Erratum to: Osteoporos Int

DOI 10.1007/s00198-011-1608-z

In the subsection “Cohort construction” under Methods, the first four sentences of the second paragraph should have read as follows:

Since more than 95% of the osteoporosis patients revisited their physician for their osteoporosis drug prescriptions within 120 days during the study period, we excluded those who filled their prescription for any osteoporosis medication or had been assigned diagnosis codes for osteoporosis during the period January 1, 2005 to April 30, 2005. By doing so, we constructed a retrospective cohort with newly diagnosed osteoporosis patients who had not taken any medications for osteoporosis. Patients who switched between bisphosphonate and any other medications for osteoporosis were excluded from the study. Additionally, individuals who were diagnosed with cancer (ICD-10 code: C-D), chronic renal failure (ICD-10 code: N18), or atrial fibrillation (ICD-10 code: I48) prior to taking osteoporotic drugs were also excluded.