Intergenerational Association Research Articles

The association between maternal and offspring preterm birth. Results from a sibling design

IntroductionPrevious studies have reported an intergenerational association between maternal and offspring preterm birth (PTB) but the nature of the association remains unclear.
 Objectives and ApproachThe objective was to revisit the association between maternal and offspring preterm birth using a quasi-experimental sibling design and distinguishing between preterm birth types. We conducted a retrospective intergenerational cohort study of 39,573 women born singleton in Manitoba, Canada (1980-2002) who gave birth to 79,198 singleton infants (1995-2016). To account for familial confounding we defined a matched subcohort of 1033 sister mothers with discordant PTB status and compared offspring PTB rates between 2,499 differentially exposed cousins using log-binomial fixed-effects generalized estimating equation models. PTB was defined as a delivery < 37 gestation weeks, divided into spontaneous and provider-initiated.
 ResultsIn the population, mothers born preterm were more likely to give birth preterm [Adjusted Relative Risk (ARR): 1.39; 95\% Confidence Interval (CI): 1.25, 1.54]. The intergenerational association was not apparent among births to sisters with discordant PTB status [ARR: 1.02; 95\% CI: 0.77, 1.34]. However, the lack of association in the sibling analyses is explained by the fact that infants whose maternal aunts, but not their mothers, were born preterm had similarly elevated risk of PTB (10\%) than infants whose mothers were born preterm. Intergenerational patterns were observed for spontaneous PTB but not for provider-initiated PTB.
 Conclusion/ImplicationsThese findings suggest that it is not the fact of having been born preterm that puts women at higher risk of delivering preterm, but the fact of having been born to a mother who ever delivered a preterm baby. Consideration of family history of PTB may better identify women-at-risk.

Intergenerational teen pregnancy: a population-based cohort study.

To estimate the intergenerational association in teenage pregnancy, and whether there is a coupling tendency between a mother and daughter in how their teen pregnancies end, such as a termination of pregnancy (TOP) versus a live birth. Population-based cohort study. Ontario, Canada. A total of 15 097 mothers and their 16 177 daughters. Generalised estimating equations generated adjusted odds ratios (aOR) of a daughter experiencing a teen pregnancy in relation to the number of teen pregnancies her mother had. Multinomial logistic regression estimated the odds that a teen pregnancy ended with TOP among both mother and daughter. All models were adjusted for maternal age and world region of origin, the daughter's socio-demographic characteristics and comorbidities, mother-daughter cohabitation, and neighbourhood-level teen pregnancy rate. Teen pregnancy in the daughter, between ages 15 and 19 years, and also the nature of the daughter's teen pregnancy, categorised as (1) no teen pregnancy, (2) at least one teen pregnancy, all exclusively ending with a live birth, and (3) at least one teen pregnancy, with at least one teen pregnancy ending with a TOP. The proportion of daughters having a teen pregnancy among those whose mother had zero, one, two, or at least three teen pregnancies was 16.3, 24.9, 33.5 and 36.3%, respectively. The aOR of a daughter having a teen pregnancy was 1.42 (95% CI 1.25-1.61) if her mother had one, 1.97 (95% CI 1.71-2.26) if she had two, and 2.17 (95% CI 1.84-2.56) if her mother had three or more teen pregnancies, relative to none. If a mother had at least one teen pregnancy ending with TOP, then her daughter had an aOR of 2.12 (95% CI 1.76-2.56) for having a teen pregnancy also ending with TOP; whereas, if a mother had at least one teen pregnancy, all ending with a live birth, then her daughter had an aOR of 1.73 (95% CI 1.46-2.05) for that same outcome. There is a strong intergenerational occurrence of teenage pregnancy between a mother and daughter, including a coupling tendency in how the pregnancy ends. Strong intergenerational association for teenage pregnancy between mother and daughter.

Antecedents and consequences of parental psychological control and autonomy support: The role of psychological basic needs

Research suggests that psychologically controlling and autonomy-supportive parenting can be described within the Self-Determination Theory’s (SDT) framework. Two studies were conducted to examine (a) the role of parental need frustration as a predictor of parental psychological control, (b) the role of parental need satisfaction as a predictor of parental autonomy support, and (c) the role of parents’ psychological control and autonomy support in the intergenerational transmission of satisfaction and frustration of the psychological basic needs. Study 1 provided evidence, in a sample of 203 Italian coupled parents, that needs frustration and needs satisfaction represent distinct antecedents of psychological control and autonomy support. Study 2, showed that in 135 families, the intergenerational association between parents’ and adolescents’ need frustration was partially mediated by psychological control and autonomy support. Results clearly showed that parents who experienced high level of psychological needs frustration are more likely to use psychological control and in turn to promote a feeling of need frustration in their adolescents; differently, parents who experienced high levels of psychological needs satisfaction tend to exert more autonomy support in their relationship with their children and in turn adolescents tend to perceive higher level of needs satisfaction. These findings are discussed in light of SDT and underline the importance of needs in the parenting context and have implications for interventions.

