Fig. 3 Trend in pain-related patient satisfaction (from HCAHPS) score across patients from 2009 to 2012 (n = 943). Data were presented as
percentage of “always” responses and were calculated based on nonmissing answers to 2 pain-related HCAHPS questions. The results for 2
HCAHPS pain-related questions were presented as mean ± 1.96* standard error, which descriptively showed 95% CIs.