Validating abortion procedure coding in Canadian administrative databases

Saied Samiedaluie, Sandra Peterson, Rollin Brant, Janusz Kaczorowski, Wendy V Norman, Saied Samiedaluie, Sandra Peterson, Rollin Brant, Janusz Kaczorowski, Wendy V Norman

Abstract

Background: The British Columbia (BC) Ministry of Health collects abortion procedure data in the Medical Services Plan (MSP) physician billings database and in the hospital information Discharge Abstracts Database (DAD). Our study seeks to validate abortion procedure coding in these databases.

Methods: Two randomized controlled trials enrolled a cohort of 1031 women undergoing abortion. The researcher collected database includes both enrollment and follow up chart review data. The study cohort was linked to MSP and DAD data to identify all abortions events captured in the administrative databases. We compared clinical chart data on abortion procedures with health administrative data. We considered a match to occur if an abortion related code was found in administrative data within 30 days of the date of the same event documented in a clinical chart.

Results: Among 1158 abortion events performed during enrollment and follow-up period, 99.1 % were found in at least one of the administrative data sources. The sensitivities for the two databases, evaluated using a gold standard, were 97.7 % (95 % confidence interval (CI): 96.6-98.5) for the MSP database and 91.9 % (95 % CI: 90.0-93.4) for the DAD.

Conclusions: Abortion events coded in the BC health administrative databases are highly accurate. Single-payer health administrative databases at the provincial level in Canada have the potential to offer valid data reflecting abortion events.

Trial registration: ClinicalTrials.gov Identifier NCT01174225 , Current Controlled Trials ISRCTN19506752 .

Keywords: British Columbia; Clinical coding; Data collection; Database; Induced abortion; Reproducibility of results.

Figures

Fig. 1
Fig. 1
Number of the index abortions found in different data sources. Legend: RCD = Research Collected Database, MSP = Medical Service Plan Payment Database, DAD = Discharge Abstract Database

