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Table 2 Operation data

From: Posterolateral fusion combined with posterior decompression shows superiority in the treatment of severe lumbar spinal stenosis without lumbar disc protrusion or prolapse: a retrospective cohort study

Parameters

PLF group (n = 77)

CF group (n = 76)

P

Operative time (min)

 One level (PLF = 46, CF = 42)

118.8 ± 13.0

150.8 ± 13.4

< 0.001

 Two level (PLF = 27, CF = 33)

149.3 ± 15.4

174.5 ± 17.6

< 0.001

 Three level (PLF = 4, CF = 1)

180.0 ± 8.2

200

< 0.001

 Total level

132.7 ± 22.7

161.8 ± 19.7

< 0.001

Blood loss (ml)

 One level (PLF = 46, CF = 42)

122.3 ± 19.9

169.4 ± 24.6

< 0.001

 Two level (PLF = 27, CF = 33)

162.0 ± 20.9

217.9 ± 34.1

< 0.001

 Three level (PLF = 4, CF = 1)

198.8 ± 31.2

250

< 0.001

 Total level

140.2 ± 31.1

191.5 ± 38.1

< 0.001

  1. Values presented as mean ± standard deviation. Unpaired sample t test indicated analysis of variance. Differences between the two groups were significant (P < 0.001)