Fig. 2
From: Prevalence of pain 6 months after surgery: a prospective observational study
Distribution of pain ratings at three different time points/ surgery groups. The bars show relative frequencies of patients indicating the corresponding ratings on the numerical rating scale (NRS). Patients undergoing joint surgery are presented in black (a, d, and g), patients undergoing back surgery in grey (b, e, and h), and patients with urological operations in light grey (c, f, and i). The small dotted line in g, h, and i indicates the proportion of patients quoting pain of “3” and higher