Social relationships and allostatic load across adulthood

Two cohorts helped researchers examine how caring relationships, social integration, and emotional support were associated with a combined measure of biological risk.

Knowing whether someone is married tells us one fact about their social life. It tells us much less about whether they feel cared for, receive emotional support, or encounter frequent criticism. A biological account of relationships may need those distinctions too.

Teresa Seeman and colleagues explored them in their 2002 paper on social relationships and allostatic load. They examined two groups of adults, asking whether aspects of social experience were associated with a measure combining activity across several physiological systems.

The findings generally linked more positive relationship experiences with lower measured biological burden. But the patterns varied by the social measure, the group, and the analysis. Those differences help explain what a phrase such as social connection can conceal when it is treated as a single quantity.

Two groups and two views of relationship experience

The younger cohort included 106 people aged 58 to 59 from the Wisconsin Longitudinal Study. Their relationship measures combined reported experiences of caring from parents during childhood with later experiences involving a spouse or significant other.

The older cohort included 765 adults aged 70 to 79 from the MacArthur Studies of Successful Aging. This group had been selected for relatively high physical and cognitive functioning. Their measures concerned current social integration, emotional and practical support, and criticism or demands from other people.

These were complementary views of social experience, rather than identical questionnaires applied at two ages. The younger group's measures reached back across life. The older group's measures gave more detail about their present social network. That difference limits how directly the results can be compared.

Both groups received similar biological assessments. The researchers formed an allostatic-load score from ten measures, including blood pressure, cholesterol, glucose-related and body-composition measures, and several hormones. The score summarized a pattern across systems rather than one stress hormone or a report of feeling stressed.

Each component added one point when its value fell within the higher-risk quarter of the older cohort's distribution. The same component cutoffs were used for the younger group. The researchers then defined a high total differently in the two cohorts, three or more points in the younger group and five or more in the older group. These were study-defined comparisons, not a diagnosis of how stressed a person felt or a universal boundary between healthy and unhealthy relationships.

Caring relationships across a life

Among the younger participants, a more favorable cumulative relationship pattern was associated with lower odds of a high allostatic-load score. This appeared among both men and women.

The cumulative measure matters to the interpretation. It brought early parental caring and adult intimate relationships into one account. The result was consistent with the possibility that the quality of close relationships across a life is relevant to biological functioning later on.

A positive pathway did not require every relationship to have been favorable. It required at least one favorable parental-caring score and at least one favorable combined measure of adult intimacy. The adult measures included emotional and sexual intimacy as well as intellectual and recreational companionship. This allowed a history with uneven experiences to differ from one marked by low scores across both parents or across both dimensions of the adult relationship.

However, allostatic load was measured at only one point. The study did not observe an individual's biological score falling as relationships improved, nor establish how childhood and adult experiences separately caused later differences. Recollections of early relationships and other unmeasured circumstances could also contribute to the pattern.

The useful question opened by the finding is therefore about relationship history. A person's current household status may leave out experiences of care that have accumulated across different periods of life.

Social integration in later adulthood

In the older cohort, men with greater social integration tended to have lower average allostatic-load scores. The corresponding pattern among women was in the same general direction but was not statistically significant for the average score.

A second analysis asked a different question, whether participants fell into the high-load group. Here, greater social integration was associated with lower odds of high allostatic load among both men and women, compared with having few or no social ties.

The largest differences in average scores appeared between people with zero to two ties and those in the higher categories. The pattern was not a uniform decline with every step toward a larger network, especially among women. The findings therefore give more reason to examine the circumstances of having few ties than to prescribe an ever-expanding circle of acquaintances.

Both results belong in the account. It would be inaccurate to conclude that social integration mattered only for men. An association with the average score and an association with being at the high end of the distribution are different tests, and they can reveal different aspects of a pattern.

The study also tested whether the associations differed reliably by gender. Those interaction tests did not find significant differences. A significant result in one group alongside a nonsignificant result in another is not, by itself, evidence that the groups truly differ.

Emotional support, practical help, and marital status

More frequent emotional support was associated with lower allostatic load among older men. The corresponding findings for older women were not statistically significant.

Emotional support had a concrete meaning in the survey. Participants reported how often others made them feel loved and cared for and were willing to listen when they needed to discuss worries or problems. Practical support asked about help with tasks such as shopping or transport and about advice on medical, financial or family matters. A relationship could provide one kind of support, both, or neither.

Practical assistance did not show the same association in either group. The distinction does not mean that practical help lacks value. Receiving it may reflect a need for assistance, and this study was not designed to test the effects of providing a particular service. It does show why emotional support and instrumental help should not automatically be treated as interchangeable measures.

Marital status was also not significantly related to allostatic load in the older cohort. Simply being married supplied less information about this biological outcome than some of the measures of social integration and relationship experience.

Taken together, these findings direct attention toward what a relationship provides and how a person is situated among others. A structural label can be relevant without describing the quality or availability of care within it.

The source of criticism mattered to the analysis

The overall measure of criticism and demands from other people was not associated with allostatic load. More detailed analyses of particular relationships suggested some differences.

Spousal criticism and demands were associated with higher average load among women, while the corresponding association among men was weaker. In the analysis of high-load classification, frequent spousal criticism was significantly associated with higher odds among men. Findings involving criticism from children pointed toward higher load but were marginal rather than conclusive.

These patterns are suggestive and varied across analyses. They should not be flattened into a claim that every negative interaction raises biological risk by a predictable amount. They do suggest that where an interaction comes from may be relevant. An exchange with someone central to daily life can have a different place in a person's experience from a broad average across all social contacts.

The paper's more detailed results also show why the quality of a network deserves attention alongside its size. More ties can coexist with more care, more demands, or a mixture of both.

A biological snapshot within a larger life

The two cohorts showed multiple routes to a higher allostatic-load score. People could reach similar totals through different combinations of cardiovascular, metabolic, and hormonal measures. The older cohort generally had higher scores, but comparing two separate groups does not show the rate at which an individual's score changes with age.

Both cohorts were predominantly White, and the older cohort's high-functioning selection limited its representativeness. The reported analyses also did not establish that the social associations were independent of differences in income, health or health-related behavior. Most importantly, the single biological assessment could not determine whether social experiences changed load over time or whether existing health differences also shaped social participation and support.

For the study of connection, the paper offers a more precise set of things to notice. A history of caring, a place among several social ties, the availability of emotional support, and the tone of close family interactions are distinguishable experiences. Each can be investigated in relation to biology without assuming that a single label, such as married or socially active, tells the whole story.

Sources

Seeman, T. E., Singer, B. H., Ryff, C. D., Dienberg Love, G., & Levy-Storms, L. (2002). Social relationships, gender, and allostatic load across two age cohorts. Psychosomatic Medicine, 64(3), 395–406.