Table 3.

Effect of bisphosphonate use prior to osteoporotic vertebral fracture

	With prior BP	Without prior BP	p-value
BP group
Union rate at 6 months	61.0% (11/18)	71.4% (30/42)	0.547
Union rate at final follow-up	88.9% (16/18)	90.5% (38/42)	1.000
Time-to-union (months)	8.3 ± 2.1	7.8 ± 1.4	0.827
	(95% C.I.: 4.2 – 12.5)	(95%C.I.: 5.0 – 10.5)
TPD group
Union rate at 6 months	85.7% (18/21)	94.1% (16/17)	0.613
Union rate at final follow-up	95.2% (20/21)	100% (17/17)	1.000
Time-to-union (months)	4.8 ± 0.5	3.4 ± 0.6	0.070
	(95% C.I.: 3.8 – 5.8)	(95% C.I.: 2.3 – 4.5)
p-value
Union rate at 6 months	0.141	0.084
Union rate at final follow-up	0.586	0.314
Time-to-union	0.115	0.042

*p < 0.05, With prior BP: with bisphosphonate use prior to the time of osteoporotic vertebral fracture, Without prior BP: without bisphosphonate use prior to the time of osteoporotic vertebral fracture