Parental perception of child weight and inflammation: Perceived overweight is associated with higher child c-reactive protein

Self-perceived overweight and weight discrimination are associated with inflammation in adulthood. We test whether there is an intergenerational association of parent perception of child overweight on higher levels of child c-reactive protein (CRP), a marker of inflammation implicated in stress. Data were from the National Health and Nutrition Examination Survey 2005–2014 (N=4988). Parents reported their perception of their child’s weight; CRP was assayed from children’s blood samples. Children whose parents perceived them as overweight had higher CRP levels than children who were perceived about the right weight; perceived underweight was also associated with higher CRP (F(2,4977)=9.23, p<.001). These associations were independent of the child’s objective weight status and waist circumference and held when the sample was limited to children with objective overweight and obesity. These results suggest an intergenerational transfer of the psychological perception of body weight from parents to the inflammatory health of their child.

Shared genetic influences do not explain the association between parent-offspring relationship quality and offspring internalizing problems: results from a Children-of-Twins study.

Associations between parenting and child outcomes are often interpreted as reflecting causal, social influences. However, such associations may be confounded by genes common to children and their biological parents. To the extent that these shared genes influence behaviours in both generations, a passive genetic mechanism may explain links between them. Here we aim to quantify the relative importance of passive genetic v. social mechanisms in the intergenerational association between parent-offspring relationship quality and offspring internalizing problems in adolescence. We used a Children-of-Twins (CoT) design with data from the parent-based Twin and Offspring Study of Sweden (TOSS) sample [909 adult twin pairs and their offspring; offspring mean age 15.75 (2.42) years], and the child-based Swedish Twin Study of CHild and Adolescent Development (TCHAD) sample [1120 adolescent twin pairs; mean age 13.67 (0.47) years]. A composite of parent-report measures (closeness, conflict, disagreements, expressions of affection) indexed parent-offspring relationship quality in TOSS, and offspring self-reported internalizing symptoms were assessed using the Child Behavior Checklist (CBCL) in both samples. A social transmission mechanism explained the intergenerational association [r = 0.21 (0.16-0.25)] in our best-fitting model. A passive genetic transmission pathway was not found to be significant, indicating that parental genetic influences on parent-offspring relationship quality and offspring genetic influences on their internalizing problems were non-overlapping. These results indicate that this intergenerational association is a product of social interactions between children and parents, within which bidirectional effects are highly plausible. Results from genetically informative studies of parenting-related effects should be used to help refine early parenting interventions aimed at reducing risk for psychopathology.

Intergenerational Associations in Sexual Onset: Mediating Influences of Parental and Peer Sexual Teasing and Youth Substance Use

PurposeThe prospective intergenerational association between fathers' age of onset of sexual intercourse and their son's or daughter's age of onset of oral sex or intercourse up to 30 years later was examined using survival analyses across child ages 11–12 years to 17–18 years. In addition, novel constructs of parental and peer sexual teasing (at ages 11–12 years) and general risk factors of child substance use onset (alcohol and marijuana) before or concurrent with sexual onset were assessed as predictors of children's sexual onset and mediators of intergenerational associations. MethodsHypotheses were tested using the Oregon Youth Study Intergenerational sample, including 100 fathers and 176 children (46% girls). ResultsUnivariate findings indicated that children were at risk for earlier sexual onset, provided their fathers had onset of sex at younger ages; in addition, child alcohol and marijuana onset and parental, but not peer, sexual teasing predicted earlier age of sexual onset for children. Multivariate findings indicated that child alcohol onset fully mediated the intergenerational association in age of sexual onset, whereas parental teasing and child marijuana onset did not explain the intergenerational association. ConclusionsFindings of intergenerational associations in risk of sexual onset indicate that mechanisms of this association should be further examined. Substance use onset also confers risk for earlier child sexual onset, with alcohol use onset accounting for intergenerational associations; thus, substance use onset should be a prime target for prevention. Parental sexual teasing warrants further study as a mechanism related to possibly unintended encouragement of youth's early sexual onset.

