the utility of qualitative research in clinical epidemiology.
• To explore the lived experiences of end-stage renal disease (ESRD) patients undergoing hemodialysis.
• To develop and validate a psychometric scale for assessing patient perceptions of hemodialysis.

Main Methods:

• Grounded theory methodology was employed to analyze qualitative data from ESRD patients.
• A multilayered classification system and substantive theory were generated.
• The qualitative dataset was revisited for scale development, leading to the Patient Perception of Hemodialysis Scale (PPHS).
• Quantitative methods were used to confirm the psychometric properties of the PPHS.

Main Results:

• A substantive theory on living with end-stage renal disease and hemodialysis was developed.
• The Patient Perception of Hemodialysis Scale (PPHS) was created from the qualitative data.
• The PPHS demonstrated psychometric validity and reliability in quantitative analysis.
• The study supported the major premises of the developed substantive theory.

Conclusions:

• Qualitative research, specifically grounded theory, is highly useful in clinical epidemiology.
• The PPHS is a valid and reliable instrument for measuring patient perceptions of hemodialysis.
• This integrated qualitative and quantitative approach enhances understanding of patient experiences and supports theory development.