References

    1. Canadian Institute for Health Information . Induced abortions performed in Canada in 2011. 2014.
    1. Stanek AM, Bednarek PH, Nichols MD, Jensen JT, Edelman AB. Barriers associated with the failure to return for intrauterine device insertion following first-trimester abortion. Contraception. 2009;79(3):216–20. doi: 10.1016/j.contraception.2008.09.003.
    1. Norman WV. Induced abortion in Canada 1974–2005: trends over the first generation with legal access. Contraception. 2012;85(2):185–91. doi: 10.1016/j.contraception.2011.06.009.
    1. Bednarek PH, Creinin MD, Reeves MF, Cwiak C, Espey E, Jensen JT. Immediate versus delayed IUD insertion after uterine aspiration. N Engl J Med. 2011;364(23):2208–17. doi: 10.1056/NEJMoa1011600.
    1. Norman WV, Chiles J, Turner C. The contraceptive experience among women seeking abortion. Contraception. 2011;84(3):314.
    1. Health Canada . Regulatory decision summary (SBD): MIFEGYMISO - 2015 - Health Canada. 2015.
    1. Lee DS, Stitt A, Wang X, Yu JS, Gurevich Y, Kingsbury KJ, Austin PC, Tu JV. Administrative hospitalization database validation of cardiac procedure codes. Med Care. 2013;51(4):e22–26. doi: 10.1097/MLR.0b013e3182329778.
    1. Joseph KS, Fahey J. Validation of perinatal data in the discharge abstract database of the Canadian Institute for Health Information. Chronic Dis Can. 2009;29(3):96–100.
    1. Frosst G, Hutcheon J, Joseph KS, Kinniburgh B, Johnson C, Lee L. Validating the British Columbia perinatal data registry: a chart re-abstraction study. BMC Pregnancy Childbirth. 2015;15(1):123. doi: 10.1186/s12884-015-0563-7.
    1. Norman WV, Kaczorowski J, Soon JA, Brant R, Bryan S, Trouton KJ, Dicus L. Immediate vs. delayed insertion of intrauterine contraception after second trimester abortion: study protocol for a randomized controlled trial. Trials. 2011;12(1):149. doi: 10.1186/1745-6215-12-149.
    1. Norman WV, Chiles JL, Turner CA, Brant R, Aslan A, Kaczorowski J. Comparing the effectiveness of copper intrauterine devices available in Canada. Is FlexiT non-inferior to NovaT when inserted immediately after first-trimester abortion? study protocol for a randomized controlled trial. Trials. 2012;13(1):147. doi: 10.1186/1745-6215-13-147.
    1. Norman WV, Brooks M, Brant R, Soon JA, Majdzadeh A, Kaczorowski J. What proportion of Canadian women will accept an intrauterine contraceptive at the time of second trimester abortion? baseline data from a randomized controlled trial. J Obstet Gynaecol Can. 2014;36(1):51–59. doi: 10.1016/S1701-2163(15)30683-6.
    1. British Columbia Ministry of Health. Medical Services Plan (MSP) Payment Information File. Population Data BC. Data Extract. MOH (2014). 2014. .
    1. British Columbia Ministry of Health. Consolidation File (MSP Registration & Premium Billing). Population Data BC. Data Extract. MOH (2014). 2015.
    1. British Columbia Vital Statistics Agency. Vital Statistics Deaths. Population Data BC. Data Extract. BC Vital Statistics Agency (2014). 2014. .
    1. Canadian Institute for Health Information. Discharge Abstract Database (Hospital Separations). Population Data BC. Data Extract. MOH (2014). 2014. .
    1. Lisonkova S, Liu S, Bartholomew S, Liston RM, Joseph KS. Temporal trends in maternal mortality in Canada II: estimates based on hospitalization data. J Obstet Gynaecol Can. 2011;33(10):1020–30. doi: 10.1016/S1701-2163(16)35051-4.
    1. Smolina K, Hanley GE, Mintzes B, Oberlander TF, Morgan S. Trends and determinants of prescription drug use during pregnancy and postpartum in British Columbia, 2002–2011: a population-based cohort study. PLoS One. 2015;10(5):e0128312. doi: 10.1371/journal.pone.0128312.
    1. Leung VW, Soon JA, Lynd LD, Marra CA, Levine M. Population-based evaluation of the effectiveness of two regimens for emergency contraception. Int J Gynecol Obstet. 2016;133(3):342–6. doi: 10.1016/j.ijgo.2015.10.017.
    1. Bedouch P, Marra CA, FitzGerald JM, Lynd LD, Sadatsafavi M. Trends in asthma-related direct medical costs from 2002 to 2007 in British Columbia, Canada: a population based-cohort study. PLoS One. 2012;7(12):e50949. doi: 10.1371/journal.pone.0050949.
    1. Chamberlayne R, Green B, Barer ML, Hertzman C. Creating a population-based linked health database: a new resource for health services research. Can J Public Health. 1998;89(4):270.
    1. Liu S, Liston RM, Joseph KS, Heaman M, Sauve R, Kramer MS, Maternal Health Study Group of the Canadian Perinatal Surveillance System Maternal mortality and severe morbidity associated with low-risk planned cesarean delivery versus planned vaginal delivery at term. Can Med Assoc J. 2007;176(4):455–60. doi: 10.1503/cmaj.060870.
    1. Doctors of BC . Doctors of BC Guide to Fees. 2015.
    1. Population Data BC . The data access request (DAR) process. 2014.
    1. Norman WV, Soon JA, Maughn N, Dressler J. Barriers to rural induced abortion services in Canada: findings of the British Columbia abortion providers survey (BCAPS) PLoS One. 2013;8(6):e67023. doi: 10.1371/journal.pone.0067023.

Source: PubMed

Sponsorzy i współpracownicy

Warunki medyczne

Interwencje lekowe

3
Subskrybuj