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Stevens R, Alvergne A, Vitzthum VJ. Low haemoglobin in arduous seasons is associated with reduced chance of ovulation among women living in the Bolivian altiplano. Evol Med Public Health 2024; 12:191-203. [PMID: 39444585 PMCID: PMC11497615 DOI: 10.1093/emph/eoae022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 07/31/2024] [Indexed: 10/25/2024] Open
Abstract
Background and objectives Female reproductive function flexibly responds to ecological variation in energy availability, but the roles of other ecologically limited resources, such as iron, remain poorly understood. This analysis investigates whether haemoglobin associates with investment in reproductive function in a rural natural fertility population living in the Bolivian altiplano. Methodology We conducted a cross-sectional secondary analysis of prospectively collected biomarker and sociodemographic data, comprising 152 menstrual cycles from 96 non-contracepting women living at 3800 m altitude. Multivariable multilevel models were used to investigate (i) whether haemoglobin concentration is associated with ecological variation in subsistence strategy and seasonal conditions, and (ii) whether haemoglobin concentration is associated with the occurrence of ovulation and/or the concentration of luteal progesterone, two biomarkers of current investment in reproduction. Results Haemoglobin concentrations were lower in arduous seasons among those women more dependent on traditional agropastoral subsistence strategies (β = -0.42, 95% CI: -0.80 to -0.04, P = 0.032). During more arduous seasons, a 1 standard deviation increase in haemoglobin was associated with an over 3-fold increase in the odds of ovulation after adjusting for body fat, breastfeeding status, and age (adjusted odds ratio = 3.27, 95% CI: 1.10 to 9.27, P = 0.033). Conclusions and implications When conditions are relatively harsh and may be expected to improve, low haemoglobin levels are associated with lower current investment in reproduction and reduced fecundity. These results support the role of iron, independent of energy stores, as a limiting resource in modulating reproductive trade-offs.
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Affiliation(s)
- Rose Stevens
- School of Anthropology and Museum Ethnography, The University of Oxford, Oxford, OX2 6PE, UK
| | - Alexandra Alvergne
- School of Anthropology and Museum Ethnography, The University of Oxford, Oxford, OX2 6PE, UK
- ISEM, Univ Montpellier, CNRS, IRD, Montpellier, France
| | - Virginia J Vitzthum
- Department of Medicine, CEMCOR, University of British Columbia, CanadaV5Z 1M9
- Department of Anthropology, Indiana University, Bloomington, IN 47405, USA
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Burris ME, Caceres E, Chester EM, Hicks KA, McDade TW, Sikkink L, Spielvogel H, Thornburg J, Vitzthum VJ. Socioeconomic impacts on Andean adolescents’ growth. Evol Med Public Health 2022; 10:409-428. [PMID: 36090675 PMCID: PMC9454678 DOI: 10.1093/emph/eoac033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 08/10/2022] [Indexed: 11/14/2022] Open
Abstract
Background/Objectives We evaluated potential socioeconomic contributors to variation in Andean adolescents’ growth between households within a peri-urban community undergoing rapid demographic and economic change, between different community types (rural, peri-urban, urban) and over time. Because growth monitoring is widely used for assessing community needs and progress, we compared the prevalences of stunting, underweight, and overweight estimated by three different growth references. Methods Anthropometrics of 101 El Alto, Bolivia, adolescents (Alteños), 11.0–14.9 years old in 2003, were compared between households (economic status assessed by parental occupations); to one urban and two rural samples collected in 1983/1998/1977, respectively; and to the WHO growth reference, a representative sample of Bolivian children (MESA), and a region-wide sample of high-altitude Peruvian children (Puno). Results Female Alteños’ growth was positively associated with household and maternal income indices. Alteños’ height averaged ∼0.8SD/∼0.6SD/∼2SDs greater than adolescents’ height in urban and rural communities measured in 1983/1998/1977, respectively. Overweight prevalence was comparable to the WHO, and lower than MESA and Puno, references. Stunting was 8.5/2.5/0.5 times WHO/MESA/Puno samples, respectively. Conclusions/Implications Both peri-urban conditions and temporal trends contributed to gains in Alteños’ growth. Rural out-migration can alleviate migrants’ poverty, partly because of more diverse economic options in urbanized communities, especially for women. Nonetheless, Alteños averaged below WHO and MESA height and weight medians. Evolved biological adaptations to environmental challenges, and the consequent variability in growth trajectories, favor using multiple growth references. Growth monitoring should be informed by community- and household-level studies to detect and understand local factors causing or alleviating health disparities.
