Figure 2.

Frequency distributions of scores for change in pain, subjective improvement, and patient satisfaction.

Notes: (A) Change in pain scores. These were calculated as an 11-point numeric rating scale (NRS-11) score on follow-up minus NRS-11 score on admission. Negative scores indicated improvement and positive scores implied worsening of pain intensity. Change scores ≤−2 (white bars) and ≥+2 (black bars) were regarded as clinically meaningful. Gray bars indicate number of patients who did not experience meaningful changes in pain intensity. (B) Frequency distribution of subjective improvement scores. (C) Frequency distribution of patient-satisfaction scores. Improvement and satisfaction were assessed employing the NRS-11, where 0 represented the worst and 10 the best possible outcome.

Abbreviation: NA, not applicable (no response recorded).