1. Intra-articular magnesium is effective for postoperative analgesia in arthroscopic knee surgery† 
R.S. Bondok, A.M. Abd El-Hady 
British Journal of Anaesthesia 
Volume 97, Issue 3, Pages (September 2006)
DOI: /bja/ael176
Copyright © 2006 British Journal of Anaesthesia Terms and Conditions

2. Fig 1
Bars represent the mean visual analogue pain scores 1, 2, 6, 8, 12, 18 and 24 h after surgery for each group. The extended bars represent SD. *Indicates a significant difference compared with control group.
British Journal of Anaesthesia  , DOI: ( /bja/ael176)
Copyright © 2006 British Journal of Anaesthesia Terms and Conditions

3. Fig 2
The analgesic duration in minutes in the two groups. The box represents the 25th–75th percentiles, and the mean is represented by the solid line. The extended bars represent the 10th–90th percentiles. Group M had a significantly longer time to first analgesic request than Group C (P<0.0001).
British Journal of Anaesthesia  , DOI: ( /bja/ael176)
Copyright © 2006 British Journal of Anaesthesia Terms and Conditions