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Affiliation(s)
- Mecca E Burris
- Department of Anthropology, Indiana University , Bloomington, IN 47405, USA
| | | | - Emily M Chester
- Department of Anthropology, Indiana University , Bloomington, IN 47405, USA
- Evolutionary Anthropology Laboratory, Indiana University , Bloomington, IN 47405, USA
| | - Kathryn A Hicks
- Department of Anthropology, University of Memphis , Memphis, TN 38152, USA
| | - Thomas W McDade
- Department of Anthropology, Northwestern University , Evanston, IL 60208, USA
| | - Lynn Sikkink
- Department of Anthropology, Western Colorado University , Gunnison, CO 81231, USA
| | - Hilde Spielvogel
- Instituto Boliviano de Biología de Altura (IBBA) , La Paz , Bolivia
| | - Jonathan Thornburg
- Department of Astronomy & Center for Spacetime Symmetries, Indiana University , Bloomington, IN 47405, USA
| | - Virginia J Vitzthum
- Department of Anthropology, Indiana University , Bloomington, IN 47405, USA
- Evolutionary Anthropology Laboratory, Indiana University , Bloomington, IN 47405, USA
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Abstract
OBJECTIVES This study aims to understand if fatigue, the main symptom of anaemia, is a health concern that cues women and their referent groups to obtain iron folic acid supplements. DESIGN This is a mixed methods study that consisted of a cross-sectional perceptual mapping and card sorting activity along with 16 focus group discussions with women of reproductive age, mothers-in-law and men. Participants of the perceptual mapping and card sorting activity were asked to compare images of anaemia-related items and concepts. Participants in the focus group discussions were asked about their daily life, aspirations and concerns among women and perceptions of anaemia and iron supplementation in the community. The quantitative data were analysed through multidimensional scaling and analyses of variance in SPSS. The qualitative data were analysed through applied thematic analysis using NVivo. SETTING Bhubaneswar, Odisha, India. PARTICIPANTS Women of reproductive age (n=30), mothers-in-law (n=30) and married men (n=30) were randomly selected to participate in the perceptual mapping and card sorting exercise. A separate sample of each group was randomly selected for the focus group discussions (n=148). PRIMARY AND SECONDARY OUTCOME MEASURES We collected perceptions of dissimilarity between anaemia-related items, including fatigue and medical items; the extent to which these items were perceived as important to health or likable; and qualitative information about gender norms. RESULTS Cognitive maps and card sorting revealed that fatigue was conceptualised distinctly from items related to medical treatment and that perceptions around fatigue's importance to health were low. Women from the focus groups reported that fatigue is a regular part of their daily life. CONCLUSION Our results indicate that fatigue is currently not an adequate cue to seek treatment, perhaps due to the normalisation of fatigue as a part of women's daily life.
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Affiliation(s)
- Hagere Yilma
- Prevention and Community Health, The George Washington University Milken Institute of Public Health, Washington, District of Columbia, USA
| | - Erica Sedlander
- Prevention and Community Health, The George Washington University Milken Institute of Public Health, Washington, District of Columbia, USA
| | - Rajiv N Rimal
- Health, Behavior and Society, Johns Hopkins Bloomberg School of Public Health Center for Teaching and Learning, Baltimore, Maryland, USA
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Vitzthum VJ. Field methods and strategies for assessing female reproductive functioning. Am J Hum Biol 2020; 33:e23513. [PMID: 33022128 DOI: 10.1002/ajhb.23513] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 08/26/2020] [Accepted: 09/02/2020] [Indexed: 12/11/2022] Open
Abstract
A detailed understanding of female reproductive functioning is important to many disciplines including anthropology, evolutionary theory, demography, psychology, and biomedicine. In this article, I describe strategies and methods that have been used successfully in community-based studies of human reproduction, many in remote locales, to produce high quality biomarker data. These techniques are applicable to a wide range of research questions and populations, and to persons from adolescence through senescence. I give particular attention to the inherent challenges imposed by the cyclical and somewhat unpredictable nature of the hypothalamic-pituitary-ovarian axis including the necessity and difficulty of ascertaining the timing and occurrence of ovulation, the limits of different sampling regimes for capturing fluctuations in reproductive hormones, and the critical importance of recognizing and, when possible, reducing selection bias. I discuss the relative advantages and disadvantages of collecting saliva, urine, and dried blood spots, and describe some of the subtleties involved in collecting contamination-free samples. Once samples are collected, they must be stored in a manner that minimizes degradation; I describe techniques to keep samples cold even without access to electricity or dry ice. I also discuss various issues that should be considered during initial discussions with a laboratory and when samples are assayed by the laboratory. I include examples of techniques that have worked well in actual field studies, and examples of flawed analytical approaches that should be avoided. With these and other tools, even under technology-sparse conditions, researchers can investigate variability in human physiology across the breadth of human habitats.
