Figure 3. Responses in dysmenorrheic participants during menses are further broken out by IMMPACT pain relief categories.

The results in Table 2 were recalculated based on reported relief to naproxen. Participants who demonstrated mild/no relief to naproxen had insignificant changes in bout duration, number of bouts, and bout intensity, while participants who demonstrated moderate/substantial response had significant changes in all measured parameters.