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Table 3 Relationship between pre-operative pain and pain on 1st post obturation day.

From: Endodontic flare-ups: comparison of incidence between single and multiple visit procedures in patients attending a Nigerian teaching hospital

Group No preop. Pain     Postob. Pain     Preop. Pain     Postob. Pain
  No. (%)     No. (%)     No. (%)     No. (%)
Single visit(n = 107) 40 (37.4)     8 (20.0)     67 (62.6)     50 (74.6)
            x2 = 9.04, p = 0.002
Multi Visit(n = 136) 48 (35.3)     6 (12.5)     88 (64.7)     55 (62.5)
            x2 = 12.5, p = 0.0004