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Affiliation(s)
- Virginia J Vitzthum
- Evolutionary Anthropology Laboratory, Department of Anthropology, Kinsey Institute, Indiana University, Bloomington, Indiana, USA
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Laurenzi CA, Skeen S, Coetzee BJ, Gordon S, Notholi V, Tomlinson M. How do pregnant women and new mothers navigate and respond to challenges in accessing health care? Perspectives from rural South Africa. Soc Sci Med 2020; 258:113100. [PMID: 32534304 DOI: 10.1016/j.socscimed.2020.113100] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Revised: 05/13/2020] [Accepted: 05/30/2020] [Indexed: 11/30/2022]
Abstract
Women in low- and middle-income countries and in contexts characterized by inequality face various interpersonal and structural barriers when accessing formal maternal and child health (MCH) services. These barriers persist even in contexts where programs to increase access to services, such as community health worker (CHW) interventions, have been implemented. However, while barriers to accessing care have been extensively documented, less is known about the diverse ways that women respond to, and navigate, these situations. This study explores strategies pregnant women and new mothers use to navigate and respond to health care barriers in a rural district in the Eastern Cape, South Africa. Twenty-six pregnant or recently delivered clients of the Enable Mentor Mother program were interviewed about their experiences of accessing formal MCH services. Interviews were conducted between February-March 2018 by an experienced isiXhosa-speaking research assistant, translated and transcribed into English, with transcripts coded and organized by themes using ATLAS.ti software. Facing resource shortages, inconsistent communication, and long travel times to clinics, participants employed diverse, innovative strategies to navigate interpersonal and structural barriers to care. While some participants chose to respond to barriers more passively-citing endurance and acceptance as practices of health system engagement-those participants who focused more on active responses tended to leverage their education, existing relationships, and available community resources to overcome barriers. Nevertheless, most participants described feelings of frustration and dejection. While CHW interventions may alleviate some of the burdens facing fragile health care systems in these contexts, these programs still rely on an underlying infrastructure of care that primary health care clinics and hospitals should be providing. Future programming should work in tandem with formal health systems and should support staff to improve quality of care provided to pregnant women, new mothers, and their infants to prioritize their health at a time of vulnerability.
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Affiliation(s)
- Christina A Laurenzi
- Institute for Life Course Health Research, Department of Global Health, 4009 Education Building, Faculty of Medical and Health Sciences, Stellenbosch University, Francie van Zijl Drive, Tygerberg, Western Cape, 7505, South Africa; Department of Psychology, Willcocks Building, Stellenbosch University, Stellenbosch, Western Cape, 7600, South Africa.
