International Partners
The INTERSECT study partnership includes collaborators from over 50 countries. Principal investigators in each country are responsible for conducting the INTERSECT survey in their own country. Anonymised data from each country are then linked to create an international databank of information on traumatic birth and PTSD worldwide. The first dataset was released in 2024 and has data from 31 countries and 11,302 women. It is available on application through the UK Data Service. A second release of the dataset with more countries is planned for 2026. If you are interested in conducting INTERSECT in your country please email intersect@city.ac.uk.
The study will provide information on the cross-cultural prevalence of postpartum PTSD, as well as differences in the etiology and manifestation of childbirth-related PTSD worldwide.
Japan
Principal Investigators
Daisuke Nishi
Collaborators
Saki Doi
Institutions
The University of Tokyo
Contribution to Dataset
Version 2 (2026)
Kazakhstan
Principal Investigators
Aituar Kospakov & Prof Anar Uyzbayeva
Collaborators
None
Institutions
Al-Farabi Kazakh National University, Kazakhstan
Contribution to Dataset
Kenya
Principal Investigators
Dr Cox Tamba
Collaborators
None
Institutions
Egerton University
Contribution to Dataset
Version 2 (2026)
Latvia
Principal Investigators
Dr (psych) Ilona Krone
Collaborators
Association of Midwives of Latvia; Psychology Laboratory RSU
Institutions
Rīga Stradiņš University
Contribution to Dataset
Version 2 (2026)
Lithuania
Principal Investigators
Prof Olga Riklikiene & Assoc. prof. Gabija Jarašiūnaitė-Fedosejeva
Collaborators
Ernesta Sakalauskiene, Dangyra Ruseckiene, Asta Kirkilytė
Institutions
Lithuanian University of Health Sciences, Vytautas Magnus University
Contribution to Dataset
Version 1 (2023)
Malawi
Principal Investigators
Genesis Chorwe-Sungani, Robert Stewart
Collaborators
Elizabeth Mwangala
Institutions
Kamuzu University of Health Sciences, Malawi
Contribution to Dataset
Version 1 (2023)
Malaysia
Principal Investigators
Dr. Yuzainov binti Ahmad
Collaborators
Dr. Ravinderjit Kaur a/p Nagindar Singh, Dr. Anusha Asairinachan, Dr. Pavithra a/p Subramaniam, Dr. Ranjit Singh a/l Bhagwan Singh, Dr. Ooi Ziun Gie, Dr. Almas Shaza binti Ahmad Khushairy
Institutions
RUMC (RCSI & UCD Malaysia Campus), Pulau Pinang Hospital, Seberang Jaya Hospital
Contribution to Dataset
Version 2 (2026)
Malta
Principal Investigators
Prof Jean Calleja-Agius
Collaborators
Ms Claire Zerafa, Dr Rita Pace Parascandalo, Prof Neville Calleja
Institutions
Faculty of Medicine and Surgery, University of Malta, Faculty of Health Sciences, University of Malta, Mater Dei Hospital
Contribution to Dataset
Version 2 (2026)
Montenegro
Principal Investigators
Dr Tea Dakić & Dr Aleksandra Ražnatović
Collaborators
None
Institutions
Clinical Center of Montenegro
Contribution to Dataset
Version 2 (2026)
Nepal
Principal Investigators
Dr Narenda Singh Thagunna
Collaborators
Khem Raj Bhatta, Ramesh Bhatta, Renu Khayamali
Institutions
Tribhuvan University, Yeti Health Science Academy, Psychdesk Foundation
Contribution to Dataset
Version 1 (2023)
Netherlands
Principal Investigators
Dr Hilmar Bijma
Collaborators
Dr Claire Stramrood, Dr Martine Hollander, Dr Marielle van Pampus
Institutions
Erasmus University Rotterdam, OLVG Amsterdam & Radboud University Medical Centre, The Netherlands
Contribution to Dataset
Version 2 (2026)
New Zealand
Principal Investigators
Prof Clare Harvey
Collaborators
None
Institutions
Massey University, New Zealand
Contribution to Dataset
Version 2 (2026)
Supporting Organisations
"[Having] an international data bank that could be accessed by researchers worldwide would provide an enormously valuable resource… Such a databank would enable health systems to improve maternity care in ways that could reduce the elements that women find traumatic.” Birth Trauma Association