Major approaches used for mix method research are:

1) Convergent parallel design

2) Explanatory sequential

3) Exploratory sequential

Mix method research always involve integration of data at certain stage. U may follow any aforementioned sequence depending upon your research objectives.

@Jawad and Orhan: Thank you so much for the answers. And thank you for the literature. I have one more question regarding using footnotes. I have my in-depth interviews transcribed and analysed as well as coded. Is it a norm to provide footnotes for the quotes used in the data analysis referring to the transcriptions? Much appreciated.

I agree with Jawad and Orhan that the nature of the integration depends on the type of design that you used, and thus the purpose for combining methods. For some designs, it definitely is possible to write them up as separate chapters, and this especially the case for sequential designs. For example, in an "explanatory sequential" design (QUANT --> qual), you would begin by describing the quantitative results, and then write up how the subsequent qualitative data helped you further understand the qualitative results. Typically, you would follow this with a Discussion chapter that pursued further integration of the two portions of your larger study.

With regards to reporting your qualitative data, it is not necessary to use footnotes. You might however want to number your participants and then report which participant was the source for any given quote. This shows the reader that you aren't relying too heavily on just a few of your participants.

Yes, I agree with Jawad Ali and David L Morgan

If your goal is to complement understanding of your quantitative with qualitative findings, then you should integrate them in a single section/chapter.

Definitely take a look at these resources to help you figure out how to do it:

1. Integrating Qualitative and Quantitative Methods

James D. Fearon and David D. Laitin

http://www.oxfordhandbooks.com/view/10.1093/oxfordhb/9780199286546.001.0001/oxfordhb-9780199286546-e-33

2. Research Design and Research Methods In: Integrating Qualitative and Quantitative Methods: A Pragmatic Approach By David L Morgan

https://www.bookdepository.com/Integrating-Qualitative-Quantitative-Methods-David-L-Morgan/9780761915232

3. Mixed Methods: Integrating Quantitative and Qualitative Data Collection and Analysis While Studying Patient-Centered Medical Home Models

https://pcmh.ahrq.gov/sites/default/files/attachments/MixedMethods_032513comp.pdf

4. Integrating Qualitative and Quantitative Methods

https://pdfs.semanticscholar.org/ecc9/30a7eb4a0acd1209f37ef1fc72c71186bf8e.pdf

5. Integrating Quantitative and Qualitative Results in Health Science Mixed Methods Research Through Joint Displays. Timothy C. Guetterman, PhD, Michael D. Fetters, MD, MPH, MA, and John W. Creswell, PhD

Article Integrating Quantitative and Qualitative Results in Health S...

6. FAQ 33: How do I bring qualitative and quantitative data together?

http://www.lse.ac.uk/media@lse/research/eukidsonline/bestpracticeguide/faq33.aspx

How you present your qualitative data depends on how you have managed it. Did you use names, then anonymize? Did you number? Or did you code your respondents (eg 1/2 female or male; age; geographical location site etc) so respondent 1253 would be a 25 year old female from your 3rd site. Footnotes are generally not recommended except as need to provide essential technical clarification - everything else would go into endnotes, but the coding system allows a lot of information to be conveyed very economically.

There are no set rules.

Stephen Andrew Linstead

Thanks, Stephen; yes, I used names and anonymized and a mixed-method survey approach for data collection and analysis.