Table 4.

Comparison of postoperative clinical results in group A and group B

Parameter	Group A (n = 14)	Group B (n = 40)	P value
Follow up, mean (SD), (months)	40.4 (19.5)	37.4 (19.3)	0.61
No. of postoperative fracture, n (%)	12 (85.7)	10 (25)	< 0.001
No. of proximal junctional kyphosis, n (%)	12 (85.7)	24 (60)	0.07
No. of PS loosening, n (%)	14 (100)	38 (95)	0.54
No. of uppermost PS loosening, n (%)	14 (100)	30 (75)	0.04
No. of uppermost PS loosening within 3 months, n (%)	10 (71.4)	16 (40)	0.04
No. of lowermost PS loosening, n (%)	10 (71.4)	32 (80)	0.37
No. of postoperative treatment for osteoporosis, n (%)	14 (100)	34 (77.2)	0.04
No. of teriparatide use, n (%)	2 (14.2)	16 (40)	0.07