PAROS Publications

PAROS CRN Publications Committees and Publications of Studies

Publications Committee (PC)

Pan-Asian Resuscitation Outcomes Study (PAROS) Clinical Research Network (CRN) promotes research into resuscitation. The publication Committee is lead by the PAROS chairs, A/Prof Marcus Ong, Prof Sang Do Shin, Prof Hideharu Tanaka and Prof Matthew Ma, together with the PAROS EXCO.


paros-2-data-announcement Note: The data set is now available for secondary analysis and subjected to PAROS EXCO approval. Please submit your research ideas to the PAROS secretariat using the form below.

New/ Secondary Study Proposals Submission Process

paros-proposal-submission-process Note: Please use this form for submission

Study Timeline

Study lead has to complete and publish the study: 1.Within 2 years from the proposal approval date if it’s a secondary analysis of the existing data 2.Within 4 years from the proposal approval date if it’s a new study requiring additional data Note: If there is no publication after the stated timeline, your study will be withdrawn and the topic will be release to other interested members Appeal for extension will be granted on a case by case basis

Study Proposals

Paediatric OHCA Resuscitation Outcome (Tham Lai Peng)
Regional Variation in Outcomes of Witnessed VF OHCA in Asia (Dr Tatsuya Nishiuchi)
Characteristics and Outcomes of Young Adults who suffered an Out-of-Hospital Cardiac Arrest (Michael Chia)
Time Interval between Collapse and Return of Spontaneous Circulation between Various Outcomes in Out-of-Hospital Cardiac Arrest (Sumitro)
Supraglottic Airways and Endotracheal Intubation (Kentaro Kajino)
Model derivation and validation to explore relationship between presenting rhythm, subsequent shockable rhythm, response time and survival outcomes (Marcus Ong)
Relationship between bystander CPR and ventricular fibrillation (VF) as presenting rhythm for out-of-hospital cardiac arrest (OHCA) patients (Marcus Ong)
Associations between Gender and Cardiac Arrest Outcomes in Pan-Asian OHCA Patients (Ander Zhou)
Barriers to Dispatcher-Assisted Cardiopulmonary Resuscitation (DA-CPR) (Marcus Ong)
Resuscitation Academy (RA) 10-Step Implementations in the Pan-Asian Resuscitation Outcomes Study (PAROS) group (Marcus Ong)
Epidemiology of OHCA between developing and developed countries (Takahiro Hara)
Association of outcomes and resuscitation efforts amongst  OHCA occuring at night in the Asia Pacific - A prospective observational study (Andrew Ho)
Percutaneous coronary intervention provision and outcomes among cardiogenic out of hospital cardiac arrest in Asian countries (Takashi Tagami)
Treatments and outcomes among elderly patients with out-of-hospital cardiac arrest in Asian countries (Takashi Tagami)
Incidence of VF in Asian OHCA (Benjamin Leong)
Relationship between OHCA burden and cardiac arrest outcomes (Kuo Chan-Wei)
EMS Systems– “End-of-Life” Issues (Lin Chih-Hao)
Location Characteristics and The Outcome Impact on OHCA among PAROS (Patrick Ko)
Impact of heart disease on survival outcomes after out-of hospital cardiac arrest (Magdalene Lee)
Place-Provider Matrix and Time Interval to Initiation of CPR and Defibrillation After OHCA (Sang Do Shin)
Resuscitation time interval at the scene and outcomes after out-of-hospital cardiac arrest in PAROS communities (Sang Do Shin)
Survey on the utilization of ECMO for OHCA in current situation among PAROS communities (Patrick Ko)
Arrest to first compression time and survival outcome in witness OHCA (Yu Jin Lee)
Non-Cardiac OHCA in PAROS (Youngsun Ro)
EMS Training and Education (Takahiro Hara)
Pan-Asian Study of EMS Performance Indicators (Nik Hisamuddin)
Comparison of dispatcher-assisted cardiopulmonary resuscitation (DA-CPR) practices among Pan-Asian Countries: A web-based survey (Ng Yih Yng)
Asia EMS Survey on Ambulance Design and Safety Specifications (Sarah Karim) - no proposal submission (survey only, no PAROS data required)
A survey on public access defibrillation (PAD) implementation among PAROS members (Sheng-Wen Hou)
Asian Variation of Bystander-initiated Cardiopulmonary Resuscitation for Patients with Out-Of-Hospital Cardiac Arrest (Taku Iwami)
Early epinephrine administration after 119 call improve favorable neurological outcome in PAROS registry (Takahiro Hara)
EGDT/ Hypothermia (Patrick Ko)
In OHCAs, does shortening the response time effect survival? (Chiang Wen-Chu)
Characteristics and Temporal variability in OHCA in Asia (Dr Hyun Wook Ryoo)
The optimal field resuscitation time for survival of OHCA in ambulance- CPR system (Won-Chul Cha)
Developing and validating survival prediction model for Asian OHCA victims (Won-Chul Cha)
Predictive performance of Termination-Of-Resuscitation (TOR) rules in Asia: Are They Accurate Enough? (Huang Yu-Sheng)
Outcome Prediction for OHCA Patients Using Statistical Computation Approaches (Liu Nan)
The outcomes of traumatic or injured OHCA and ventricular Fibrillation (Chen Yen Pin)
Environmental exposure as a risk factor for out-of-hospital cardiac arrest (Andrew Ho)
Association between Response Time Interval and Favorable Neurologic Outcome according to Bystander CPR : Pan Asian Resuscitation Outcome Study (Hyun Wook Ryoo)
