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Positive predictive value of ICD-10 codes for acute myocardial infarction in Japan: a validation study at a single center.
BMC Health Serv Res. 2018 Nov 26; 18(1):895.BH

Abstract

BACKGROUND

In Japan, several large healthcare databases have become available for research since the early 2000's. However, validation studies to examine the accuracy of these databases remain scarce. We conducted a validation study in order to estimate the positive predictive value (PPV) of local or ICD-10 codes for acute myocardial infarction (AMI) in Japanese claims. In particular, we examined whether the PPV differs between claims in the Diagnosis Procedure Combination case mix scheme (DPC claims) and in non-DPC claims.

METHODS

We selected a random sample of 200 patients from all patients hospitalized at a large tertiary-care university hospital between January 1, 2009 and December 31, 2011 who had an inpatient claim assigned a local or ICD-10 code for AMI. We used a standardized data abstraction form to collect the relevant information from an electronic medical records system. Abstracted information was then categorized by a single cardiologist as being either definite or not having AMI.

RESULTS

In a random sample of 200 patients, the average age was 67.7 years and the proportion of males was 78.0%. The PPV of the local or ICD-10 code for AMI was 82.5% in this sample of 200 patients. Further, of 178 patients who had an ICD-10 code for AMI based on any of the 7 types of condition codes in the DPC claims, the PPV was 89.3%, whereas of the 161 patients who had an ICD-10 code for AMI based on any of 3 major types of condition codes in the DPC claims, the PPV was 93.8%.

CONCLUSION

The PPV of the local or ICD-10 code for AMI was high for inpatient claims in Japan. The PPV was even higher for the ICD-10 code for AMI for those patients who received AMI care through the DPC case mix scheme. The current study was conducted in a single center, suggesting that a multi-center study involving different types of hospitals is needed in the future. The accuracy of condition codes for DPC claims in Japan may also be worth examining for conditions other than AMI such as stroke.

Authors+Show Affiliations

Division of Evaluation and Analysis of Drug Information, Keio University Faculty of Pharmacy, Tokyo, Japan.Department of Clinical Pharmacy, Nihon University School of Pharmacy, Chiba, Japan.Division of Evaluation and Analysis of Drug Information, Keio University Faculty of Pharmacy, Tokyo, Japan.Department of Biostatistics & Bioinformatics Graduate School of Medicine The University of Tokyo, Tokyo, Japan.Departments of Advanced Medical Science, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.Department of Cardiovascular Medicine, University of Tokyo, Tokyo, Japan.Duke Clinical Research Institute, Durham, NC, USA.NPO Drug Safety Research Unit Japan, Yushima 1-2-13-4F, Bunkyo-ku, Tokyo, 114-0002, Japan. kubotape-tky@umin.net.

Pub Type(s)

Journal Article
Validation Study

Language

eng

PubMed ID

30477501

Citation

Ando, Takashi, et al. "Positive Predictive Value of ICD-10 Codes for Acute Myocardial Infarction in Japan: a Validation Study at a Single Center." BMC Health Services Research, vol. 18, no. 1, 2018, p. 895.
Ando T, Ooba N, Mochizuki M, et al. Positive predictive value of ICD-10 codes for acute myocardial infarction in Japan: a validation study at a single center. BMC Health Serv Res. 2018;18(1):895.
Ando, T., Ooba, N., Mochizuki, M., Koide, D., Kimura, K., Lee, S. L., Setoguchi, S., & Kubota, K. (2018). Positive predictive value of ICD-10 codes for acute myocardial infarction in Japan: a validation study at a single center. BMC Health Services Research, 18(1), 895. https://doi.org/10.1186/s12913-018-3727-0
Ando T, et al. Positive Predictive Value of ICD-10 Codes for Acute Myocardial Infarction in Japan: a Validation Study at a Single Center. BMC Health Serv Res. 2018 Nov 26;18(1):895. PubMed PMID: 30477501.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Positive predictive value of ICD-10 codes for acute myocardial infarction in Japan: a validation study at a single center. AU - Ando,Takashi, AU - Ooba,Nobuhiro, AU - Mochizuki,Mayumi, AU - Koide,Daisuke, AU - Kimura,Koichi, AU - Lee,Seitetz L, AU - Setoguchi,Soko, AU - Kubota,Kiyoshi, Y1 - 2018/11/26/ PY - 2018/05/03/received PY - 2018/11/16/accepted PY - 2018/11/28/entrez PY - 2018/11/28/pubmed PY - 2019/1/24/medline KW - Acute myocardial infarction KW - Case mix KW - Diagnosis procedure combination KW - Positive predictive value; database KW - Validation study SP - 895 EP - 895 JF - BMC health services research JO - BMC Health Serv Res VL - 18 IS - 1 N2 - BACKGROUND: In Japan, several large healthcare databases have become available for research since the early 2000's. However, validation studies to examine the accuracy of these databases remain scarce. We conducted a validation study in order to estimate the positive predictive value (PPV) of local or ICD-10 codes for acute myocardial infarction (AMI) in Japanese claims. In particular, we examined whether the PPV differs between claims in the Diagnosis Procedure Combination case mix scheme (DPC claims) and in non-DPC claims. METHODS: We selected a random sample of 200 patients from all patients hospitalized at a large tertiary-care university hospital between January 1, 2009 and December 31, 2011 who had an inpatient claim assigned a local or ICD-10 code for AMI. We used a standardized data abstraction form to collect the relevant information from an electronic medical records system. Abstracted information was then categorized by a single cardiologist as being either definite or not having AMI. RESULTS: In a random sample of 200 patients, the average age was 67.7 years and the proportion of males was 78.0%. The PPV of the local or ICD-10 code for AMI was 82.5% in this sample of 200 patients. Further, of 178 patients who had an ICD-10 code for AMI based on any of the 7 types of condition codes in the DPC claims, the PPV was 89.3%, whereas of the 161 patients who had an ICD-10 code for AMI based on any of 3 major types of condition codes in the DPC claims, the PPV was 93.8%. CONCLUSION: The PPV of the local or ICD-10 code for AMI was high for inpatient claims in Japan. The PPV was even higher for the ICD-10 code for AMI for those patients who received AMI care through the DPC case mix scheme. The current study was conducted in a single center, suggesting that a multi-center study involving different types of hospitals is needed in the future. The accuracy of condition codes for DPC claims in Japan may also be worth examining for conditions other than AMI such as stroke. SN - 1472-6963 UR - https://www.unboundmedicine.com/medline/citation/30477501/Positive_predictive_value_of_ICD_10_codes_for_acute_myocardial_infarction_in_Japan:_a_validation_study_at_a_single_center_ L2 - https://bmchealthservres.biomedcentral.com/articles/10.1186/s12913-018-3727-0 DB - PRIME DP - Unbound Medicine ER -