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Table 5 Summary of the Oswestry Disability Index 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

59.9 ± 4.1

59.8 ± 4.2

0.736

Postoperative

32.4 ± 4.0

32.8 ± 3.9

0.348

Last follow-up

22.5 ± 3.1

22.8 ± 2.7

0.298

  1. Data are presented as mean ± standard deviation