Figure 2.

Placebo-adjusted PRSI scores at endpoint by patient group and baseline pain severity.

Notes: Comparison of endpoint placebo-adjusted PRSI scores between Chinese and international patients. Data are presented as the LS mean difference between pregabalin and placebo. Error bars are the 95% CIs. Lower scores indicate less disrupted sleep. Comparison was made for the total patient sample in each group, and for those patients categorized as having moderate pain (mean pain score ≥4 to <7) or severe pain (mean pain score ≥7 to 10) at baseline. Patients with mild baseline pain (mean pain score <4) were excluded from the study. p-values for pregabalin versus placebo are as indicated.

Abbreviations: LS, least squares; PRSI, pain-related sleep interference.