Predictors of Hypocalcemia after Thyroidectomy: Results from the Nationwide Inpatient Sample

Table 4

Postoperative hypocalcemia after thyroidectomy among multicenter patient cohorts.

Study	Years	Location	Patients (𝑛)	Hypocalcemia incidence (%)		Hypocalcemia definition	Independent risk factors
				Overall	TT
Rosato et al. [16]	1995–2000	Italy	14,934	10.0	14.0	Symptomatic	Thyroid cancer
Hundahl et al. [17]	1996	USA	5,354	10.0	12.4	Study protocol code	NA
Bergenfelz et al. [18]	2004–2006	Sweden	3,660	NA	9.9	Required vitamin D at 1–6 weeks after surgery	Female gender, neck dissection, previous thyroidectomy, resected parathyroid glands, low preoperative serum calcium
Gourin et al. [19]	1990–2009	USA (Maryland)	21,270	NA	10.0	ICD-9	Thyroid cancer, total thyroidectomy, neck dissection, low-volume surgeons
Current study	1998–2008	USA	119,567	5.5	9.0	ICD-9	As described

TT: total thyroidectomy; NA: not available; ICD-9: International Classification of Diseases, Ninth Revision.