Table 1. Reasons for the underestimation of the prevalence hypocalcemia and hypoparathyroidism.

Lack of clear definitions

Conflicts of interest

Variety of laboratory ranges for normocalcemia and reference values

Timing of blood sampling in the postoperative period

Wide range in thyroid procedures included in the analysis

Different case mix

Small series

Missing data in national audits

Different policies for calcium and vitamin D supplements

Short/incomplete follow-up

Follow-up not performed by the surgical team but by referring physicians