A 6-month open-label extension and 12-month follow-up in 781 women receiving full-length parathyroid hormone, PTH(1–84), has revealed the benefits of adherence to the daily injections. The participants had already received PTH(1–84) for 18 months; treatment over 24 months increased BMD at the lumbar spine by 6.8% above baseline. In those with ≥80% adherence to the regimen, however, the increase was 8.3%, as compared with 4.9% in patients with poor adherence. Correspondingly, fewer fractures were sustained by those with greater adherence.