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Table 4 Summary of the lower extremity VAS follow-up results

From: Closed drainage versus non-drainage for single-level lumbar discectomy: a prospective randomized controlled study

  Closed drainage group Non-drainage group p
Preoperative 7.6 ± 0.8 7.7 ± 0.7 0.179
Postoperative 2.7 ± 0.7 2.8 ± 0.7 0.134
Last follow-up 2.0 ± 0.7 2.1 ± 0.6 0.128
  1. Data are presented as mean ± standard deviation
  2. Abbreviation: VAS visual analog scale