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Poverty, early care and stress reactivity in adolescence: Findings from a prospective, longitudinal study in a low-middle income country

Fearon, RMP; Tomlinson, M; Kumsta, R; Skeen, S; Murray, L; Cooper, PJ; Morgan, B; (2017) Poverty, early care and stress reactivity in adolescence: Findings from a prospective, longitudinal study in a low-middle income country. Development and Psychopathology , 29 (2) pp. 449-464. 10.1017/S0954579417000104. Green open access

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Abstract

A considerable body of evidence suggests that early caregiving may affect the short-term functioning and longer-term development of the hypothalamic-pituitary adrenocortical (HPA) axis. Despite this, most research to date has been cross-sectional in nature or restricted to relatively short–term longitudinal follow-ups. More importantly, there is a paucity of research on the role of caregiving in low and middle income countries, where the protective effects of high quality care in buffering the child’s developing stress regulation systems may be crucial. In this paper, we report findings from a longitudinal study (N = 232) conducted in an impoverished peri-urban settlement in Cape Town, South Africa. We measured caregiving sensitivity and security of attachment in infancy and followed children up at age 13 years, when we conducted assessments of HPA axis reactivity, as indexed by salivary cortisol during the Trier Social Stress Test. The findings indicated that insecure attachment was predictive of reduced cortisol responses to social stress, particularly in boys, and that attachment status moderated the impact of contextual adversity on stress responses: secure children in highly adverse circumstances did not show the blunted cortisol response shown by their insecure counterparts. Some evidence was found that sensitivity of care in infancy was also associated with cortisol reactivity, but in this case insensitivity was associated with heightened cortisol reactivity, and only for girls. The discussion focuses on the potentially important role of caregiving in the long-term calibration of the stress system and the need to better understand the social and biological mechanisms shaping the stress response across development in low and middle income countries.

Type: Article
Title: Poverty, early care and stress reactivity in adolescence: Findings from a prospective, longitudinal study in a low-middle income country
Open access status: An open access version is available from UCL Discovery
DOI: 10.1017/S0954579417000104
Publisher version: http://doi.org/10.1017/S0954579417000104
Language: English
Additional information: © Cambridge University Press 2017. This version is the author accepted manuscript/version of record [delete as appropriate]. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Clinical, Edu and Hlth Psychology
URI: http://discovery.ucl.ac.uk/id/eprint/1522659
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