Posterolateral fusion combined with posterior decompression shows superiority in the treatment of severe lumbar spinal stenosis without lumbar disc protrusion or prolapse: a retrospective cohort study

Table 4 Radiologic results

Parameters	PLF group (n = 77)	CF group (n = 76)	P
Disc height (cm)
Preoperative	0.90 ± 0.05	0.89 ± 0.06	NS
6 months	0.96 ± 0.07	1.04 ± 0.07	※
1 year	0.94 ± 0.06	1.00 ± 0.07	※
2 years	0.93 ± 0.06	0.99 ± 0.07	※
Lumbar lordosis (degree)
Preoperative	33.08 ± 4.02	34.37 ± 4.44	NS
6 months	36.32 ± 4.09	39.55 ± 2.57	※
1 year	35.30 ± 3.81	38.64 ± 3.04	※
2 years	34.12 ± 3.80	37.14 ± 2.71	※
No fusion (n)
6 months	17	12	NS
1 year	11	6	NS
2 years	6	4	NS

There were no significant differences between the two groups, as calculated with unpaired sample t test and Chi-square test
NS no significant difference
※, P < 0.05

ISSN: 1749-799X