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Table 2 Analysis of series reporting significant and non-significant reduction in the postoperative pain score

From: Efficacy of intraoperative epidural steroids in lumbar discectomy: a systematic review

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
[25, 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, 2628]    [3, 5, 18, 21, 22, 24, 2628]    [3, 18, 21, 2428]