Open Access
CC BY-NC-ND 4.0 · Gesundheitswesen
DOI: 10.1055/a-2512-8004
Original Article

Assessing the time required for qualitative analysis: A comparative methodological study of coding interview data in health services research

Abschätzung des Zeitaufwands qualitativer Datenanalyse: Eine vergleichende methodologische Studie zur Kodierung von Interviews in der Versorgungsforschung
1   Medical Faculty, Heidelberg University, Germany
2   Department of General Practice and Health Services Research, Heidelberg
,
Michel Wensing
1   Medical Faculty, Heidelberg University, Germany
2   Department of General Practice and Health Services Research, Heidelberg
,
Nadja Klafke
1   Medical Faculty, Heidelberg University, Germany
2   Department of General Practice and Health Services Research, Heidelberg
,
Thomas Fleischhauer
1   Medical Faculty, Heidelberg University, Germany
2   Department of General Practice and Health Services Research, Heidelberg
,
Sabrina Brinkmöller
1   Medical Faculty, Heidelberg University, Germany
2   Department of General Practice and Health Services Research, Heidelberg
,
Regina Poß-Doering
1   Medical Faculty, Heidelberg University, Germany
2   Department of General Practice and Health Services Research, Heidelberg
,
Christine Arnold
3   Division of Neonatology, Department of Pediatrics, Inselspital, Bern University Hospital, University of Bern, Switzerland
› Author Affiliations
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Abstract

Background

A reliable estimation of required resources is essential for sound research. So far, there have only been a few studies on researchers’ time investment in qualitative studies. The aim of this study, therefore, was to provide an empirical account of the estimation of timescales of qualitative analysis.

Methods

In this methodological study, time expenditure was documented and compared for the focused coding of transcripts of semi-structured interviews within five qualitative studies in health services research. Data were analyzed descriptively by means of absolute frequencies.

Results

Across studies, focused coding was assessed in 94 interviews with a total interview duration of 52 hours and 44 minutes. The number of interviews per study ranged from n=11 to n=27, with a mean duration of 36 minutes. Total coding time amounted to 76 hours, with a mean of 32 min per interview. Coding time per interview time ratio ranged from 0.75 to 1.52 minutes. On average, the time spent on focused coding roughly corresponds to the duration of the interviews. Focused coding tended to get quicker over time, though variation among studies was high.

Conclusion

The results of this study provide a reference for estimating timescales of qualitative analysis and highlights the importance of considering factors such as composition of data and researchers’ experience and involvement. In a specific research project, this effort must be balanced against the objective of the analysis, including the desired accuracy, detail and depth. Further research is needed to specify how specific parameters (i. e. nature of the study population, method of data analysis and use of concepts and theories) affect coding in qualitative analysis.

Supplementary Material



Publication History

Received: 12 July 2024

Accepted after revision: 13 December 2024

Article published online:
14 April 2025

© 2025. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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