Planning a Career in Engineering: Parental Effects on Sons and Daughters

This paper examines the extent to which prospective engineers follow in their parents’ footsteps. Specifically, we investigate the connection between fathers’ and mothers’ employment in the engineering profession and the career plans of sons and daughters. We develop a number of reasons to expect an occupation-specific intergenerational association in this field, as well as hypotheses regarding gender-specific role-modeling. Data are drawn from the UCLA HERI Freshman Survey data spanning 1971 to 2011. The results point to clear and substantial effects on sons and daughters’ plans to pursue engineering, connections that cannot be explained by typical pathways such as social background, education and values. The evidence points to a pattern of increasing salience of mothers with respect to the career plans of their children, especially their daughters. The implications of these findings for the under-representation of women in engineering and for gender-specific family dynamics are discussed in the conclusion.

Intergenerational income persistence and transmission mechanism: Evidence from urban China

In this paper I investigate the intergenerational income association and its transmission channels amid China's economic transition period using urban data from the Chinese Household Income Projects in 1995 and 2002. The estimated intergenerational income elasticity is 0.43 and 0.51 for cohorts educated prior to and after the market reform respectively, and reaches 0.71 among households with above average income in the post-reform era. Besides the conventional channel of education, this paper estimates the contribution from social capital and ownership of work unit across cohorts and income groups. There is weak evidence that prior to market reform, ownership of work unit contributes most to the intergenerational income persistence for households with below average income, while social capital leads the three contributors in households with above average income. However, in the post-reform era, parents with below average income invest statistically significantly in children's education which contributes most to the intergenerational income persistence. The leading contributor in families with above average income shifts to social capital. Possible explanations for such a shift lie in the ability and incentive of parents from different income categories to invest in their children. The results are tested through a series of robustness checks, and provide empirical support for promoting policies on the equality of opportunity.

Intergenerational association of environmental concern: Evidence of parents' and children's concern

To understand how young people develop environmental concern, this article investigates the relationship between parents' environmental concern and those of their children. Using 2006 survey data from the Programme for International Student Assessment (PISA), featuring nationally representative samples from 16 countries, this study provides evidence that parents' environmental concern has an important influence on children's environmental concern. The influence of parents in this realm reflects the parent equivalent socialization hypothesis and applies for both boys and girls. However, girls are more sensitive to the intergenerational association of their mothers and fathers. Informative campaigns about the environment in schools also contribute to increase children's environmental concern. These results offer interesting implications for both research and practice.

Residential Segregation from Generation to Generation: Intergenerational Association in Socio‐Spatial Context Among Visible Minorities and the Majority Population in Metropolitan Sweden

AbstractIn this paper, we investigate to what degree young adults live in neighbourhoods that are similar, in terms of relative average household income, to the neighbourhoods in which they grew up. We use regression analysis on register data for all individuals who were born in 1974 and lived in metropolitan Sweden in both 1990 and 2006. During this period, the distribution of income in Sweden became far more unequal, unemployment rose dramatically, earlier housing policies were dismantled, the share of ‘visible minorities’ increased dramatically, and residential segregation increased very considerably. We find a correlation between average neighbourhood incomes at these two points in the sample's life cycle of 0.44, which is more than three times as high as the household income correlation. We also find that half of the children of ‘visible minorities’ grew up in the poorer quartile of neighbourhoods, and of these, almost two‐thirds remained in the poorest quartile of neighbourhoods as adults. Several measures indicate that intergenerational persistency in context is lower in metropolitan Sweden than was found in a similar study in the US. However, it appears that if visible minority individuals lived in a neighbourhood in the lowest part of the distribution in Sweden as a child, the probability that they will do so also as adults is as high as the corresponding probability for an African‐American person in the US. Copyright © 2016 John Wiley &amp; Sons, Ltd.

Persistent Educational Advantage Across Three Generations: Empirical Evidence for Germany

This article uses survey data from the German Socio-Economic Panel (GSOEP) to analyze the persistence of educational attainment across three generations in Germany. I obtain evidence of a robust effect of grandparents' education on respondents' own educational attainment in West Germany, net of parental class, education, occupational status, family income, parents' relationship history, and family size. I also test whether the grandparent effect results from resource compensation or cumulative advantage and find empirical support for both mechanisms. In comparison, the intergenerational association between grandparents' and respondents' education is considerably weaker in East Germany and is also mediated completely by parental education. There are hardly any gender differences in the role of grandparents for respondents’ educational attainment, except for the fact that resource compensation is found to be exclusively relevant for women’s attainment in both West Germany and in East Germany after German reunification and the associated transition to an open educational system.

