Capture-recapture methodology to study rare conditions using surveillance data for fragile X syndrome and muscular dystrophy

Details

• Alternative Title:
  Orphanet J Rare Dis
• Personal Author:
  Smith, Michael G. ; Royer, Julie ; Mann, Joshua ; McDermott, Suzanne ; Valdez, Rodolfo
• Description:
  Background
  
  Rare conditions can be catastrophic for families and the implications for public health can be substantial. Our study compared basic surveillance through active medical record review with a linked administrative data file to assess the number of cases of two rare conditions, fragile X syndrome (FXS) and muscular dystrophy (MD) in a population.
  
  Methods
  
  Two methods of data collection were used to collect information from five counties comprising two standard metropolitan statistical areas of South Carolina. The passive system relied mostly on health claims data using ICD-9 CM diagnostic codes. The active system relied on a nurse abstracting records from a list of all licensed physicians with specialties in neurology, orthopedics, and genetics.
  
  Results
  
  There were 141 FXS cases and 348 MD cases that met the case definitions using active surveillance. Additional cases were found for both conditions but they were determined to not be true cases. After linking the actively collected MD and FXS cases to passive datasets, we found that the estimated total numbers of cases were similar to using capture-recapture analysis; the positive predictive values for cases identified in the passive system were 56.6% for MD and 75.7% for FXS.
  
  Conclusions
  
  Applying capture-recapture methods to passively collected surveillance data for rare health conditions produced an estimate of the number of true cases that was similar to that obtained through active data collection.
  
  
• Subjects:
  Capture-recapture Fragile X Syndrome Muscular Dystrophy Passive Surveillance Research
• Source:
  Orphanet J Rare Dis. 12.
• Pubmed ID:
  28427448
• Pubmed Central ID:
  PMC5399384
• Document Type:
  Journal Article
• Funding:
  U01 DD000927/DD/NCBDD CDC HHS/United States
• Volume:
  12
• Collection(s):
  CDC Public Access
• Main Document Checksum:
  urn:sha256:9e182b3a90c1e9f5e5e21cb9ba22aeee202640f713aad5a83089285b6b64e6c6
• Download URL:
  https://stacks.cdc.gov/view/cdc/45541/cdc_45541_DS1.pdf
• File Type:
  [PDF - 386.06 KB ]