Table 1.

Meta-analysis: Differences in acute postoperative pain scores between those who do and do not develop chronic postsurgical pain.

Study	Standardized mean difference (SE)	Weight (%)	Standardized mean difference inverse variance random effects (95% CI)
Choiniere et al 2014 [11]	0.14 (0.04)	24.2	0.14 (0.06 to 0.22)
King et al 2008 [25]	0.07 (0.11)	17.3	0.07 (-0.15 to 0.29)
Lahtinen et al 2006 [26]	0.13 (0.06)	22.7	0.13 (0.02 to 0.25)
Lee et al 2010 [35]	0.96 (0.39)	3.8	0.96 (0.19 to 1.74)
Steegers et al 2007 [29]	0.86 (0.17)	12.3	0.86 (0.53 to 1.19)
van Gulik et al 2011 [33]	0.31 (0.17)	12.6	0.31 (-0.02 to 0.63)
van Gulik et al 2012 [32]	0.27 (0.25)	7.1	0.27 (-0.25 to 0.79)
Total	N/Aa	N/A	0.28 (0.12 to 0.44)

^aN/A: not applicable.