Whittemore's integrative review framework is primarily designed for synthesizing qualitative research findings. It focuses on identifying common themes, patterns, and concepts across multiple qualitative studies. Therefore, it does not involve coding quantitative findings. If you are including quantitative studies in your review, you would typically handle them separately from the integrative review process.
So, to answer your question, the coding process in Whittemore's integrative review framework is specifically for qualitative findings. Quantitative findings would require a different approach, such as statistical analysis or meta-analysis, depending on the nature of the data and research question.