Residential Segregation from Generation to Generation: Intergenerational Association in Socio-Spatial Context Among Visible Minorities and the Majority Population in Metropolitan Sweden

In this paper, we investigate to what degree young adults live in neighbourhoods that are similar, in terms of relative average household income, to the neighbourhoods in which they grew up. We use regression analysis on register data for all individuals who were born in 1974 and lived in metropolitan Sweden in both 1990 and 2006. During this period, the distribution of income in Sweden became far more unequal, unemployment rose dramatically, earlier housing policies were dismantled, the share of minorities increased dramatically and residential segregation increased very considerably. We find a correlation between average neighbourhood incomes at these two points in the sample's life cycle of 0.44, which is more than three times as high as the household income correlation. We find that half of the children of minorities grew up in the poorer quartile of neighbourhoods, and of these almost two-thirds remained in the poorest quartile of neighbourhoods as adults. Several measures indicate that intergenerational persistency in context is lower in metropolitan Sweden than was found in a similar study in the United States. However, it appears, that if visible minority individuals lived in a neighbourhood in the lowest part of the distribution in Sweden as a child, the probability that they will do so also as adults is as high as the corresponding probability for a African-American person in the US.

Social Mobility in a High-Inequality Regime

Are opportunities to get ahead growing more unequal? Using data from the General Social Survey (GSS), it is possible to provide evidence on this question, evidence that is suggestive but must be carefully interpreted because the samples are relatively small. The GSS data reveal an increase in class reproduction among young and middle-age adults that is driven by the growing advantage of the professional-managerial class relative to all other classes. This trend is largely consistent with our new “top-income hypothesis” that posits that rising income inequality registers its effects on social mobility almost exclusively in the divide between the professional-managerial class and all other classes. We develop a two-factor model in which the foregoing effects of the inequality takeoff are set against the countervailing effects of the expansion of mass education. As the model implies, the trend in intergenerational association takes on a convex shape in the younger age groups, with the change appearing to accelerate in the most recent decade. These results suggest that the takeoff in income inequality may account in part for the decline in mobility.

Intergenerational Mobility and Equality of Opportunity

AbstractIntergenerational mobility—the association between parents’ and adult children’s economic wellbeing—is an important sociological concept because it provides information about inequality of opportunity in society, and it has gained relevance in the recent past due to the increase economic inequality in most of the affluent world. This article provides an overview of the different measures of mobility used by sociologists and economists, as well as main empirical findings about mobility. I then move to topics that push mobility analysis beyond its bivariate focus: The association between intergenerational mobility and economic inequality, the mechanisms for mobility, and the validity of mobility as a measure of inequality of opportunity. I suggest that the association between mobility and inequality is likely spurious, driven by varying institutional arrangements across countries, and that mobility analysis is most useful when focused on describing the bivariate intergenerational association across countries and over time.

The interpersonal antecedents of supportive parenting: a prospective, longitudinal study from infancy to adulthood.

This study drew on prospective, longitudinal data to test the hypothesis that the intergenerational transmission of positive parenting is mediated by competence in subsequent relationships with peers and romantic partners. Interview-based ratings of supportive parenting were completed with a sample of 113 individuals (46% male) followed from birth to age 32. Results indicated that supportive parenting during adulthood was predicted by observed maternal sensitivity during the first 3 years of life, even after controlling for adults' age at first childbirth and adults' socioeconomic status and educational attainment at the time of the second generation parenting assessments. Moreover, the intergenerational association in parenting was mediated by later competence in relationships with peers and romantic partners. In particular, sensitive caregiving in infancy and early childhood predicted teachers' rankings of children's social competence with peers during childhood and adolescence, which in turn forecasted later interview ratings of romantic relationship competence during young adulthood, which in turn predicted supportive parenting in adulthood. Findings are discussed with respect to current theory and research on the intergenerational transmission of parenting.

Why Do Entrepreneurial Parents Have Entrepreneurial Children?

We explore the origins of the intergenerational association in entrepreneurship using Swedish adoption data that allow us to quantify the relative importance of prebirth and postbirth factors. We find that parental entrepreneurship increases the probability of children’s entrepreneurship by about 60%. For adoptees, both biological and adoptive parents make significant contributions to this association. These contributions, however, are quite different in size. Postbirth factors account for twice as much as prebirth factors in our decomposition of the intergenerational association in entrepreneurship. We investigate several candidate explanations for this large postbirth factor and present suggestive evidence in favor of role modeling.

Is the Effect of Parental Education on Offspring Biased or Moderated by Genotype?

