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Table 5 Research in context. Population-based studies of pregnancy-related ICU admissions

From: Variability in intensive care unit admission among pregnant and postpartum women in Canada: a nationwide population-based observational study

Studies Study period Study sites (country) No. of pregnancy-related ICU patients ICU admission rate Mortality (per 100,000 cases) Variability of ICU admission rate among hospitals
Harrison 2005 1995–2003 UK 1902 9.0 per 1000 ICU admissions Hospital mortality (26 per 100,000 all ICU admissions, 3049 per 100,000 pregnancy-related ICU admissions) Not described
Madan 2009 1997–2005 NJ, USA 15,447 15.4 per 1000 pregnancies Hospital mortality (12 per 100,000 pregnancies, 149 per 100,000 pregnancy-related ICU admissions) Not described
Wanderer 2013 1999–2008 MD, USA 2927 4.1 per 1000 pregnancies Hospital mortality (7.6 per 100,000 pregnancies, 1810 per 100,000 pregnancy-related ICU admissions) Not described
Chantry 2015 2006–2009 France 11,824 3.6 per 1000 pregnancies ICU mortality (4.7 per 100,000 pregnancies, 1294 per 100,000 pregnancy-related ICU admissions) Not described
Oud 2017 2001–2010 TX, USA 158,410 39 per 1000 pregnancies Hospital mortality (10 per 100,000 pregnancies, 261 per 100,000 pregnancy-related ICU admissions) Not described*
Aoyama 2019 2004–2015 Canada 10,204 3.2 per 1000 pregnancies Hospital mortality (6.2 per 100,000 pregnancies, 1274 per 100,000 pregnancy-related ICU admissions) MOR 1.92
  1. Systematic search. We searched MEDLINE, EMBASE, and Cochrane databases for studies published until September 2019. Search terms for ICU, Pregnancy, Admission, and Big data were combined (detailed search strategy in Additional file 12: Table S12). The reference lists of the selected papers were hand-searched for other potentially relevant papers. We have summarized all the relevant studies here as well as in the main text, but we were mainly interested in population-based studies relevant to our research question
  2. *Variability of pregnancy outcomes and categories of pregnancy-associated hospitalizations were reported