| | - Sarah Skeen
- Institute for Life Course Health Research, Department of Global Health, 4009 Education Building, Faculty of Medical and Health Sciences, Stellenbosch University, Francie van Zijl Drive, Tygerberg, Western Cape, 7505, South Africa
| | - Bronwyne J Coetzee
- Department of Psychology, Willcocks Building, Stellenbosch University, Stellenbosch, Western Cape, 7600, South Africa
| | - Sarah Gordon
- Institute for Life Course Health Research, Department of Global Health, 4009 Education Building, Faculty of Medical and Health Sciences, Stellenbosch University, Francie van Zijl Drive, Tygerberg, Western Cape, 7505, South Africa
| | - Vuyolwethu Notholi
- Institute for Life Course Health Research, Department of Global Health, 4009 Education Building, Faculty of Medical and Health Sciences, Stellenbosch University, Francie van Zijl Drive, Tygerberg, Western Cape, 7505, South Africa
| | - Mark Tomlinson
- Institute for Life Course Health Research, Department of Global Health, 4009 Education Building, Faculty of Medical and Health Sciences, Stellenbosch University, Francie van Zijl Drive, Tygerberg, Western Cape, 7505, South Africa; School of Nursing and Midwifery, Queens University, Medical Biology Centre, 97 Lisburn Road, Belfast, Northern Ireland BT9 7BL, United Kingdom
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A multilevel approach to correlates of anaemia in women in the Democratic Republic of Congo: findings from a nationally representative survey. Eur J Clin Nutr 2019; 74:720-731. [PMID: 31685966 DOI: 10.1038/s41430-019-0524-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 10/21/2019] [Accepted: 10/22/2019] [Indexed: 11/08/2022]
Abstract
BACKGROUND/OBJECTIVES Anaemia accounts for a significant proportion of pre- and post-partum morbidity and mortality in low-income countries with sequelae, including an increased risk of infection. Factors contributing to anaemia need to be addressed through the introduction of evidence-based measures to control and prevent the disease. We aimed to determine the prevalence of anaemia in women of child-bearing age in the Democratic Republic of Congo (DRC) and investigate the associated individual, household and community level factors. SUBJECTS/METHODS Cross sectional representative population data from the 2013-2014 DRC Demographic and Health Survey (DHS) was used. The primary outcome was anaemia in women, stratified according to pregnancy in those of child-bearing age. A haemoglobin level of below 11 g/dl for pregnant women and 12 g/dl for non-pregnant women was used as the indicator of anaemia. Using a three-level random intercept model this study explored risk factors at individual, household and community levels and quantified the observed and unobserved variations between households and communities. RESULTS Thirty-eight percent of women in the DRC are anaemic. Anaemia is significantly higher in younger, pregnant and underweight women, as well as those with comorbidities, including HIV and malaria who are living in the capital city Kinshasa. Anaemia varies within and between households and communities in the DRC. CONCLUSIONS Integrated approaches to reduce anaemia in settings with high malaria and HIV prevalence such as the DRC should target households.
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Vitzthum VJ, Thornburg J, Spielvogel H. Impacts of nocturnal breastfeeding, photoperiod, and access to electricity on maternal sleep behaviors in a non-industrial rural Bolivian population. Sleep Health 2018; 4:535-542. [PMID: 30442322 DOI: 10.1016/j.sleh.2018.09.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 09/25/2018] [Accepted: 09/29/2018] [Indexed: 11/17/2022]
Abstract
OBJECTIVES We tested 4 main predictions, derived from life history theory and self-evident human diurnality, regarding maternal sleep behaviors in a non-industrialized population in which mother-nursling co-sleeping is universal and prolonged: (1) Night breastfeeding incurs a sleep cost to co-sleeping mothers; (2) Night breastfeeding increases with infant age, causing mothers to sleep less; (3) Sleep duration co-varies with darkness duration; (4) Access to electricity reduces sleep duration. DESIGN Mothers self-recorded and reported nursing and sleep behaviors for a 48-hour period once per month (median = 5 months). SETTING Rural Bolivian altiplano homesteads, primarily reliant on agropastoralism, scattered throughout the countryside surrounding a main town (altitude 3800 m; 17°14'S, 65°55'W; darkness duration 10-12 hours over the year). PARTICIPANTS One hundred eighty-four co-sleeping mother-infant pairs (infant age 22-730 days). MEASUREMENTS Breastfeeding frequency, and retiring and rising times for 885 48-hour observation periods. RESULTS Maternal sleep duration covaried with darkness duration. Sleep duration was shorter in those with access to electricity (ie, living nearer to town) than those without access (more distant homesteads). Night breastfeeding rate was fairly steady until it began to decline after the first year postpartum. At a given infant age, higher night breastfeeding rates were associated with less maternal sleep. As their infants aged, mothers without electricity slept more, whereas mothers with access slept less. CONCLUSIONS During the first year postpartum, more frequent night nursing shortens maternal sleep more than any other predictor variable. For older infants, the effect of night nursing diminishes, and even modest "modernization" (eg, access to electricity) is associated with shorter maternal sleep.
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Affiliation(s)
- Virginia J Vitzthum
- Evolutionary Anthropology Laboratory, Indiana University, Bloomington, IN 47405, USA; Kinsey Institute, Indiana University, Bloomington, IN 47405, USA; Department of Anthropology, Indiana University, Bloomington, IN 47405, USA.
| | - Jonathan Thornburg
- Department of Astronomy, Indiana University, Bloomington, IN 47405, USA; Center for Spacetime Symmetries, Indiana University, Bloomington, IN 47405, USA
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