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Table 2 Effect of treatment of HDP on maternal mortality from HDP using severe acute maternal morbidity (SAMM) case fatality rates in high income countries

From: Quantifying the fall in mortality associated with interventions related to hypertensive diseases of pregnancy

Author, year

Study population (year)

HDP-related conditions

Case fatality rate (Number of deaths/cases)

Mortality reduction a

    

Natural case fatality

    

25%

42%

Hogberg 1985 [12]

Sweden (1861-1880)

Eclampsia

42.0

-

-

 

Sweden (1881-1900)

Eclampsia

20.0

20.0%

52.4%

 

Sweden (1951-1955)

Eclampsia

13.9

44.4%

66.9%

 

Sweden (1971-1980)

Eclampsia

3.1

87.6%

92.6%

Douglas et al 1994 [67]

UK (1992)

Eclampsia

1.8% (7/382)

92.7%

95.6%

Waterstone et al 2001 [68]

South East Thames Region (1997-1998)

Severe pre-eclampsia, eclampsia and HELLP syndrome

0.4% (1/224)

98.2%

98.9%

Zhang et al 2005 [69]

Upper Austria (1996-1997)

evere pre-eclampsia, eclampsia and HELLP syndrome

0.0% (0/32)

100.0%

100.0%

 

Brussels, Belgium (1996)

 

0.0% (0/115)

100.0%

100.0%

 

Finland, 65% of deliveries (1996)

 

0.0% (0/86)

100.0%

100.0%

 

Four regions in France (1995)

 

0.4% (1/241)

98.3%

99.0%

 

Upper Danube, Hungary (1995)

 

0.0% (0/81)

100.0%

100.0%

 

Cork, Ireland (1996)

 

0.0% (0/9)

100.0%

100.0%

 

Puglia, Italy (1996-1997)

 

0.0% (0/19)

100.0%

100.0%

 

Oslo, Norway (1995)

 

0.0% (0/6)

100.0%

100.0%

Wen et al 2005 [70]

Canada (1991-1992)

Eclampsia

0.4% (4/973)

98.4%

99.0%

Knight et al 2007 [71]

UK (2005-2006)

Eclampsia

0.0% (0/214)

100.0%

100.0%

Zwart et al 2008 [72]

The Netherlands (2004-2006)

Eclampsia and HELLP syndrome

1.8% (4/222)

92.8%

95.7%

  1. a Mortality reduction was calculated as (Natural case fatality rate – SAMM fatality rate / Natural case fatality rate)