Fig. 4
From: Sublingual sufentanil after orthopaedic and abdominal surgery: long-term outcome and safety

a Boxplot showing the improved activities of daily lives over time reported on an 11-point Likert scale (10 points representing maximum impairment of daily activities). Reported impairment of daily activities by the main pain improved significantly from pre-operatively to 12 months postoperatively (p < 0.001). b Boxplots showing the individual health indices (0–1.0) pre-operatively, postoperatively, at 3 and 12 months postoperatively