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Table 1 Comparison of overall parameters between MRI and CT groups

From: Paraspinal muscle changes after single-level posterior lumbar fusion: volumetric analyses and literature review

 MRI (n = 24)CT (n = 16)p-value
Female, n (%) 13 (54.2%)9 (56.3%)0.897
Age, mean ± SD 61.79 ± 12.1358.19 ± 12.040.362
BMI (kg/m2) 24.53 ± 3.6125.46 ± 3.710.433
Preoperative, mean (cm3 ± SD)
 MFRight33.08 ± 3.8934.25 ± 3.650.835
Left33.83 ± 3.4534.67 ± 3.530.870
 ESRight90.83 ± 6.7971.47 ± 9.050.090
Left85.24 ± 6.4566.15 ± 9.700.097
 PsoasRight59.96 ± NA68.25 ± NA0.420b
Left63.59 ± 5.2463.79 ± 7.080.982
 Height of vertebrae 5.73 ± 0.485.58 ± 0.390.306
1 year after PLIF, mean (cm3 ± SD)
 MFRight19.66 ± 1.6927.63 ± 3.650.034a
Left20.11 ± 2.0826.71 ± 3.280.082
 ESRight82.90 ± 6.9649.54 ± 6.880.002a
Left78.76 ± 6.1953.75 ± 8.600.020a
 PsoasRight59.82 ± NA72.77 ± NA0.202b
Left64.41 ± 5.9367.60 ± 7.440.738
 Height of vertebrae 5.81 ± 0.385.63 ± 0.370.148
  1. MRI magnetic resonance imaging, CT computed tomography, BMI body mass index, SD standard deviation, MF multifidus, ES erector spinae, NA not applicable
  2. a Statistically significant difference was defined as p < 0.05
  3. b Mann–Whitney U test was used because the data was not normally distributed