Interaction effect of bystander CPR on the association between time from call to first rhythm analysis and shockable presenting rhythm after out-of-hospital cardiac arrest (Jeogn Ho Park)
The influence of cancer on post-resuscitation treatments among out-of-hospital cardiac arrest patients (Joyce Kong)
The effect of initial ECG rhythm on the association between bystander cardio-pulmonary resuscitation (CPR) and outcomes after out-of-hospital cardiac arrest (OHCA) (Jung Eujene)
Interaction effects of communities and advanced airway management on survival after out-of-hospital cardiac arrest; Multi-level analysis. (Ki Ok Ahn)
The impact of early coronary angiography on clinical outcomes in out-of-hospital cardiac arrest (Lim Shir Lynn)
Monitoring the brain after cardiac arrest (Lim Shir Lynn)
Basic versus Advanced Life Support in Out-of-Hospital Cardiac Arrest: A Retrospective Study of the Pan-Asian Resuscitation Outcomes Study (PAROS) Registry Population (Mazen)
Utstein Factors and Outcomes in Traumatic Out-of-Hospital Cardiac Arrests (Michael Chia)
The effects of cancer on outcomes after out-of-hospital cardiac arrest (Joyce Kong)
Gender difference in out-of-hospital cardiac arrest survival by region in Asian countries (Lee Sun Young)
Pre-hospital Advanced Airway and Survival Outcomes after Paediatric Out-of-Hospital Cardiac Arrests (Tham Lai Peng)
The difference of on-scene resuscitation according to initial rhythm in patient with out-of-hospital cardiac arrest (Won Chul Cha)
Emergency department factors and outcomes of adult and paediatric out-of-hospital arrests in Pan-Asian Countries (Gene Ong)
Development and Validation of a Predictive Model for Early Neuro-Prognostication after OHCA (Liu Nan)
Variability of a first responder dispatch after out-of-hospital cardiac arrest among Asian countries (Sattha Riyapan)
Gender Disparities Among Recipients of Bystander CPR and AED in Pan-Asian Communities (Liu Nan)
Pediatric and Adult Non-Traumatic OHCA in Pan-Asian Countries in the time of COVID19 (Kenneth Doya G. Nonesa)
Early versus Late Intubation among Out-of-Hospital Cardiac Arrest Patients: A Prospective Observational Study (Daniel Unno H. Hiquiana)
Descriptive comparison of OHCA survival and predictors amongst the geriatric age group in Asia (Gayathri Devi Nadarajan)
Outcomes of OHCA patients stratified by mode of transport to the ED in Asia (Ivan Chua)
Use Artificial Intelligence and Deep Learning to Predict Clinical Outcomes for Out-of-Hospital Cardiac Arrest Patients (Liu Nan)
Development and Validation of the Pan-Asian ROSC After Cardiac Arrest (PA-RACA) Score (Liu Nan)
Temporal trends of non-shockable out-of-hospital cardiac arrest in Asia (Shir Lynn Lim)
Universal TOR rules and health economic outcomes if TOR is applied to the OHCA patients in Asia (Gayathri Devi Nadarajan)
The Validation and Development of TOR rules in Patients Following OHCA in Asia Countries (Hsu Shu-Hsien, Chiang Wen-Chu )
Pre-hospital airway for out-of-hospital cardiac arrest (Hansol Chang)
Developing a Time-Adaptive Prediction Model for Out-of-Hospital Cardiac Arrest: using PARSOS data (Ji woong Kim, Won Chul Cha, Hansol Chang)
Universal TOR rule predicts neurologically favorable outcome in Asian countries (Kentaro Kajino)
Trends of DA-CPR and bystander CPR rates in OHCA patients between intervention groups (basic, comprehensive, control) of DA-CPR Resuscitation Package (Ng Wei Lin)
Verification of the effect of introducing DA-CPR comprehensive package – a regression discontinuity design (Koshi Nakagawa, Hideharu Tanaka)
Association between drug administration and outcome after OHCA (Tatsuya Kaito , Hideharu Tanaka)
Association between advanced airway management and outcome after OHCA - propensity score analysis (Koshi Nakagawa, Hideharu Tanaka)
Evaluating variable importance in out-of-hospital cardiac arrest: an interpretable machine learning approach (Liu Nan)
The Asian EMS personnel preparedness in response to OHCA during the COVID 19 Pandemic (Patrick Tiglao)
Association between Activation Time Interval and Outcomes after Out-of-Hospital Cardiac Arrest (Wichayada Rangabpai, Sattha Riyapan, Sang Do Shin)
Association between age and bystander CPR in patients after out-of-hospital cardiac arrest among Pan-Asian countries (Shao Fei)
The Provision of bystander Cardiopulmonary Resuscitation for OHCA in Vietnam: Impact on Outcomes (using Vietnam data only) (Dung Tuan Dang, Chinh Quoc Luong, Son Ngoc Do, Tuan Anh Nguyen)


Park CB, Shin SD. Suh GJ, Ahn KO, Cha WC, Song KJ, Kim SJ, Lee EJ, Ong MEH. Pediatric out-of-hospital cardiac arrest in Korea: A nationwide population-based study. Resuscitation 2010 May; 81:512-517. IF=4.177
Ong MEH, Chiam TF, Ng FSP, Papia S, Lim SH, Leong BSH, Ong VYK, Tan E, Tham LP, Yap S, V Anantharaman. Reducing Ambulance Response Times Using Geospatial-Time Analysis of Ambulance Deployment. Acad Emerg Med 2010 Sep; 17(9):951-957. IF= 2.197
Ro YS, Shin SD, Noh H, Cho SI. Prevalence of positive carriage of tuberculosis, methicillin-resistant Staphylococcus aureus, and vancomycin-resistant Enterococci in patients transported by ambulance: a single center observational study. J Prev Med Public Health. 2012 May;45(3):174-80. doi: 10.3961/jpmph.2012.45.3.174.
