Indigenous Women’s Stress and Postpartum Depression: Discussions from the Canadian Maternity Experiences Survey and Indigenous Maternity Narratives

This doctoral research highlights Indigenous women’s experiences of stress and postpartum depression (PPD) through secondary quantitative analysis of the Public Health Agency of Canada’s Canadian Maternity Experiences Survey (2009) and qualitative Indigenous maternity narratives. Indigenous women’s responses to the survey demonstrate that Indigenous women experience 1.9 times higher odds of PPD and are 1.5 times as likely to be diagnosed with depression prior to pregnancy, compared to Canadian women. Indigenous women are also 1.3 times as likely to experience higher levels of stress and 3.3 times as likely to experience three or more stressful life events. While the survey demonstrates higher rates of stress and PPD, it is not culturally or contextually relevant. Therefore, Indigenous maternity narratives from 10 Indigenous mothers in 2015 further contextualize experiences of stress and PPD to include narratives related to adverse social determinants of health and impacts of colonialism. The research includes a discussion on the limitations of previous maternity research and the limits of clinical-medical assessments and diagnosis of stress and PPD in Indigenous populations. The research concludes with recommendations for additional maternity experiences research and ways to support Indigenous women, infants and children, birth partners, families, and communities.

Mental health indicators among pregnant Aboriginal women in Canada: results from the Maternity Experiences Survey

Introduction There is little research done on mental health among pregnant Aboriginal women. Therefore, the purpose of the study was to examine the prevalence of postpartum depression (PPD) and its determinants, including pre-existing depression among non-Aboriginal and Aboriginal women in Canada. Methods The Maternity Experiences Survey (MES) is a national survey of Canadian women’s experiences and practices before conception, up to the early months of parenthood. Predictors of PPD were calculated using the Mantel-Haenszel correction method relative to the risk estimates based on the odds ratio from adjusted regression analysis. The analysis was conducted among women who self-identified as Aboriginal (Inuit, Métis or First Nations living off-reserve) and those who identified as non-Aboriginal. Results The prevalence of pre-existing depression was higher among self-reported First Nations off-reserve and Métis women than non-Aboriginal women. Inuit women had the lowest prevalence of self-reported pre-existing depression, and Aboriginal women reported a higher prevalence of PPD than non-Aboriginal women. Pre-existing depression was not a predictor for PPD for Inuit or Métis women in this study but was a positive predictor among First Nations off-reserve and non-Aboriginal women. A disproportionally higher number of Aboriginal women reported experiencing abuse, as compared to non-Aboriginal women. Conclusion Our study demonstrated that common predictors of PPD including anxiety, experiencing stressful life events during pregnancy, having low levels of social support, and a previous history of depression were consistent among non-Aboriginal women. However, with the exception of the number of stressful events among First Nations offreserve, these were not associated with PPD among Aboriginal women. This information can be used to further increase awareness of mental health indicators among Aboriginal women.

Estimating bias in derived body mass index in the Maternity Experiences Survey

Introduction The objective of this study was to assess bias in the body mass index (BMI) measure in the Canadian Maternity Experiences Survey (MES) and possible implications of bias on the relationship between BMI and selected pregnancy outcomes. Methods We assessed BMI classification based on self-reported versus measured values. We used a random sample of 6175 women from the MES, which derived BMI from self-reported height and weight, and a random sample of 259 women who had previously given birth from the Canadian Health Measures Survey (CHMS), which derived BMI from self-reported and measured height and weight. Two correction equations were applied to self-reported based BMI, and the impact of these corrections on associations between BMI and caesarean section, small-for-gestational age (SGA) and large-for-gestational age (LGA) births was studied. Results Overall, 86.9% of the CHMS subsample was classified into the same BMI category based on self-reported versus measured data. However, misclassification had a substantial effect on the proportion of women in underweight and obese BMI categories. For example, 14.5% versus 20.8% of women were classified as obese based on self-reported data versus measured data. Corrections improved estimates of obesity prevalence, but over- and underestimated other BMI categories. Corrections had nonsignificant effects on the associations between BMI and SGA, LGA, and caesarean section. Conclusion While there was high concordance in BMI classification based on selfreported versus measured height and weight, bias in self-reported based measures may slightly over- or underestimate the risks associated with a particular BMI class. However, the general trend in associations is unaffected.