Parental education is the strongest measured predictor of offspring education, and thus many scholars see the parent–child correlation in educational attainment as an important measure of social mobility. But if social changes or policy interventions are going to have dynastic effects, we need to know what accounts for this intergenerational association, that is, whether it is primarily environmental or genetic in origin. Thus, to understand whether the estimated social influence of parental education on offspring education is biased owing to genetic inheritance (or moderated by it), we exploit the findings from a recent large genome-wide association study of educational attainment to construct a genetic score designed to predict educational attainment. Using data from two independent samples, we find that our genetic score significantly predicts years of schooling in both between-family and within-family analyses. We report three findings that should be of interest to scholars in the stratification and education fields. First, raw parent–child correlations in education may reflect one-sixth genetic transmission and five-sixths social inheritance. Second, conditional on a child’s genetic score, a parental genetic score has no statistically significant relationship to the child’s educational attainment. Third, the effects of offspring genotype do not seem to be moderated by measured sociodemographic variables at the parental level (but parent–child genetic interaction effects are significant). These results are consistent with the existence of two separate systems of ascription: genetic inheritance (a random lottery within families) and social inheritance (across-family ascription). We caution, however, that at the presently attainable levels of explanatory power, these results are preliminary and may change when better-powered genetic risk scores are developed.

Analyses of Intergenerational Mobility

This article reviews the sociological and economic literature on intergenerational mobility. Findings on social class, occupational status, earnings, and income mobility are discussed and discrepancies among them are evaluated. The review also examines nonlinearities in the intergenerational association, variation in mobility across advanced industrial countries, and recent mobility trends in the United States. The literature suggests an association between inequality and economic mobility at the country level, with the United States featuring higher inequality and lower mobility than other advanced industrial countries. However, mobility has not declined in the United States over the recent decades in which inequality has expanded. The inequality-mobility relationship fails to emerge when occupational measures of mobility are used, likely because these measures do not fully capture some mechanisms of economic reproduction.

Water and nutrient intake in pregnant New Zealand women: association with wheeze in their infants at 18 months.

The association between water and nutrient intake in pregnant women, and wheeze in their 18 month old infants, was investigated in a prospective study. Volunteers (n=369) recruited from northern New Zealand were visited in months 4 and 7 of pregnancy. At each visit anthropometric measurements were taken, diet assessed by 24-hour recall and 3-day food records and questionnaires determining personal details administered. Eighteen months after birth, infants were measured, and questions on infant feeding and wheeze asked. Overall, mothers reported 32% of their infants had wheezed in the last 12 months. After adjusting for significant covariates and energy intake, higher maternal intakes of dietary water (p=0.009) and manganese (p=0.024) were associated with decreased wheeze, and glucose (p=0.003) with increased wheeze. Prevalence of infant wheeze decreased 18.5% from the lower to the upper quartile of water intake, and 17.4% from the lower to the upper quartile of manganese intake. Wheeze was more common in Polynesian than European infants (41.8% vs 28.9%). Polynesian mothers consumed significantly less dietary water (median 451 g less) and manganese (median 1374 μg less) than European mothers per day. Glucose was only significant because of strong association with infant wheeze at extremely high maternal intakes of >40 g/day in ~10% of the subjects. There was no association between maternal dietary supplement intake and wheeze. Mothers estimated at high risk of infant wheeze consumed less tap water, whole grains, tea, fruit; and more fruit juice, soft drink, processed meat and fish products, and refined grain products. This is the first study to report an intergenerational association between maternal water, and glucose intake with infant wheeze.

Neck/upper back and low back pain in parents and their adult offspring: Family linkage data from the Norwegian HUNT Study.

Chronic pain in the neck and low back is highly prevalent. Although heritable components have been identified, knowledge about generational transmission of spinal pain between parents and their adult offspring is sparse. This study examined the intergenerational association of spinal pain using data from 11,081 parent-offspring trios participating in the population-based HUNT Study in Norway. Logistic regression was used to calculate adjusted odds ratios (ORs) with 95% confidence intervals (CIs) for offspring spinal pain associated with parental spinal pain. In total, 3654 (33%) offspring reported spinal pain at participation. Maternal and paternal spinal pain was consistently associated with higher ORs for offspring spinal pain. The results suggest a slightly stronger association for parental multilevel spinal pain (i.e., both neck/upper back pain and low back pain) than for pain localized to the neck/upper back or low back. Multilevel spinal pain in both parents was associated with ORs of 2.6 (95% CI, 2.1-3.3), 2.4 (95% CI, 1.9-3.1) and 3.1 (95% CI, 2.2-4.4) for offspring neck/upper back, low back and multilevel spinal pain, respectively. Parental chronic spinal pain was consistently associated with increased occurrence of chronic spinal pain in their adult offspring, and this association was particularly strong for multilevel spinal pain.