Ahn KO, Shin SD, Suh GJ, Cha WC, Song KJ, Kim SJ, Lee EJ, Ong ME. Epidemiology and outcomes from non-traumatic out-of-hospital cardiac arrest in Korea: A nationwide observational study. Resuscitation 2010 Aug; 81(8):974-81. IF=4.177
Ong MEH, Earnest A, Shahidah N, Ng WM, Foo C, Nott DJ. Spatial Variation and Geographic-Demographic Determinants of Out-of-Hospital Cardiac Arrests in the City-State of Singapore. Annals of Emergency Medicine 2011 Jan; doi:10.1016/j.annemergmed.2010.12.014. IF=4.142
Noh H, Shin SD, Kim NJ, Ro YS, Oh HS, Joo SI, Kim JI, Ong ME. Risk Stratification-based Surveillance of Bacterial Contamination in Metropolitan Ambulances. Journal of Korean Medical Science 2011 Jan; 26(1):124-130. IF=0.84
Earnest A, Ong MEH, Shahidah N, Ng WM, Foo C, Nott DJ. Spatial Analysis of Ambulance Responses Times Related to Pre-hospital Cardiac Arrests in the City-State of Singapore. Pre-hospital Emergency Care. Accepted in July 2011. IF=1.3
Kajino K, Iwami T, Kitamura T, Daya M, Ong MEH, Nishiuchi T, Hayashi Y, Sakai T, Shimazu T, Hiraide A, Kishi M, Yamayoshi S. Comparison of supraglottic airway versus endotracheal intubation for the pre-hospital treatment of out-of-hospital cardiac arrest. Critical Care. Accepted in September 2011. IF=4.60
Song KJ, Shin SD, Ong MEH, Jeong JS. Can early serum levels of S100B protein predict the prognosis of patients with out-of-hospital cardiac arrest? Resuscitation 2010 Mar; 81:337-342. IF=4.177
Ong ME, Shin SD, Tanaka H, Ma MH, Khruekarnchana P, Hisamuddin N, Atilla R, Middleton P, Kajino K, Leong BS, Khan MN. Pan-Asian Resuscitation Outcomes Study (PAROS): rationale, methodology, and implementation. Acad Emerg Med. 2011 Aug;18(8):890-7.
Ong ME, Soon SS, Shin SD, Tanaka H, Ma MH. PAROS: Pan-Asian Resuscitation Outcomes Study Clinical Research Network. EMS India 2011 Oct; 17:2-4.
Soon SS, Tanaka H, Ma MH, Ong MEH. Collaboration in Pre-hospital Care Research: the Pan Asian Resuscitation Outcomes Study. International Paramedic Practice, Vol. 1, Iss. 3, 13 Mar 2012, pp 90 - 96.
Ong MEH, Mackey KE, Zhang ZC, Tanaka H, Ma MH, Swor R, Shin SD. Mechanical CPR devices compared to manual CPR during out-of-hospital cardiac arrest and ambulance transport: a systematic review. Scand J Trauma Resusc Emerg Med. 2012 Jun 18;20(1):39.
