title: Rates of change to a positive result in subsequent screening mammography in Korean women: a retrospective observational study.
abstract: OBJECTIVE
  This retrospective cohort study aimed at calculating some parameters of changes in the findings of the subsequent screening mammography (SSM) in female Korean volunteers.
  
  
  METHODS
  The study included screenees aged 30 to 79 years who underwent SSM voluntarily after testing negative in the baseline screenings performed between January 2007 and December 2011. A change to a positive result was defined as category 4 or 5 by using the American College of Radiology Breast Imaging Reporting and Data System. The proportion of results that had changed to positive (CP, %) was calculated by dividing the number of cases with results that were positive in the SSM by the total number of study participants. The rate of results that had changed to positive (CR, cases per 100 000 screenee-months) was calculated by dividing the number of cases with results that were positive in the SSM by the total number of months of the follow-up period.
  
  
  RESULTS
  The overall CP and CR in all age groups (n=77 908) were 2.26% and 93.94 cases per 100 000 screenee-months, respectively. The median CP interval in the subjects who had positive SSM results was 30 to 36 months, while that in the age group of 30 to 39 years was shorter.
  
  
  CONCLUSIONS
  Different screening intervals should be considered among women aged between 30 and 59 years. In addition, a strategy for a screening program should be developed for the age group of 30 to 39 years, in particular.
authors: Department of Preventive Medicine, Jeju National University School of Medicine, Jeju, Korea.
authors: Jong-Myon
authors: JM
authors: Bae
authors: Korea Medical Institute, Seoul, Korea.
authors: Sang Yop
authors: SY
authors: Shin
authors: Department of Preventive Medicine, Jeju National University School of Medicine, Jeju, Korea.
authors: Eun Hee
authors: EH
authors: Kim
authors: Severance Hospital, Seoul, Korea.
authors: Yoon-Nam
authors: YN
authors: Kim
authors: Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, Korea.
authors: Chung Mo
authors: CM
authors: Nam
mesh_terms: D000328:Adult; D000368:Aged; D044466:Asian People; D001943:Breast Neoplasms / Q000175:diagnosis* / Q000453:epidemiology; D055088:Early Detection of Cancer; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D008327:Mammography; D008403:Mass Screening; D008875:Middle Aged; D056910:Republic of Korea / Q000453:epidemiology; D012189:Retrospective Studies; D014930:Women
keywords: Breast neoplasms; Early detection of cancer; Mammography; Mass screening
references: Cancer Res Treat. 2013 Jun;45(2):86-94
references: 23864841
references: Cancer Res Treat. 2014 Apr;46(2):109-23
references: 24851102
references: Clin Obstet Gynecol. 2011 Mar;54(1):125-32
references: 21278511
references: Breast. 2007 Apr;16(2):113-9
references: 17081753
references: J Prev Med Public Health. 2014 Jul;47(4):201-5
references: 25139166
references: Cancer Epidemiol. 2009 Nov;33(5):315-8
references: 19896917
references: Epidemiol Health. 2014 Nov 04;36:e2014027
references: 25381996
references: JAMA. 2005 Mar 9;293(10):1245-56
references: 15755947
references: CA Cancer J Clin. 2000 Sep-Oct;50(5):312-36
references: 11075240
references: Epidemiol Health. 2014 Sep 26;36:e2014020
references: 25266421
references: Eur J Radiol. 2007 Feb;61(2):192-4
references: 17164080
references: J Med Screen. 2005;12(4):172-8
references: 16417693
references: CA Cancer J Clin. 2011 Mar-Apr;61(2):69-90
references: 21296855
references: Cancer Res Treat. 2015 Oct;47(4):564-8
references: 25687874
references: Epidemiol Health. 2014 Jul 30;36:e2014010
references: 25078383