Individual Resiliency Factors from a Genetic Perspective: Results from a Twin Study


  • This report is part of the Genes, Environment, and Maternal Adjustment (Twin Mothers) project, supported by the National Institutes of Mental Health (MH-54610) and the Medical Research Council, Sweden. We also thank the editor and the reviewers for all helpful comments and support.

concerning this article should be addressed to Kjell Hansson, or to the School for Social Work, Lund University, Box 23, S-22 100, Lund, Sweden. E-mail:


This article is part of the Twin Mother's Study, a study that examines influences on maternal adjustment. A number of studies have investigated the importance of genetic factors for mental health, but few of these examine how genes and the environment influence resiliency/salutogenic factors. This article investigates the relative importance of genetic and environmental influences on resiliency/salutogenic factors. This study includes 326 twin pairs (150 monozygotic and 176 dizygotic) who are mothers, who are living with their spouse, and who are part of the Swedish twin register. Using self-report structured questionnaires, we assessed salutogenic factors, depression, and quality of life; however, we analyzed the questionnaires completed by the mothers. Statistical analyses were conducted using structural equation modeling. We conclude that nonshared environmental components were of principal importance in individual resiliency/salutogenic factors in a genetically informative design, but we also noted that genetic influences were important. The shared environment had mainly no effect.


Este artículo es parte del Estudio de Madres Gemelas (Twin Mother's Study), un estudio que examina los factores influyentes en el ajuste materno (Reiss et al. 2001). Varios estudios han investigado la importancia de los factores genéticos para la salud mental, pero pocos de éstos examinan en qué modo los genes y el entorno influyen en los factores de resiliencia/salutogénicos. Este artículo investiga la importancia relativa de los factores influyentes genéticos y ambientales en los factores de resiliencia/salutogenéticos. Este estudio cuenta con 326 pares de gemelas (150 monocigóticos y 176 dicigóticos) que son madres, que viven con sus parejas, y que forman parte del registro sueco de gemelos. Utilizando cuestionarios con estructura de autoinforme evaluamos factores salutogénicos, depresión y calidad de vida; sin embargo, analizamos los cuestionarios completados por las madres. Se hicieron análisis estadísticos utilizando modelos de ecuación estructural. Concluimos que los factores ambientales no compartidos fueron de principal importancia en los factores individuales de resiliencia/salutogénicos en un diseño genéticamente informativo, pero tambien notamos que los factores influyentes genéticos fueron importantes. El entorno compartido apenas tuvo efecto.
Palabras clave: factores salutogénicos, resiliencia, estudio de gemelos, sentido de coherencia