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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