CMAJ • January 15, 2008; 178 (2). doi:10.1503/cmaj.070150.
© 2008 Canadian Medical Association or its licensors
All editorial matter in CMAJ represents the opinions of the authors and not necessarily those of the Canadian Medical Association.
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Maternal age and risk of stillbirth: a systematic review

Ling Huang, MD MSc, Reg Sauve, MD MPH, Nicholas Birkett, MD MSc, Dean Fergusson, MHA PhD and Carl van Walraven, MD MSc

From the Health Surveillance and Epidemiology Division (Huang), Centre for Health Promotion, Public Health Agency of Canada, Ottawa, Ont.; the Departments of Paediatrics and of Epidemiology and Community Health Sciences (Sauve), University of Calgary, Calgary, Alta.; the Department of Epidemiology and Community Medicine (Birkett) and the Centre for Transfusion Research (Fergusson), University of Ottawa, Ottawa, Ont.; and the Clinical Epidemiology Program (Fergusson, van Walraven), Ottawa Health Research Institute, Ottawa, Ont.


Figure 121
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  		Figure 1: Selection of studies for systematic review. *Includes 3 studies identified through manual search.

 

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  		Table 1.

 

Figure 221
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  		Figure 2: Crude risk of stillbirth among older and younger women in 31 retrospective cohort studies and 6 case–control studies. The cutoff for the 2 age groups (younger v. older) was variable. OR = odds ratio, RR = risk ratio, CI = confidence interval.

 

Figure 321
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  		Figure 3: Crude and adjusted risk of stillbirth in the 11 retrospective cohort studies and 3 case–control studies that reported an adjusted odds ratio (OR) or risk ratio (RR). For the last case–control study (Smeeton et al46), the adjusted OR refers to the per-year increase in risk of stillbirth. Plurality refers to singleton v. multiple birth. CI = confidence interval.