Figure 3. Response Rates Based on Xerostomia Questionnaire (XQ) Scores by Treatment Group at Each Time Point.

Difference in distributions between true acupuncture (TA) and standard oral hygiene (SOH) was statistically significant at weeks 4, 8, and 12 (P = .03 for each time point). Difference in distribution between sham acupuncture (SA) and SOH was significant at week 12 (P = .01). Differences were assessed using χ² tests. No response indicates any increase in XQ scores or decrease of less than 10 points; minor response, 10- to 19-point decrease in XQ score; and partial response, 20 points or more decrease in XQ score.