Shin SD, Ong MEH, Tanaka H, Ma MHM, Cone DC, Nishiuchi T, Omer A, Sarah AK, Khunkhlai N, Lin CH, Song KJ, Ryoo HW, Ryu HH, Tham LP. Comparison of Emergency Medical Services Systems across Pan-Asian Countries: A Web-based Survey. Prehospital Emergency Care. 2012,16(4):477-96. IF= 1.3
Goh ES, Liang BZ, Fook-Chong S, , Shahidah N, Soon SS, Yap S, Leong BSH, Gan HN, Foo C, Tham LP, Charles RA, Ong MEH. Effect of Location of Out-of-Hospital Cardiac Arrest on Survival Outcomes. Annals of the Academy of Medicine Singapore 2013; 42(9): 437-444. IF=1.362
Doctor NE, Yap S, Gan HN, Leong BSH, Goh ES, Chia MYC, Tham LP, Ng YY, Lim SH, Ong MEH. Recognition and Treatment of Out-Of-Hospital Cardiac Arrests by Non-Emergency Ambulance Service in Singapore. Annals of the Academy of Medicine Singapore 2013; 42(9): 445-450. IF=1.362
Kajino K, Kitamura T, Iwami T, Daya M, Ong ME, Hiraide A, Shimazu T, Kishi M, Yamayoshi S. Current termination of resuscitation (TOR) guidelines predict neurologically favorable outcome in Japan. Resuscitation 2013; 84(1):54-9. IF=3.96
Ong MEH, Cho J, Ma MHM, Tanaka H, Nishiuchi T, Omer A, Sarah AK, Khunkhlai N, Atilla R, Lin CH, Shahidah N, Lie D, Shin SD. Comparison of EMS Systems in The Pan-Asian Resuscitation Outcomes Study Countries: Report From A Literature Review And Survey. Emergency Medicine Australasia 2013; 25(1): 55–63. IF= 1.22
McNally B, Ong MEH. Cardiac arrest systems and survival after sudden cardiac arrest. Resuscitation 2013, 84(3):265-6. IF= 3.601. 
Ong MEH, Shin SD, Soon SS, Tanaka H, Ma MH, Song KJ, Nishiuchi T, Leong BSH, Sarah K, Lin CH, Ryoo HW, Ryu HH, Iwami T, Kajino K, Ko PCI, Lee KW, Sumetchotimaytha N, Swor R, Myers JB, Mackey K, McNally B. Recommendations on Ambulance Cardiopulmonary Resuscitation in Basic Life Support Systems. Prehospital Emergency Care 2013,17(4):491-500.  IF=1.3
Song KJ, Shin SD, Park CB, Kim JY, Kim DK, Kim CH, Young HS, Ong MEH, Bobrow BJ, McNally B. Dispatcher-Assisted Bystander Cardiopulmonary Resuscitation in a Metropolitan City: a Before- After Population-Based Study. Resuscitation 2014, 85(1):34-41. doi: 10.1016/j.resuscitation.2013.06.004. IF=4.177
Kajino K, Kitamura T, Iwami T, Daya M, Ong MEH, Nishiyama C, Sakai T, Tanigawa-Sugihara K, Hayashida S, Nishiuchi T, Hayashi Y, Hiraide A, Shimazu T. Impact of the number of on-scene emergency lifesaving technicians and outcomes from out-of-hospital cardiac arrest in Osaka city. Resuscitation 2014; 85(1): 59-64. IF=3.96Resuscitation 2014; 85(1): 59-64. IF=3.96
Ong MEH, Wah W, Hsu LY, Ng YY, Leong BSH, Goh ES, Gan HN, Tham LP, Charles RA, Foo DCG, Earnest A. Geographic Factors are Associated with Increased Risk for Out-of-Hospital Cardiac Arrests and Provision of Bystander Cardio-Pulmonary Resuscitation in Singapore. Resuscitation 2014; 85(9):1153-1160. IF= 3.96
Zakaria ND, Ong MEH, Gan HN, Foo D, Doctor N, Leong BSH, Goh ES, Ng YY, Tham LP, Charles R, Shahidah N, Sultana P, Anantharaman V. Implications for Public Access Defibrillation Placement by Non-traumatic Out-of-Hospital Cardiac Arrest Occurrence in Singapore. Emergency Medicine Australasia 2014; 26(3):229-236. IF=1.22
Tiah L, Kajino K, Alsakaf O, Baustista DCT, Ong MEH, Lie D, Naroo GY, Doctor NE, Chia MYC, Gan HN. Does Pre-hospital Endotracheal Intubation Improve Survival among Adults with Non-traumatic Out-of-hospital Cardiac Arrest? A Systematic Review. Western Journal of Emergency Medicine 2014, 25(7):750-757. Published online Oct 2014.
Ong MEH, Shin SD, Tanaka H, Ma MH, Nishiuchi T, Lee EJ, Ko PC, Edwin Doctor N, Khruekarnchana P, Naroo GY, Wong KD, Nakagawa T, Ryoo HW, Lin CH, Goh ES, Khunkhlai N, Alsakaf OA, Hisamuddin NA, Bobrow BJ, McNally B, Assam PN, Chan ES. Rationale, Methodology, and Implementation of a Dispatcher-assisted Cardiopulmonary Resuscitation Trial in the Asia-Pacific (Pan-Asian Resuscitation Outcomes Study Phase 2). Prehospital Emergency Care 2015; 19(1):87-95. IF=1.806 
Lai H, Choong CV, Fook-Chong S, Ng YY, Finkelstein EA, Haaland B, Goh ES, Leong BSH, Gan HN, Foo D, Tham LP, Charles R, Ong MEH. Interventional Strategies Associated with Improvements in Survival for Out-of-hospital Cardiac Arrests in Singapore over 10 years. Resuscitation 2015; 89(2015):155-161. IF=3.960 
Nik HR, Tanaka H, Shin SD, Ng YY, Piyasuwankul T, Lin CH, Ong MEH.Emergency medical services key performance measurement in Asian cities. International Journal of Emergency Medicine 2015, 8:12 doi:10.1186/s12245-015-0062-7. Published online 23 April 2015. 
