Table 6 Demographics, spinal parameters, and clinical assessments of patients with single VCF and multiple VCFs

Number of patients

30

21

Age (years)

71.7 ± 9.9

72.4 ± 9.4

0.69

Sex (M/F)^a

4/26

2/19

1.00

Height (cm)

151.5 ± 7.1

150.8 ± 5.3

0.72

Body weight (kg)

55.5 ± 9.1

51.4 ± 13.4

0.20

Body mass index (kg/m²)

24.1 ± 3.2

22.5 ± 5.3

0.17

Diagnosis of the hip^a

0.91

 OA

21

13

 ONFH

7

6

 Others (RDC, post-traumatic OA)

2

2

 LL (°)

38.7 ± 22.8

33.2 ± 18.9

0.36

 PI (°)

52.4 ± 12.5

52.6 ± 11.8

0.95

 PT (°)

20.8 ± 14.3

24.2 ± 8.7

0.33

 SS (°)

31.6 ± 15.1

28.4 ± 11.2

0.42

 TK (°)

28.7 ± 14.2

33.2 ± 14.5

0.28

 SVA (mm)^a

60.8 (28.4–96.5)

59.2 (36.8–115.3)

0.25

 PI-LL (°)

13.7 ± 21.5

19.4 ± 17.9

0.32

Preoperative clinical assessments

 HHS

49.0 ± 13.5

49.1 ± 12.6

0.99

 OHS

25.8 ± 11.4

27.5 ± 12.3

0.60

 UCLA activity score^a

3 (2–4)

3 (2–5)

0.48

 VAS for LBP^a

3 (0–7)

5 (0.5–6.7)

0.43

Postoperative clinical assessments

 HHS^a

90.4 (86.0–98.4)

85.9 (79.8–93.4)

0.04

 OHS^a

48 (41–48)

45 (37–48)

0.18

 UCLA activity score^a

4.5 (4–6)

4 (3–4.5)

0.04

 VAS for LBP^a

1 (0–4.3)

1 (0–5)

0.38

Changes of clinical assessments

 ΔHHS

41.6 ± 11.1

36.8 ± 12.9

0.17

 ΔOHS

18.0 ± 9.1

14.9 ± 12.0

0.31

 ΔUCLA activity score

1 (1–2)

1 (-0.5–2)

0.27

 ΔVAS for LBP

1.5 ± 2.9

1.5 ± 3.6

0.94