Table 4 Data for patients that underwent the A-P procedure grouped by PI-LL mismatch threshold of 10°

Number of patients

82

62

20

Age, (≥ 75 years/ < 75 years)

46/36

30/32

16/4

0.013

Sex, (F/M)

68/14

52/10

16/4

0.953

BMI, kg/m²

26.7 ± 5.4

26.5 ± 4.9

27.5 ± 5.7

0.419

BMD, T-score

-1.9 ± 1.5

-1.7 ± 1.2

-2.7 ± 1.7

0.005

Severe osteoporosis, n (%)

38

22 (35.5)

16 (80.0)

0.001

CCI

2.7 ± 1.4

2.6 ± 1.2

2.8 ± 1.5

0.531

UIV, n (%)

0.446

 T9-T10

63

49

14

 T11-T12

9

7

2

 L1-L2

10

6

4

Number of levels fused

7.6 ± 0.3

7.5 ± 0.3

7.6 ± 0.8

0.396

Number of LLIF

3.4 ± 0.5

3.3 ± 0.5

3.5 ± 0.6

0.164

Number of levels laminectomy

3.5 ± 1.3

3.5 ± 1.2

3.4 ± 1.6

0.722

Severe facet joint OA, n (%)

45

30 (48.4)

15 (75.0)

0.038

Dynamic changes in LL < 10°, n (%)

32

20 (32.3)

14 (70.0)

0.003