Identifying out-of-hospital cardiac arrest patients by using International Classification of Diseases codes and procedure code

Cho, Hyun Byul; Lee, Jong Seok; Lee, Chang Min; Jeong, Ki Young; Choi, Han Sung; Hong, Hoon Pyo

J Korean Soc Emerg Med > Volume 30(1); 2019 > Article

Original Article

Journal of The Korean Society of Emergency Medicine 2019;30(1): 8-15.

상병코드와 행위수가코드를 이용한 심정지 환자 색인

조현별¹, 이종석¹

, 이창민², 정기영¹, 최한성¹

, 홍훈표¹

¹경희대학교병원 응급의학과
²강동경희대학교병원 응급의학과

Identifying out-of-hospital cardiac arrest patients by using International Classification of Diseases codes and procedure code

Hyun Byul Cho¹, Jong Seok Lee¹

, Chang Min Lee², Ki Young Jeong¹, Han Sung Choi¹

, Hoon Pyo Hong¹

¹Department of Emergency Medicine, Kyung Hee University Hospital, Seoul
²Department of Emergency Medicine, Kyung Hee University Hospital at Kangdong, Seoul, Korea

Correspondence

Jong Seok Lee ,Tel: 02-958-1637, Fax: 02-958-8746, Email: seok918@hanmail.net,

Received: July 2, 2018; Revised: September 11, 2018 Accepted: October 3, 2018. Published online: February 28, 2019.

ABSTRACT

Objective:
This study was conducted to evaluate the validity of the International Classification of Diseases, 10th revision (ICD-10) codes for identifying patients who suffered out-of-hospital cardiac arrest (OHCA).
Method:
Consecutive data pertaining to adult patients who suffered OHCA or received ICD-10 codes for cardiac arrest were collected. Patient characteristics and clinical data during the period from January 2015 to December 2016 were obtained. The sensitivity and positive predictive value (PPV) of each code for identifying OHCA were calculated and an optimal algorithm using diagnostic and procedure codes to detect OHCA patients was selected. The kappa coefficient was calculated to examine the agreement between algorithm-detected cases and true OHCA patients.
Results:
A total of 397 patients were included in this study. The single use of ICD-10 codes was an insensitive method for identifying OHCA patients. Combination of diagnostic codes and procedure codes showed a good sensitivity (98.6%) and PPV (94.8%) for identifying OHCA patients. The agreement between the optimal algorithm and true OHCA was excellent (κ=0.970).
Conclusion:
Using ICD-10 codes for identifying OHCA patients is an insensitive method. The combination of ICD-10 codes and procedure codes can be an alternative search method.

Key words: ICD-10 codes; Procedure codes; Out-of-hospital cardiac arrest