A Open-label Study Investigating the Safety and Tolerability of NPSP558, a Recombinant Human Parathyroid Hormone (rhPTH [1-84]), for the Treatment of Adults With Hypoparathyroidism - A Clinical Extension Study (RACE)

SAE is an adverse event (AE) that results in death, life threatening, persistent or significant incapacity or substantial disruption of ability to conduct normal life functions, hospitalization or prolongation of existing hospitalization, congenital anomaly or birth defect, important medical events that may not result in death, be life threatening, or require hospitalization. An AE is defined as any untoward medical occurrence in a participant or clinical investigation participant administered a pharmaceutical or medicinal product. Treatment emergent adverse events (TEAEs) were defined as AEs whose onset occurs, severity worsens or intensity increases after receiving the study medication of this study and <= 30 days after last dose of study drug.

A responder was defined as a participant who met all of the following 3 criteria at each (1) a greater than (>) 50% reduction from baseline or less than (<) 500 milligram (mg) of daily calcium supplementation. (2) a >50% reduction from baseline or <0.25 microgram (mcg) of daily calcitriol supplementation. (3) an albumin-corrected total serum calcium concentration that was normalized or maintained compared to the baseline greater than or equal to (>=) 1.875 millimoles per liter (mmol/L) and not exceeding the Upper Limit of Normal (ULN) values (2.15 to 2.55 mmol/L). End of Treatment (EOT) was defined as the last determination of response or last available measurement during the treatment period. Number of responders with calcium source for citrate and carbonate at week 52 was reported here.

A responder was defined as a participant who met all of the following 3 criteria at each (1) a greater than (>) 50% reduction from baseline or less than (<) 500 milligram (mg) of daily calcium supplementation. (2) a >50% reduction from baseline or <0.25 microgram (mcg) of daily calcitriol supplementation. (3) an albumin-corrected total serum calcium concentration that was normalized or maintained compared to the baseline greater than or equal to (>=) 1.875 millimoles per liter (mmol/L) and not exceeding the Upper Limit of Normal (ULN) values (2.15 to 2.55 mmol/L). End of Treatment (EOT) was defined as the last determination of response or last available measurement during the treatment period. Number of responders with calcium source for citrate and carbonate at EOT was reported here.

Percent change from baseline of oral calcium supplementation were reported. EOT was defined as the last determination of response or last available measurement during the treatment period.

Percent change from baseline of oral calcitriol supplementation were reported. EOT was defined as the last determination of response or last available measurement during the treatment period.

Percent change in ACSC was reported. EOT was defined as the last determination of response or last available measurement during the treatment period.

Change in 24 hour urine calcium excretion was reported. EOT was defined as the last determination of response or last available measurement during the treatment period.

Change from baseline in urinary calcium concentration in participants who used at least one calcium-sparing diuretics and participants who not used calcium-sparing diuretics were reported. EOT was defined as the last determination of response or last available measurement during the treatment period.

Change in serum calcium concentration of the number of participants who used at least one calcium-sparing diuretics and not used calcium sparing diuretics were reported. EOT was defined as the last determination of response or last available measurement during the treatment period.

Change of serum phosphate from baseline were reported. EOT was defined as the last determination of response or last available measurement during the treatment period.

The normal range of calcium phosphate product is defined as <= 4.441 millimoles square per liter square (mmol^2/L^2).

Bone Turnover Markers such as bone specific alkaline phosphatase (BSAP), serum procollagen type 1 amino-terminal propeptide (P1NP) , osteocalcin were reported in particpiants. EOT was defined as the last determination of response or last available measurement during the treatment period.

Change form baseline in bone turnover marker (s-CTx)was reported. EOT was defined as the last determination of response or last available measurement during the treatment period.

Change from baseline in BMD of lumbar spine (L1-L4), hip-total, hip-trochanter, hip-intertrochanter, hip-ward's triangle, hip-femoral neck, distal one third radius at Week 52 then every 12 months until EOT were assessed by dual-energy X-ray absorptiometry [DXA] and Z-score. EOT was defined as the last determination of response or last available measurement during the treatment period.