Ong ME, Shin SD, De Souza NN, Tanaka H, Nishiuchi T, Song KJ, Ko PC, Leong BS, Khunkhlai N, Naroo GY, Sarah AK, Ng YY, Li WY, Ma MH; PAROS Clinical Research Network. Outcomes for out-of-hospital cardiac arrests across 7 countries in Asia: The Pan Asian Resuscitation Outcomes Study (PAROS). Resuscitation. 2015 Jul 30;96:100-108. doi: 10.1016/j.resuscitation.2015.07.026.
Lin CH, Ng YY, Chiang WC, Karim SA, Shin SD, Tanaka H, Nishiuchi T, Kajino K, Khunkhlai N, Ma MH, Ong ME; Variation of current protocols for managing out-of-hospital cardiac arrest in prehospital settings among Asian countries. J Formos Med Assoc. 2015 Nov 17. pii: S0929-6646(15)00341-1. doi: 10.1016/j.jfma.2015.10.003.
Kajino K, Kitamura T, Kiyohara K, Iwami T, Daya M, Hock Ong ME, Shimazu T, Sadamitsu D. Temporal Trends in Outcomes after Out-of-Hospital Cardiac Arrests Witnessed by Emergency Medical Services in Japan: A Population-Based Study. Prehosp Emerg Care. 2016 Feb 6:1-8. [Epub ahead of print]. DOI:10.3109/10903127.2015.1115931
Mao RD, Ong ME; Public access defibrillation: improving accessibility and outcomes. Br Med Bull. 2016 Mar 31. pii: ldw011.
Mao DR, Ong ME; High-rise residential resuscitation: scaling the challenge. CMAJ. 2016 Apr 5;188(6):399-400. doi: 10.1503/cmaj.151044.
Harjanto S, Na MX, Hao Y, Ng YY, Doctor N, Goh ES, Leong BS, Gan HN, Chia MY, Tham LP, Cheah SO, Shahidah N, Ong ME; PAROS study group; A before-after interventional trial of dispatcher-assisted cardio-pulmonary resuscitation for out-of-hospitalcardiac arrests in Singapore. Resuscitation. 2016 May;102:85-93. doi: 10.1016/j.resuscitation.2016.02.014.
Ng YY, Wah W, Liu N, Zhou SA, Ho AF, Pek PP, Shin SD, Tanaka H, Khunkhlai N, Lin CH, Wong KD, Cai WW, Ong ME; PAROS Clinical Research Network; Associations between gender and cardiac arrest outcomes in Pan-Asian out-of-hospital cardiac arrest patients. Resuscitation. 2016 May;102:116-21. doi: 10.1016/j.resuscitation.2016.03.002.
Wah W, Wai KL, Pek PP, Ho AF, Alsakaf O, Chia MY, Noor JM, Kajino K, De Souza NN, Ong ME; PAROS Investigators. Collaborators (4): Khruekarnchana P, Tham LP, Leong BS, Tiah L. Conversion to shockable rhythms during resuscitation and survival for out-of hospital cardiac arrest. Am J Emerg Med. 2017 Feb;35(2):206-213. doi: 10.1016/j.ajem.2016.10.042. Epub 2016 Oct 25.
Chia MY, Lu QS, Rahman NH, Doctor NE, Nishiuchi T, Leong BS, Tham LP, Goh ES, Tiah L, Monsomboon A, Ong ME; PAROS Clinical Research Network; Characteristics and outcomes of young adults who suffered an out-of-hospital cardiac arrest (OHCA). Resuscitation. 2017 Feb;111:34-40. doi: 10.1016/j.resuscitation.2016.11.019. Epub 2016 Dec 5.
Tanaka H, Takyu H, Sagisaka R, Ueta H, Shirakawa T, Kinoshi T, Takahashi H, Nakagawa T, Shimazaki S, Ong MEH. Favorable neurological outcomes by early epinephrine administration within 19 minutes after EMS call for out-of-hospital cardiac arrest patients. The American Journal of Emergency Medicine 2016; 34(12): 2284-2290. IF=1.274
Sim ZJ, Ho AFW, Shahidah N, Hao Y, Ng YY, Leong BSH, Zarinah S, Teo WKL, Goh GSY, Jaafar H, Ong MEH. Barriers to Dispatcher-Assisted Cardiopulmonary Resuscitation in Singapore. Resuscitation 2016; 105:149-155. IF=4.167
Lee MH, Fook-Chong S, Wah W, Shin SD, Nishiuchi T, Ko PC, Naroo GY, Wong KD, Tiah L, Monsomboon A, Siddiqui FJ, Ong ME; PAROS Clinical Research Network; Effect of known history of heart disease on survival outcomes after out-of-hospital cardiac arrests. Emerg Med Australas. 2018 Feb;30(1):67-76. doi: 10.1111/1742-6723.12809. Epub 2017 May 31
Doctor NE, Ahmad NS, Pek PP, Yap S, Ong ME; The Pan-Asian Resuscitation Outcomes Study (PAROS) clinical research network: what, where, why and how. Singapore Med J. 2017 Jul;58(7):456-458. doi: 10.11622/smedj.2017057.
