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Table 1 Patients’ characteristics

From: Transforaminal lumbar interbody fusion (TLIF) versus posterior lumbar interbody fusion (PLIF) in the treatment of single-level lumbar spondylolisthesis

Parameters PLIF group
(N = 46)
TLIF group
(N = 48)
Age (years)
 Range 20–56 23–52
 Mean ± SD 37.59 ± 8.84 38.75 ± 7.23
Gender
 Male 15 (32.6%) 19 (39.6%)
 Female 31 (67.4%) 29 (60.4%)
Follow-up, months
 Range 6–30 6–32
 Mean ± SD 20.24 ± 7.39 19.02 ± 5.03
VAS back (preoperative)
 Range 5–9 5–9
 Mean ± SD 7.00 ± 1.26 7.25 ± 1.28
VAS leg (preoperative)
 Range 4–9 4–9
 Mean ± SD 7.39 ± 1.24 6.75 ± 1.28
ODI (preoperative)
 Range 34–79 32–77
 Mean±SD 55.37±13.05 51.42±12.45
Grade of spondylolithesis
 Grade I 25 cases (54.3%) 32 cases (66.7%)
 Grade II 21 cases (45.7%) 16 cases (33.3%)
Type of spondylolithesis, n (%)
 Degenerative 27 cases (58.7%) 25 cases (50%)
 Isthmic 19 cases (41.3%) 23 cases (50%)
Affected level
 L3–L4 4 (8.7%) 3 (6.2%)
 L4–L5 25 (54.3%) 31 (64.6%)
 L5–S1 17 (37%) 14 (29.2%)