The risk factors of vertebral refracture after kyphoplasty in patients with osteoporotic vertebral compression fractures: a study protocol for a prospective cohort study

Table 1 Timeline of data collection

Data collection		Pre	Op	1 m	3 m	12 m	24 m	OR
Demographic information	Gender	√
	Age	√
	Height	√
	Weight	√
	BMI	√
Life style	Tobacco consumption	√		√	√	√	√	√
Bone metabolic status	BMD	√		√	√	√	√	√
	Bone metabolic markers	√		√	√	√	√	√
	Anti-osteoporosis treatment	√		√	√	√	√	√
Sex hormone	Serum hormone concentrations	√		√	√	√	√	√
Sex hormone	SHBG	√		√	√	√	√	√
Clinical characteristics	Affected vertebra number	√
Clinical characteristics	VAS score	√		√	√	√	√	√
Surgical features	Balloon volume		√
	Cement volume		√
	Vertebral height	√	√			√	√	√
	Bone cement leakage		√

Pre: pre-operation. Op: operation. 1 m, 3 m, 12 m, 24 m: one month, three months, 12 months, 24 months postoperatively. OR Orthopedist review

ISSN: 1471-2474