Fig. 4. General impression (GI) of efficacy in pain treatment
with (a) placebo (n = 110) and (b) oxycodone/paracetamol
(n = 115) at the end of the trial, P < 0Æ001. GI was assessed
3 days after administration of study medication using a categorical
5-point visual rating scale (0 = poor; 1 = fair; 2 = good;
3 = very good; and 4 = excellent).