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Common Quality Issues with Revised Birth Certificate Data David Justice Data Acquisition and Evaluation Branch Division of Vital Statistics, NCHS. 2007: The Scales Tipped. Median Reporting Lag. Infant Death Underreporting. New item “Infant Alive at Time of Report”
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Common Quality Issues with Revised Birth Certificate Data David Justice Data Acquisition and Evaluation Branch Division of Vital Statistics, NCHS
Infant Death Underreporting • New item “Infant Alive at Time of Report” • If response is “NO” then a matching infant death record should be identified • March 2006 – Article in DVS newsletter • July 2006 – Presentation at VSCP Meeting
Infant Death Underreporting • January 2007 – DAEB sent “Infant Alive” reports to 2005 birth revisers • March 2007 – DAEB sent “Infant Alive” reports to all 2006 revisers • April 2007 – Article sent by Charlie Rothwell • May 2007 – DAEB sent < 500g reports to non-revisers
Infant Death Underreporting • Positive response to reports from DAEB • Identify infant deaths that have not been reported or linked • Identify birth records where “Infant Alive” is reported incorrectly • Identify birth records that should have been reported as a fetal death
Data Quality Issues • Out of range values and inconsistencies • State system not adhering to specs • State specs different from NCHS specs • NCHS specs not detailed enough • Some problems not identifiable on an individual record basis
Data Quality Issues 1APGAR SCORE AT 10 MINUTES • Depends on Apgar at 5 Minutes • Only if Apgar at 5 Minutes is < 6 • Code ’88’ is used when Apgar at 5 minutes is 06 - 10
Data Quality Issues • HISPANIC ORIGIN OF FATHER • Unknown level inconsistent with other father’s information (race, education, dob) • Defaulting to ‘NNNN’ when unmarried instead of ‘UUUU’
Data Quality Issues 3 INVALID FIPS CODES • Blanks are invalid • Use ZZ for country or state • Use 999 for county • Use 99999 for place
Data Quality Issues • METHOD OF DELIVERY – Attempted Forceps, Vacuum • Vs. Final Route and Method of Delivery = Forceps, Vacuum • Forceps/Vacuum should be reported in only one place
Data Quality Issues • RISK FACTOR – Previous C-Section • Bad combinations with # of C-sections: • Yes, 00 • No, 99 or reported number • Unknown, 00 or reported number
Data Quality Issues 6 RISK FACTOR – Infertility Treatment • Subcategories added end of 2003 • If infertility treatment = Y then report Y, N or U for subcategories • Otherwise, subcategories X or U
Data Quality Issues 7 MONTH DEFAULTS ON DATES • Other Pregnancy Outcome • Last Live Birth • First Prenatal Care Visit • Month reported as 01 instead of 99 when unknown month
Data Quality Issues • OUTLYING VALID VALUES • Mother’s Height in Feet (1,2,7,8) • Plurality (>6)
Not Classifiable Levels • Contract Standards • Reviser Levels are being monitored • Available on VSCP Website • 2007 levels have been added • Some items with 0 unknowns?
Facility Reports • All states are submitting facility codes on the revised file • 2005 Joint presentation by NCHS and N.Y. State • NCHS can produce reports by facility for any values, particularly unknowns
Void Flags • Void Lists not required if void flag used properly • Not used by all revised states • Annual Final Void List still required
2008 Documentation • Deliverable each Fall – plan to request a full set from all States in 2008 • Include certificates, worksheets, and system documentation – useful for 1st time revisers • NCHS would like to review drafts in advance
Questions or Concerns? DAEB Statistician or Vital Statistics Specialist David Justice DVS/DAEB Research Triangle Park, NC djustice@cdc.gov 919 541 0589