Kim YJ, Ryoo HW, Shin SD, Song KJ, Ro YS, Lee KW, Ma MH, Ko PC, Gan HN, Shahidah N; Diurnal variation in outcomes after out-of-hospital cardiac arrest in Asian communities: The Pan-Asian Resuscitation Outcomes Study. Emerg Med Australas. 2017 Oct;29(5):551-562. doi: 10.1111/1742-6723.12822. 
Hideharu Tanaka, Marcus E. H. Ong, Fahad J. Siddiqui, Matthew H. M. Ma, Hiroshi Kaneko, Kyung Won Lee, Kentaro Kajino, Chih-Hao Lin, Han Nee Gan, Pairoj Khruekarnchana, Omer Alsakaf, Nik H. Rahman, Nausheen E. Doctor, Pryseley Assam, Sang Do Shin, PAROS Clinical Research Network; Modifiable Factors Associated With Survival After Out-of-Hospital Cardiac Arrest in the Pan-Asian Resuscitation Outcomes Study. Ann Emerg Med. 2017 Oct 3. pii: S0196-0644(17)31384-7. doi: 10.1016/j.annemergmed.2017.07.484. [Epub ahead of print]
Kim TH, Lee K, Shin SD, Ro YS, Tanaka H, Yap S, Wong KD, Ng YY, Piyasuwankul T, Leong B; Association of the Emergency Medical Services-Related Time Interval with Survival Outcomes of Out-of- Hospital Cardiac Arrest Cases in Four Asian Metropolitan Cities Using the Scoop-and Run Emergency Medical Services Model. J Emerg Med. 2017 Nov;53(5):688-696.e1. doi: 10.1016/j.jemermed.2017.08.076.
Tham LP, Wah W, Phillips R, Shahidah N, Ng YY, Shin SD, Nishiuchi T, Wong KD, Ko PC, Khunklai N, Naroo GY, Ong MEH; Epidemiology and outcome of paediatric out-of-hospital cardiac arrests: A paediatric sub-study of the Pan-Asian resuscitation outcomes study (PAROS). Resuscitation. 2018 Feb 5. pii: S0300-9572(18)30049-2. doi: 10.1016/j.resuscitation.2018.01.040. [Epub ahead of print]
Chong SL, Laerdal T, Cordero J, Khursheed M, Haedar A, Cai W, Nadarajan GD, Ho AFW, Pek PP, Chan SKT, Ong MEH; Global resuscitation alliance consensus recommendations for developing emergency care system: Reducing perinatal mortality.  Resuscitation. 2018 Oct 4;133:71-74. doi: 10.1016/j.resuscitation.2018.09.027. [Epub ahead of print]
Nadarajan GD, Tiah L, Ho AFW, Azazh A, Castren MK, Chong SL, El Sayed MJ, Hara T, Leong BS, Lippert FK, Ma MHM, Ng YY, Ohn HM, Overton J, Pek PP, Perret S, Wallis LA, Wong KD, Ong MEH; Global resuscitation alliance utstein recommendations for developing emergency care systems to improve cardiac arrest survival.  Resuscitation. 2018 Nov;132:85-89. doi: 10.1016/j.resuscitation.2018.08.022. Epub 2018 Aug 29.
Ho AFW, Wah W, Earnest A, Ng YY, Xie Z, Shahidah N, Yap S, Pek PP, Liu N, Lam SSW, Ong MEH; Singapore PAROS Investigator; Health impacts of the Southeast Asian haze problem - A time-stratified case crossover study of the relationship between ambient air pollution and sudden cardiac deaths in Singapore. Int J Cardiol. 2018 Nov 15;271:352-358. doi: 10.1016/j.ijcard.2018.04.070.
Rakun A, Allen J, Shahidah N, Ng YY, Leong BS, Gan HN, Mao D, Chia MYC, Cheah SO, Tham LP, Ong MEH; Ethnic and Neighborhood Socioeconomic Differences In Incidence and Survival From Out Of Hospital Cardiac Arrest In Singapore. Prehosp Emerg Care. 2018 Dec 22:1-12. doi: 10.1080/10903127.2018.1558317. [Epub ahead of print]
Ho AFW, Hao Y, Pek PP, Shahidah N, Yap S, Ng YY, Wong KD, Lee EJ, Khruekarnchana P, Wah W, Liu N, Tanaka H, Shin SD, Ma MH, Ong MEH; PAROS Clinical Research Network; Outcomes and modifiable resuscitative characteristics amongst pan-Asian out-of-hospital cardiac arrest occurring at night. Medicine (Baltimore). 2019 Mar;98(10):e14611. doi: 10.1097/MD.0000000000014611.
