title: National utilization of calcium supplements in patients with osteoporotic hip fracture in Korea.
abstract: BACKGROUND
  Calcium is prescribed worldwide for patients diagnosed with osteoporosis. However, the national utilization of calcium and compliance with calcium is unclear in Korea. Our purpose is to evaluate Korea's national utilization of calcium and compliance with calcium in patients with osteoporotic hip fracture from 2007 to 2010 using data from the Health Insurance Review and Assessment (HIRA) Service.
  
  
  METHODS
  From 2007 to 2011, osteoporotic hip fractures were identified using the International Classification of Diseases, 10th revision (ICD-10) and procedure code form from the nationwide database of the Health Insurance Review and Assessment Service. Compliant users of calcium were defined as the patients' medication possession ratio of 80 or more. We analyzed the compliance of calcium according to age and gender.
  
  
  RESULTS
  Among 85,228 patients with hip fracture, 20,800 patients (24.4%) received a prescription of a calcium supplement. Among them, only 1,692 patients (8.1%) were identified as compliant users of calcium. The proportion of compliant users was higher in women than men in all age groups. The proportion of compliant users decreased with age in women.
  
  
  CONCLUSIONS
  In Korea, the national utilization of calcium was low and compliance with calcium was unsatisfactory even in patients with osteoporotic hip fracture.
authors: Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.
authors: Sang-Hwan
authors: SH
authors: Kim
authors: Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, Seoul, Korea.
authors: Young-Bong
authors: YB
authors: Ko
authors: Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.
authors: Young-Kyun
authors: YK
authors: Lee
authors: Department of Orthopaedic Surgery, Seoul National University Bundang Hospital, Seongnam, Korea.
authors: Seok-Woo
authors: SW
authors: Hong
authors: Division of Endocrinology, Department of Internal Medicine, Chungbuk National University College of Medicine, Cheongju, Korea.
authors: Hyung-Jin
authors: HJ
authors: Choi
authors: Department of Orthopaedic Surgery, Chung-Ang University College of Medicine, Seoul, Korea.
authors: Yong-Chan
authors: YC
authors: Ha
authors: Division of Endocrinology and Metabolism, Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
authors: Chan-Soo
authors: CS
authors: Shin
keywords: Calcium; Compliance; Hip fractures; Osteoporosis; Osteoporotic fractures