Table 4.

Slipping distance of spondylolisthesis of patients in four groups at the neutral, flexion, and extension position

	ND	DD	BD	HD
Neutral position
L1	−0.46±0.93	−0.79±1.10	−0.62±1.12	−0.91±0.95
L2	−0.96±0.95	−0.70±1.14	−0.73±1.32	−0.90±1.05
L3	0.80±1.58	−0.84±1.65	−0.74±1.76	−1.06±1.44
L4	−1.28±1.53	−0.73±2.10	−1.01±2.13	−1.51±2.37
L5	−3.64±1.90	2.27±2.92	−2.76±2.87	−3.36±2.86
Flexion position
L1	0.24±1.05	−0.02±1.13	−0.23±1.23	−0.01±1.21
L2	0.02±1.27	−0.09±1.36	−0.03±1.08	−0.23±1.32
L3	−0.14±1.27	0.01±1.46	−0.28±1.75	−0.50±1.64
L4	−0.14±1.71	−0.18±2.30	−0.62±2.23	−0.59±2.57
L5	−3.51±2.01	−2.33±3.13	−2.76±2.61	−2.45±2.50
Extension position
L1	−1.55±1.07	−1.15±1.18	−1.11±1.30	−1.51±1.37
L2	−1.57±1.21	−1.26±1.35	−1.38±1.58	−1.35±1.30
L3	−1.39±1.18	−1.52±1.67	−1.41±2.04	−1.82±1.36
L4	−1.67±1.45	−1.54±2.63	−1.81±3.32	−1.65±2.78
L5	−3.80±2.04	−2.39±3.18	−2.67±2.56	−2.73±2.35

Note: Data presented as mean ± SD.

Abbreviations: BD, bulging discs; DD, degenerative discs; HD, herniated discs; ND, normal discs.