Archives of Gynecology and Obstetrics

, Volume 300, Issue 1, pp 135–143 | Cite as

Agreement assessment of key maternal and newborn data elements between birth registry and Clinical Administrative Hospital Databases in Ontario, Canada

  • Qun MiaoEmail author
  • Deshayne B. Fell
  • Sandra Dunn
  • Ann E. Sprague
General Gynecology



Since 2012, BORN Ontario, a maternal-newborn registry, has collected data on every birth in Ontario. To ensure data quality, we assessed the reliability of key elements collected in BORN by comparing these with like data elements in the Canadian Institute for Health Information-Discharge Abstract Database (CIHI-DAD).


We used provincial health card numbers to deterministically link live or stillbirth records and their corresponding mothers’ records in the BORN database to the CIHI-DAD in the fiscal years 2012–2013 to 2014–2015. Percentage agreement and Cohen Kappa statistics were used to assess agreement on main elements in both databases.


The percentage agreement and Kappa coefficients were 99.98% and 0.740 (95% CI: 0.677–0.803) on live/stillbirth, respectively. The Kappa coefficients for infant sex, gestational age at birth, induction of labour, and caesarean birth were 0.989 (95% CI: 0.988–0.989), 0.920 (95% CI: 0.919–0.920), 0.782 (95% CI: 0.780–0.785), and 0.995 (95% CI: 0.995–0.996), respectively. Kappa agreement for the number of fetuses in a pregnancy was 0.979 (95% CI: 0.977–0.981). Percentage agreement was very high for infants’ birthdates (99.9%), infant postal codes (91.8%), infants’ birth weight in grams (95.5%), and mothers’ dates of birth (99.1%).


Overall, the BORN and CIHI-DAD databases had concordance on key birth and maternal data elements; however, additional work is needed to understand discrepancies identified.


The BORN database The Canadian Institute for Health Information Discharge Abstract Database (CIHI-DAD) Data quality Agreement Kappa test 



We thank all BORN staff, especially Ms. Jessica Reszel, Ms. Catherine Riddell, Ms. Farzana Yasmin, Ms. Vivian Holmberg, Dr. Jill Wiley and Dr. Mary (Yanfang) Guo for their excellent comments and editing on this manuscript. We also thank CIHI for providing the CIHI-DAD data to BORN.

Author contributions

Q Miao: project development, data management and analysis, manuscript writing and editing. DB Fell: project development, manuscript writing and editing. S Dunn: manuscript writing and editing. AE Sprague: project development, manuscript writing and editing.

Compliance with ethical standards

Conflict of interest

The authors declare that there is no conflict of interest.


Parts of this material are based on data and information compiled and provided by CIHI. However, the analyses, conclusions, opinions and statements expressed herein are those of the author(s), and not necessarily CIHI.

Ethical approval

As a quality assurance project, this data quality assessment was exempt from Research Ethics Board review in Canada.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.BORN OntarioChildren’s Hospital of Eastern Ontario (CHEO)OttawaCanada
  2. 2.Children’s Hospital of Eastern Ontario (CHEO) Research InstituteOttawaCanada
  3. 3.School of Epidemiology and Public HealthUniversity of OttawaOttawaCanada
  4. 4.Institute for Clinical Evaluative Sciences (ICES)OttawaCanada
  5. 5.School of Nursing, Faculty of Health SciencesUniversity of OttawaOttawaCanada

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