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Table 1 Comparison of parameters between the L4 IS group and the L5 IS group

From: Straighter low lumbar curvature in isthmic spondylolisthesis at L4

Parameter Isthmus Spondylolisthesis Test
Result
P
Value
L4 L5
No. of patients 44 95
Age in yrs 58.5 ± 8.7 52.8 ± 10.1 t = −3.232 0.002 *
Sex (male/female) 15/29 29/66 χ2 = 0.177 0.674
BMI (kg/m2) 25.1 ± 4.3 24.6 ± 3.5 t = −0.640 0.523
Diabetes (yes/no) 4/40 15/80 χ2 = 1.143 0.285
Osteoporosis (yes/no) 3/41 7/88 χ2 = 0.014 0.907
PI(°) 58.4 ± 9.5 59.3 ± 12.4 t = 0.409 0.683
PT(°) 22.6 ± 9.6 20.0 ± 8.8 t = −1.616 0.108
SS(°) 36.1 ± 9.8 39.7 ± 10.6 t = 1.892 0.061
LL(°) 45.5 ± 13.2 48.4 ± 13.5 t = 1.190 0.236
LLL(°) 27.1 ± 8.2 30.9 ± 9.3 t = 2.326 0.021*
L5I(°) 29.9 ± 8.0 30.7 ± 13.0 t = 0.285 0.776
LSK(°) 106.8 ± 16.3 104.8 ± 14.5 t = −0.726 0.496
SR(%) 25.6 ± 7.3 25.1 ± 11.6 t = − 0.309 0.758
DDG 6.4 ± 1.5 5.9 ± 1.6 t = −1.855 0.066
ODI 50.1 ± 15.0 48.0 ± 15.1 t = −0.624 0.534
  1. Data are presented as number of patients or mean ± SD. BMI Body mass index; PI Pelvic incidence; PT Pelvic tilt; SS Sacral slope; LL Lumbar lordosis; LLL Lower lumbar lordosis; L5 I L5 incidence; LSA Lumbosacral angle; SR Slippage rate; DDG Disc degeneration grade; ODI Oswestry Disability Index
  2. *Statistically significant (P < 0.05)