Kang SB, Kong SYJ, Shin SD, Ro YS, Song KJ, Hong KJ, Kim THEffect of cancer history on post-resuscitation treatments in out-of-hospital cardiac arrest.Resuscitation. 2019 Apr;137:61-68. doi: 10.1016/j.resuscitation.2019.02.005. 
Lian TW, Allen JC, Ho AFW, Lim SH, Shahidah N, Ng YY, Doctor N, Leong BSH, Gan HN, Mao DR, Chia MYH, Cheah SO, Tham LP, Ong MEH; Effect of vertical location on survival outcomes for out-of-hospital cardiac arrest in Singapore. Resuscitation. 2019 Apr 3;139:24-32. doi: 10.1016/j.resuscitation.2019.03.042.
Tagami T, Tanaka H, Shin SD, Ma MH, Ko PC, Karim S, Khruekarnchana P, Naroo GY, Ong MEHImpact of population aging on the presentation of out-of-hospital cardiac arrest in the Pan Asian Resuscitation Outcomes Study. Acute Med Surg. 2019 May 22;7(1):e430. doi: 10.1002/ams2.430. eCollection 2020 Jan-Dec.
Shawn Chieh Loong Lee, Desmond Renhao Mao, Yih Yng Ng, Benjamin Sieu-Hon Leong, Jirapong Supasaovapak, Faith Joan Gaerlan, Do Ngoc Son, Boon Yang Chia, Sang Do Shin, Chih-Hao Lin, G. V. Ramana Rao, Takahiro Hara, Marcus Eng Hock Ong and For the PAROS Clinical Research Network; Emergency medical dispatch services across Pan-Asian countries: a web-based survey. BMC Emergency Medicine (2020) 20:1
Wei Y, Pek PP, Doble B, Finkelstein EA, Wah W, Ng YY, Cheah SO, Chia MYC, Leong BSH, Gan HN, Mao DRH, Tham LP, Fook-Chong S, Ong MEH; Strategies to improve survival outcomes of out-of-hospital cardiac arrest (OHCA) given a fixed budget: A simulation study. Resuscitation. 2020 Feb 3;149:39-46. doi: 10.1016/j.resuscitation.2020.01.026. 
Liu N, Ong MEH, Ho AFW, Pek PP, Lu TC, Khruekarnchana P, Song KJ, Tanaka H, Naroo GY, Gan HN, Koh ZX, Ma MH; PAROS Clinical Research Network; Validation of the ROSC after cardiac arrest (RACA) score in Pan-Asian out-of-hospital cardiac arrest patients. Resuscitation. 2020 Feb 5;149:53-59. doi: 10.1016/j.resuscitation.2020.01.029. 
Young Seok Oh, Ki Ok Ahn, Sang Do Shin, Kentaro Kagino, Tatsuya Nishiuchi, Matthew Ma, Patrick Ko, Marcus Eng Hock Ong, Ng Yih Yng, Benjamin Leong; Variability in the effects of prehospital advanced airway management on outcomes of patients with out-of-hospital cardiac arrest. Clin Exp Emerg Med. 2020 Jun;7(2):95-106. doi: 10.15441/ceem.19.022. Epub 2020 Jun 30.
 Sungbae Moon, Hyun Wook Ryoo, Jae Yun Ahn, Dong Eun Lee, Sang Do Shin, Jeong Ho Park; Association of response time interval with neurological outcomes after out-of-hospital cardiac arrest according to bystander CPR. Am J Emerg Med. 2020 Sep;38(9):1760-1766. doi: 10.1016/j.ajem.2020.05.108. Epub 2020 Jun 2.
Son N Do, Chinh Q Luong, Dung T Pham, Chi V Nguyen, Tra T Ton, Thao TN Pham, Quoc TA Hoang, Hanh T Hoang, Dat T Nguyen, Dai Q Khuong, Quan H Nguyen, Tuan A Nguyen, Hanh TM Pham, My H Nguyen, Bryan F McNally, Marcus EH Ong & Anh D Nguyeng; Survival after out-of-hospital cardiac arrest, Viet Nam: multicenter prospective cohort study. Bull World Health Organ. 2021 Jan 1;99(1):50-61. doi: 10.2471/BLT.20.269837. Epub 2020 Oct 28. 
Shir Lynn Lim, Yee How Lau, Mark Y. Chan, Terrance Chua, Huay Cheem Tan, David Foo, Zhan Yun Lim, Boon Wah Liew, Nur Shahidah, Desmond R. Mao, Si Oon Cheah, Michael Y. C. Chia, Han Nee Gan, Benjamin S. H. Leong, Yih Yng Ng, Khung Keong Yeo and Marcus E. H. Ong B; Early Coronary Angiography Is Associated with Improved 30-Day Outcomes among Patients with out-of-Hospital Cardiac Arrest. J Clin Med. 2021 Nov 6;10(21):5191. doi: 10.3390/jcm10215191.
