title: [A preliminary survey of primary hyperparathyroidism in middle-aged and elderly Beijing Chinese].
abstract: OBJECTIVE
  To study the prevalence of hypercalcemia and primary hyperparathyroidism in middle-aged and elderly Chinese people who live in Beijing.
  
  
  METHODS
  This research was performed in a large elderly population group who came to our hospital for health checkup. The medical histories and relevant data of all the subjects were collected. Serum parathyroid hormone (PTH) concentration was determined in the 83 subjects whose blood calcium level was >or= 2.6 mmol/L. Meanwhile, another 83 of the subjects whose calcium level was < 2.6 mmol/L were chosen randomly as controls.
  
  
  RESULTS
  2451 subjects underwent the investigation. 83 (3.39%) out of the total 2451 subjects were found to have calcium level >or= 2.6 mmol/L, and 5 of them had PTH > 65 ng/L but no causative factors for the elevation. These subjects were thought to have primary hyperparathyroidism and its prevalence was 0.204%.
  
  
  CONCLUSIONS
  The prevalence of primary hyperparathyroidism was 0.204% in the investigated elderly subjects.
authors.affiliation: The PLA General Hospital, Beijing 100853, China.
authors.forename: Shuang-tong
authors.initials: ST
authors.lastname: Yan
authors.forename: Hui
authors.initials: H
authors.lastname: Tian
authors.forename: Chun-lin
authors.initials: CL
authors.lastname: Li
authors.forename: Wen-yi
authors.initials: WY
authors.lastname: Zong
authors.forename: Ying-hong
authors.initials: YH
authors.lastname: Shao
authors.forename: Wen-wen
authors.initials: WW
authors.lastname: Zhong
authors.forename: Yan-ping
authors.initials: YP
authors.lastname: Gong
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002118:Calcium / Q000097:blood; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D049950:Hyperparathyroidism, Primary / Q000097:blood / Q000453:epidemiology*; D008297:Male; D008875:Middle Aged; D010281:Parathyroid Hormone / Q000097:blood; D015995:Prevalence
chemical_list: D010281:Parathyroid Hormone; D002118:Calcium