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Table 1 Comparisons of clinical data at baseline between MF FI ≥ 25% and FI < 25% groups in complete cohort

From: Can fat infiltration in the multifidus muscle be a predictor of postoperative symptoms and complications in patients undergoing lumbar fusion for degenerative lumbar spinal stenosis? A case–control study

Variable

FI ≥ 25% (n = 226)

FI < 25%(n = 235)

P value

Age (years)

62.0 ± 7.3

58.0 ± 7.4

 < 0.001**

Sex (male/female)

69:157

116:119

 < 0.001**

BMI (kg/m2)

26.0 ± 3.4

26.1 ± 3.3

0.815

Fusion to S1 (no: yes)

134:92

145:89

0.533

Number of fusion levels

1.9 ± 0.9

1.9 ± 0.9

0.937

Osteoporosis (no: yes)

145:79

185:47

 < 0.001**

Spondylolisthesis (no: yes)

123:67

121:40

0.035*

Smoking (no: yes)

194:32

200:35

0.823

Diabetes (no: yes)

189:37

201:34

0.571

MF FI (%)

36.3 ± 9.2

18.3 ± 4.7

 < 0.001**

Baseline

VAS for back pain

5.4 ± 2.0

5.1 ± 2.2

0.268

VAS for leg pain

6.1 ± 2.1

5.8 ± 2.3

0.186

ODI

41.5 ± 18.8

41.0 ± 20.3

0.591

  1. The numbers in bold represented that there was significant difference between the two groups
  2. *P < 0.05, **P < 0.01