G R Bentley
Biographic Data
| ID | 2282 |
|---|---|
| NAME | G R Bentley |
| GIVEN NAMES | G R |
| FAMILY NAME | Bentley |
| SIGNATURE | BENTLEY G R |
| AFFILIATIONS | Durham University |
| ORCID | 0000-0002-2009-5540 |
| VERIFIED | Yes |
| TOTAL WORKS | 14 |
| TOTAL CITATIONS | 3 |
| AUTHOR COUNT | 14 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1993 |
| LATEST PUBLICATION YEAR | 2024 |
| H-INDEX | 1 |
Religious minority identity associates with stress and psychological health among Muslim and Hindu women in Bangladesh and London
OBJECTIVES: This study examined the association of minority religious identification (Hindu or Muslim) with self-reported stress and psychological symptoms among sedentee and immigrant Bangladeshi women. METHODS: Women, aged 35-59 (n = 531) were drawn from Sylhet, Bangladesh and London, England. Muslim immigrants in London and Hindu sedentees in Sylhet represented minority religious identities. Muslim sedentees in Sylhet and Londoners of European…
No impact of developmental conditions on serum estradiol levels among Bangladeshi women in the UK and Bangladesh
INTRODUCTION: While many aspects of female ovarian function respond to environmental stressors, estradiol (E2) appears less sensitive to stressors than progesterone, except under extreme ecological conditions. However, earlier studies relied on saliva samples, considered less sensitive than blood. Here, we investigated E2 variation among 177 Bangladeshi and UK white women, aged 35-59, using single serum samples. Bangladeshi women either grew up i…
The timing of adrenarche in Maya girls, Merida, Mexico
BACKGROUND: Adrenarche involves maturation of the hypothalamic-pituitary-adrenal axis and increased production of dehydroepiandrosterone and its sulfate ester, dehydroepiandrosterone-sulfate (DHEA-S). It occurs at ages 6 to 8 in industrialized populations, marking the transition from childhood to juvenility and cognitive development at middle childhood. Studies in subsistence level populations indicate a later age (8-9) for adrenarche, but only t…
Don't blame the Bame: Ethnic and structural inequalities in susceptibilities to Covid ‐19
One of the striking features emerging from the COVID-19 pandemic has been the early recognition of ethnic disparities in both vulnerability to contracting the disease, as well as its outcome. These disparities were first reported in news outlets (Blow, 2020; Cowan, 2020; Godin, 2020; The Guardian, 2020a) and, more recently, verified in academic journals (e.g., Bhala, Curry, Martineau, Agyeman, & Bhopal, 2020; Khunti, Singh, Pareek, & Hanif, 2020;…
Assessing Endogenous and Exogenous Hormone Exposures and Breast Development in a Migrant Study of Bangladeshi and British Girls
Timing of breast development (or thelarche) and its endogenous and exogenous determinants may underlie global variation in breast cancer incidence. The study objectives were to characterize endogenous estrogen levels and bisphenol A (BPA) exposure using a migrant study of adolescent girls and test whether concentrations explained differences in thelarche by birthplace and growth environment. Estrogen metabolites (EM) and BPA-glucuronide (BPA-G) w…
Hot flash report and measurement among Bangladeshi migrants, their London neighbors, and their community of origin
OBJECTIVES: To examine hot flashes in relation to climate and activity patterns, and to compare subjective and objective hot flashes among Bangladeshi immigrants to London, their white London neighbors, and women still living in their community of origin, Sylhet, Bangladesh ("sedentees"). METHODS: Ninety-five women, aged 40-55, wore the Biolog ambulatory hot flash monitor. Objective measurements and subjective hot flash reports were examined in r…
Life course effects on age at menopause among Bangladeshi sedentees and migrants to the UK
OBJECTIVES: To assess how different variables experienced across the life course, but particularly during early life, might affect age at menopause among 174 Bangladeshi migrants to London by comparing them to 157 nonmigrant sedentees and 154 women of European descent in London. METHODS: Participants were aged 35-59 years, with no exogenous hormone use in the past three months, not pregnant or lactating, with no history of hysterectomy or oophore…
The impact of developmental conditions on adult salivary estradiol levels: Why this differs from progesterone
Women living in energetically stressful conditions have significantly lower baseline salivary steroid levels compared to those in affluent environments. Developmental hypotheses suggest that interpopulation variation in ovarian function results from contrasting environments experienced during growth. We use a migrant study of Bangladeshi women to test this hypothesis. We compared middle‐class women (19–39 years) who migrated to London, UK, at dif…
Patterns of occurrence and concordance between subjective and objective hot flashes among Muslim and Hindu women in Sylhet, Bangladesh
