Table 2.

Analysis of series reporting significant and non-significant reduction in the postoperative pain score

Series reporting	Early outcome			Intermediate outcome			Late outcome
	(1Hour-2Weeks)			(+2Weeks-2Months)			(+2Months-1Year)
	Total series number [References]	Total patients number	Median publication year	Total series number [References]	Total patients number	Median publication year	Total series number [References]	Total patients number	Median publication year
Significant reduction in pain score	9	758	2007	4	397	2006	2	280	2006
	[2-5,19,20,22,23,25]			[4,17,20,23]			[17,20]
Non-significant reduction in pain score	2	194	2005	3	267	2007	6	580	2008
	[18,21]			[2,19,25]			[2,4,5,19,22,23]
No pain score	5	519	1992	9	807	2002	8	611	1994
	[17,24,26-28]			[3,5,18,21,22,24,26-28]			[3,18,21,24-28]