Abstract
Sibling relationships can be a source of both support and conflict. Due to more severe sibling competition, childhood injuries are predicted to increase as genetic relatedness decreases. Here we use the British Millennium Cohort Study (n = 7,143 children) to analyze the risk of accidents for small children in different types of households. Results show that, after controlling for several potential confounding factors, 3-year-old children who lived in same household with their full siblings had a significantly lower risk of injuries (predicted probability 25.3%) than did children who lived with both their full and half siblings (29.6%) or only with their half siblings (29.1%). We conclude that efforts to prevent child maltreatment should pay attention to sibling relations and family composition.
References
(2006). Fratricide: A forensic psychiatric perspective. Journal of the American Academy of Psychiatry and Law, 34, 529–533.
(2004). Children at Risk of Injury. Journal of Pediatric Nursing, 19, 121–127.
(2013). Sibling relationship quality and psychopathology of children and adolescents: A meta-analysis. Clinical Psychology Review, 33, 97–106.
(1972). Measuring infant temperament. Journal of Pediatrics, 81, 414.
(1978). Revision of Infant Temperament Questionnaire. Pediatrics, 61, 735–739.
(1988). Homicide. New York, NY: Aldine de Gruyter.
(2002). Sibling relationships and social-emotional adjustment in different family contexts. Social Development, 11, 571–590.
(1964). The genetical evolution of social behaviour I and II. Journal of Theoretical Biology, 7, 1–52.
(2010). Millennium Cohort Study first, second, third and fourth surveys: A guide to the datasets (5th ed.). London, UK: Centre for Longitudinal Studies.
(2003). Household and neighbourhood risks for injury to 5–14 year old children. Social Science & Medicine, 57, 625–636.
(2009). Parental socioeconomic status and unintentional injury deaths in early childhood: Consideration of injury mechanisms, age at death, and gender. Accident Analysis and Prevention, 42, 313–319.
(2008). Sibling competition and cooperation in mammals: Challenges, developments and prospects. Behavioral Ecology and Sociobiology, 62, 299–307.
(2001). How useful are sociodemographic characteristics in identifying children at risk of unintentional injury? Public Health, 115, 103–107.
(2005). Relationships between child, family and neighborhood characteristics and childhood injury: A cohort study. Social Science and Medicine, 61, 1905–1915.
(1996). How safe are day care centers? Day care versus home injuries among children in Norway. Pediatrics, 97, 43–47.
(2005). Cooperation and conflict among kin. In David. M. BussEd., The handbook of evolutionary psychology (pp. 447–482). Hoboken, NJ: Wiley.
(2009). Trade-offs in modern parenting: A longitudinal study of sibling competition for parental care. Evolution and Human Behavior, 30, 170–183.
(2007). The architecture of human kin detection. Nature, 445, 727–731.
(2012). Sibling Relationships and Influences in Childhood and Adolescence. Journal of Marriage and Family, 74, 913–930.
(1997). The evolution of sibling rivalry. Oxford, UK: Oxford University Press.
(2012). Familial factors and child characteristics as predictors of injuries in toddlers: A prospective cohort study. BMJ Open, 2, e000740.
. (2006). CDC injury fact book. National Center for Injury Prevention and Control Disease Control and Prevention. Atlanta, GA: Center for Disease Control and Prevention.
(2013). Are elder siblings helpers or competitors? Antagonistic fitness effects of sibling interactions in humans. Proceedings of the Royal Society B: Biological Sciences, 280, 20122313.
. (2010). Does childcare influence socioeconomic inequalities in unintentional injury? Findings from the UK Millennium Cohort Study. Journal of Epidemiology & Community Health, 64, 161–166.
(2012). Does the home environment influence inequalities in unintentional injury in early childhood? Findings from the UK Millennium Cohort Study. Journal of Epidemiology and Community Health, 66, 181–188.
(2007). Genetic relatedness and sibling relationship characteristics in a modern society. Evolution and Human Behavior, 28, 176–185.
(2011). An evolutionary perspective on siblings: Rivals and resources. In C. SalmonT. K. ShackelfordEds., The Oxford handbook on evolutionary family psychology (pp. 128–148). New York, NY: Oxford University Press.
(2008). Unintentional home injury in preschool-aged children: Looking for the key – an exploration of the inter-relationship and relative importance of potential risk factors. Public Health, 117, 404–411.
(2008). Individual factors explain neighbourhood variations in accidents to children under 5 years of age. Social Science & Medicine, 67, 915–927.
(1999). Accidents to preschool children: Comparing family and neighbourhood risk factors. Social Science & Medicine, 48, 321–330.
(1989). Risk of injury to children less than 5 years of age in day care versus home care settings. Pediatrics, 84, 1011–1016.
(2014). Gratitude among help for friends and siblings. Evolutionary Psychology, 12, 673–686.
(2014). The evolutionary psychology of sibling conflict and siblicide. In T. K. ShackelfordR. D. HansenEds., The evolution of violence (pp. 137–157). New York, NY: Springer.
(2006). Does time spent in child care influence risk for unintentional injury. Journal of Pediatric Psychology, 31, 184–193.
(2004). The social context of childhood injury in Canada: Integration of the NLSCY findings. American Journal of Health Behavior, 28, S38–S50.
(2013). Growing up in a blended family or a stepfamily: What is the impact on education?. Stockholm, Sweden: Swedish Institute for Social Research Working paper No. 2.
(2014). Genetic relatedness predicts contact frequencies with siblings, nieces and nephews: Results from the generational transmissions in Finland surveys. Personality and Individual Differences, 69, 5–11.
(1974). Parent-offspring conflict. American Zoologist, 14, 249–264.
. (2001). Innocenti Report Card, no. 2. Florence, Italy: UNICEF Innocenti Research Centre.
(2013). Altruism and reciprocity among friends and kin in a Tibetan village. Evolution and Human Behavior, 34, 323–329.