This study examined the pattern of occurrence and the rate of concordance between objective hot flashes measured by sternal skin conductance and the subjective experience of “gorom vap laga” (feeling steaming hot) among Muslim and Hindu women living in Sylhet, Bangladesh. Participants were aged 40–55, not pregnant or lactating, not using hormone therapy, and with no history of hysterectomy. Thirty women wore an ambulatory hot flash monitor for 8 …
Betel Nut Use among First and Second Generation Bangladeshi Women in London, UK
Hydration as a limiting factor in lactation
A relatively untapped area of research concerning lactation and hydration exists for bioanthropologists interested in the ecology of breastfeeding. This review details current limited knowledge on the topic with recommendations about relevant research questions for human biologists. On average, lactating mothers produce >750 ml/day milk for their infants. Breastfeeding thus promotes a powerful thirst stimulus in the lactating mother, resulting in…
Evidence for interpopulation variation in normal ovarian function and consequences for hormonal contraception
Introduction There is significant variation in the endogenous steroid hormone profiles of non-contracepting, menstruating women in different populations. Women in non-industrial societies frequently exhibit lower levels of progesterone and estrogen compared to Western subjects. This may be mediated primarily by inter-group differences in dietary composition, although we cannot rule out the possible effects of other factors such as women's current…
The Fertility of Agricultural and Multiagricultural Traditional Societies
Seasonal effects on salivary testosterone levels among lese males of the Ituri Forest, Zaire
Salivary testosterone levels were measured in 33 Lese horticulturalist men in June and August 1989 in order to examine the effects of improved nutritional status on testicular function. The Lese experience an annual hunger season from March through June that varies in impact from year to year, and was particularly severe in 1989. Even before annual weight losses, the Lese are at the low end of the desirable range and are below the desirable popul…
Hot flash report and measurement among Bangladeshi migrants, their London neighbors, and their community of origin
OBJECTIVES: To examine hot flashes in relation to climate and activity patterns, and to compare subjective and objective hot flashes among Bangladeshi immigrants to London, their white London neighbors, and women still living in their community of origin, Sylhet, Bangladesh ("sedentees"). METHODS: Ninety-five women, aged 40-55, wore the Biolog ambulatory hot flash monitor. Objective measurements and subjective hot flash reports were examined in r…
Seasonal effects on salivary testosterone levels among lese males of the Ituri Forest, Zaire
Salivary testosterone levels were measured in 33 Lese horticulturalist men in June and August 1989 in order to examine the effects of improved nutritional status on testicular function. The Lese experience an annual hunger season from March through June that varies in impact from year to year, and was particularly severe in 1989. Even before annual weight losses, the Lese are at the low end of the desirable range and are below the desirable popul…
The Fertility of Agricultural and Multiagricultural Traditional Societies
Evidence for interpopulation variation in normal ovarian function and consequences for hormonal contraception
Introduction There is significant variation in the endogenous steroid hormone profiles of non-contracepting, menstruating women in different populations. Women in non-industrial societies frequently exhibit lower levels of progesterone and estrogen compared to Western subjects. This may be mediated primarily by inter-group differences in dietary composition, although we cannot rule out the possible effects of other factors such as women's current…
Hydration as a limiting factor in lactation
A relatively untapped area of research concerning lactation and hydration exists for bioanthropologists interested in the ecology of breastfeeding. This review details current limited knowledge on the topic with recommendations about relevant research questions for human biologists. On average, lactating mothers produce >750 ml/day milk for their infants. Breastfeeding thus promotes a powerful thirst stimulus in the lactating mother, resulting in…
Betel Nut Use among First and Second Generation Bangladeshi Women in London, UK
The impact of developmental conditions on adult salivary estradiol levels: Why this differs from progesterone
Women living in energetically stressful conditions have significantly lower baseline salivary steroid levels compared to those in affluent environments. Developmental hypotheses suggest that interpopulation variation in ovarian function results from contrasting environments experienced during growth. We use a migrant study of Bangladeshi women to test this hypothesis. We compared middle‐class women (19–39 years) who migrated to London, UK, at dif…