Wong XY, Ang YK, Li K, Chin YH, Lam SSW, Tan KBK, Chua MCH, Ong MEH, Liu N, Pourghaderi AR, Ho AFW; PAROS Singapore Investigators; Development and validation of the SARICA score to predict survival after return of spontaneous circulation in out of hospital cardiac arrest using an interpretable machine learning framework. Resuscitation. 2022 Jan;170:126-133. doi: 10.1016/j.resuscitation.2021.11.029. Epub 2021 Nov 26.
Limkakeng AT, Ye JJ, Staton C, Yng Ng Y, Sh Leong B, Shahidah N, Yazid M, Gordee A, Kuchibhatla M, Eh Ong M; Singapore PAROS Investigators; Impact of Dispatcher-Assisted Cardiopulmonary Resuscitation on Performance of Termination of Resuscitation Criteria. Resuscitation. 2022 Jan;170:160-166. doi: 10.1016/j.resuscitation.2021.11.034. Epub 2021 Dec 3.
Nan Liu, Mingxuan Liu, XinruChen, Yilin Ning, Jin Wee Lee, Fahad Javaid Siddiqui, SeyedEhsan Saffari, Andrew Fu Wah Ho, Sang Do Shin, Matthew Huei-Ming Ma, Hideharu Tanaka, and Marcus Eng Hock Ong, For the PAROS Clinical Research Network Investigators. Development and validation of an interpretable prehospital return of spontaneous circulation (P-ROSC) score for patients with out-of-hospital cardiac arrest using machine learning: A retrospective study. EClinicalMedicine. 2022 May 6;48:101422. doi: 10.1016/j.eclinm.2022.101422. eCollection 2022 Jun.
Lai Peng ThamStephanie Fook-ChongNur Shahidah Binte AhmadAndrew Fu-Wah HoHideharu TanakaSang Do ShinPatrick Chow-In KoKwanhathai Darin WongSupasaowapak JirapongG V Ramana RaoWenwei CaiSaad Al QahtaniMarcus Eng Hock OngPan-Asian Resuscitation Outcomes Study Clinical Research Network; Pre-Hospital Airway Management and Survival Outcomes after Paediatric Out-of-Hospital Cardiac Arrests. Resuscitation. 2022 Jul;176:9-18.   (click here for the letter to the editor addressing the potential selection bias in the baseline)
Shu-Hsien Hsu, Jen-Tang Sun, Edward Pei-Chuan Huang, Tatsuya Nishiuchi, Kyoung Jun Song, Benjamin Leong, Nik Hisamuddin Nik Ab Rahman, Pairoj Khruekarnchana, G Y Naroo, Ming-Ju Hsieh, Shu-Hui Chang, Wen-Chu Chiang, Matthew Huei-Ming Ma. The predictive performance of current termination-of-resuscitation rules in patients following out-of-hospital cardiac arrest in Asian countries: A cross-sectional multicentre study. PLoS One. 2022 Aug 10;17(8):e0270986. doi: 10.1371/journal.pone.0270986. eCollection 2022
Magdalene Hui Min Lee, Michael Yih Chong Chia, Stephanie Fook-Chong, Nur Shahidah, Takashi Tagami, Hyun Ho Ryu, Chih-Hao Lin, Sarah Abdul Karim, Supasaowapak Jirapong, H V Rajanarsing Rao, Wenwei Cai, Bernadett Pua Velasco, Nadeem Ullah Khan, Do Ngoc Son, G Y Naroo, Mazen El Sayed, Marcus Eng Hock Ong. Characteristics and Outcomes of Traumatic Cardiac Arrests in the Pan-Asian Resuscitation Outcomes Study. Prehosp Emerg Care. 2022 Sep 6;1-9.doi: 10.1080/10903127.2022.2113941.
Andrew Fu Wah Ho, Jamie S Y Ho, Benjamin Yong-Qiang Tan, Seyed Ehsan Saffari, Jun Wei Yeo, Ching-Hui Sia, Meng Wang, Joel Aik, Huili Zheng, Geoffrey Morgan, Wilson Wai San Tam, Wei Jie Seow, Marcus Eng Hock Ong, PAROS Singapore Investigators. Air quality and the risk of out-of-hospital cardiac arrest in Singapore (PAROS): a time series analysis. Lancet Public Health. 2022 Nov;7(11):e932-e941. doi: 10.1016/S2468-2667(22)00234-1.
Ingvild B M Tjelmeland, Jan Wnent, Siobhan Masterson, Jo Kramer-Johansen, Marcus Eng Hock Ong, Karen Smith, Eirik Skogvoll, Rolf Lefering, Shir Lynn Lim, Nan Liu, Bridget Dicker, Andrew Swain, Stephen Ball, Jan-Thorsten Gräsner; CARES Surveillance Group and the Lockdown and bystander CPR group. Did lockdown influence bystanders' willingness to perform cardiopulmonary resuscitation? A worldwide registry-based perspective. Resuscitation. 2023 Mar 18;109764. doi: 10.1016/j.resuscitation.2023.109764.