Efficacy of Preoperative Administration of Paracetamol-Codeine on Pain following Impacted Mandibular Third Molar Surgery: A Randomized, Split-Mouth, Placebo-Controlled, Double-Blind Clinical Trial

Figure 2

Box-and-whisker plots related to the pain scores (NRS-11) in patients which received the placebo or analgesic drug, respectively, in the first or second surgery. The dark line in the middle of the boxes is the median. The box represents the interquartile (IQ) range which contains the middle 50% of the records. The whiskers are lines that extend from the upper and lower edge of the box to the highest and lowest values which are no greater than 1.5 times the IQ range. The circles are outliers. These are defined as values that do not fall in the whiskers. The asterisks or stars are extreme outliers. These represent cases that have values more than three times the height of the boxes.