Patterns of occurrence and concordance between subjective and objective hot flashes among Muslim and Hindu women in Sylhet, Bangladesh
This study examined the pattern of occurrence and the rate of concordance between objective hot flashes measured by sternal skin conductance and the subjective experience of “gorom vap laga” (feeling steaming hot) among Muslim and Hindu women living in Sylhet, Bangladesh. Participants were aged 40–55, not pregnant or lactating, not using hormone therapy, and with no history of hysterectomy. Thirty women wore an ambulatory hot flash monitor for 8 …
Life course effects on age at menopause among Bangladeshi sedentees and migrants to the UK
OBJECTIVES: To assess how different variables experienced across the life course, but particularly during early life, might affect age at menopause among 174 Bangladeshi migrants to London by comparing them to 157 nonmigrant sedentees and 154 women of European descent in London. METHODS: Participants were aged 35-59 years, with no exogenous hormone use in the past three months, not pregnant or lactating, with no history of hysterectomy or oophore…
Hot flash report and measurement among Bangladeshi migrants, their London neighbors, and their community of origin
OBJECTIVES: To examine hot flashes in relation to climate and activity patterns, and to compare subjective and objective hot flashes among Bangladeshi immigrants to London, their white London neighbors, and women still living in their community of origin, Sylhet, Bangladesh ("sedentees"). METHODS: Ninety-five women, aged 40-55, wore the Biolog ambulatory hot flash monitor. Objective measurements and subjective hot flash reports were examined in r…
Don't blame the Bame: Ethnic and structural inequalities in susceptibilities to Covid ‐19
One of the striking features emerging from the COVID-19 pandemic has been the early recognition of ethnic disparities in both vulnerability to contracting the disease, as well as its outcome. These disparities were first reported in news outlets (Blow, 2020; Cowan, 2020; Godin, 2020; The Guardian, 2020a) and, more recently, verified in academic journals (e.g., Bhala, Curry, Martineau, Agyeman, & Bhopal, 2020; Khunti, Singh, Pareek, & Hanif, 2020;…
Assessing Endogenous and Exogenous Hormone Exposures and Breast Development in a Migrant Study of Bangladeshi and British Girls
Timing of breast development (or thelarche) and its endogenous and exogenous determinants may underlie global variation in breast cancer incidence. The study objectives were to characterize endogenous estrogen levels and bisphenol A (BPA) exposure using a migrant study of adolescent girls and test whether concentrations explained differences in thelarche by birthplace and growth environment. Estrogen metabolites (EM) and BPA-glucuronide (BPA-G) w…
The timing of adrenarche in Maya girls, Merida, Mexico
BACKGROUND: Adrenarche involves maturation of the hypothalamic-pituitary-adrenal axis and increased production of dehydroepiandrosterone and its sulfate ester, dehydroepiandrosterone-sulfate (DHEA-S). It occurs at ages 6 to 8 in industrialized populations, marking the transition from childhood to juvenility and cognitive development at middle childhood. Studies in subsistence level populations indicate a later age (8-9) for adrenarche, but only t…
No impact of developmental conditions on serum estradiol levels among Bangladeshi women in the UK and Bangladesh
INTRODUCTION: While many aspects of female ovarian function respond to environmental stressors, estradiol (E2) appears less sensitive to stressors than progesterone, except under extreme ecological conditions. However, earlier studies relied on saliva samples, considered less sensitive than blood. Here, we investigated E2 variation among 177 Bangladeshi and UK white women, aged 35-59, using single serum samples. Bangladeshi women either grew up i…
Religious minority identity associates with stress and psychological health among Muslim and Hindu women in Bangladesh and London
OBJECTIVES: This study examined the association of minority religious identification (Hindu or Muslim) with self-reported stress and psychological symptoms among sedentee and immigrant Bangladeshi women. METHODS: Women, aged 35-59 (n = 531) were drawn from Sylhet, Bangladesh and London, England. Muslim immigrants in London and Hindu sedentees in Sylhet represented minority religious identities. Muslim sedentees in Sylhet and Londoners of European…
Demography (11 works) · Medicine (11 works) · Geography (7 works) · Internal Medicine (6 works) · Population (6 works) · Sociology (5 works) · Anthropometry (4 works) · Biology (4 works) · Endocrinology (4 works) · Environmental health (4 works)