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PubMed2004

Impact of functional support on health-related quality of life in patients with colorectal cancer.

BACKGROUND: It has been shown that social integration and the availability of social support influence quality of life. However, little is known about the relation between social support and mental and physical health in patients with colorectal cancer. In the current study, the authors examined the effects of social network size, as well as emotional and instrumental support, on health-related quality of life (HRQOL) in patients with colorectal cancer. METHODS: Six hundred thirty-six veterans with colorectal cancer were asked to complete a telephone interview, which included a measure of social support (the Berkman-Syme Index) and the Medical Outcomes Study Short Form 12-Item Survey. Mean physical composite scale (PCS) and mental composite scale (MCS) scores were compared across groups. RESULTS: No difference in mean PCS or MCS scores was found between patients who had larger social networks and patients who had smaller social networks. The availability of emotional and instrumental support was associated with higher MCS scores, whereas the availability of instrumental support was associated with lower PCS scores. CONCLUSIONS: Irrespective of network size, the availability of emotional support and instrumental support had an impact on HRQOL in patients with colorectal cancer. More emphasis needs to be placed on understanding how various types of social support, individually and collectively, influence physical and mental health in patients with colorectal cancer.

Activities of Daily Living↗
PubMed2006

Phenomenological models of socioeconomic network dynamics.

We study a general set of models of social network evolution and dynamics. The models consist of both a dynamics on the network and evolution of the network. Links are formed preferentially between "similar" nodes, where the similarity is defined by the particular process taking place on the network. The interplay between the two processes produces phase transitions and hysteresis, as seen using numerical simulations for three specific processes. We obtain analytic results using mean-field approximations, and for a particular case we derive an exact solution for the network. In common with real-world social networks, we find coexistence of high and low connectivity phases and history dependence.

Journal Article↗
PubMed1986

An examination of the relation of individual difference variables to loneliness.

This study investigated the relation of five individual difference variables (extroversion, depression, self-esteem, neuroticism, and attitude toward others) to loneliness. The relative contributions of two different models that might explain these relations were examined. One model suggests that individual difference variables are related to loneliness through the mediation of social network variables; that is, individual difference variables may reduce people's motivation and/or ability to build and maintain social relationships, which in turn leads to loneliness. The second model, the cognitive bias model, states that both the individual difference variables and loneliness are influenced by the same intrapersonal, cognitive processes. Some people are prone to negative affect and tend to evaluate themselves and their relationships negatively. The relations of self-esteem, neuroticism, and depression to loneliness were hypothesized to reflect the cognitive bias model, while extroversion and attitudes toward others were hypothesized to be related to loneliness through the mediation of social network variables. Eighty-two female and 42 male adults completed measures of loneliness and the five individual difference variables, as well as an instrument assessing their social networks. The results indicated partial support for both models for each of the individual difference variables. Together, the two models did a good job of explaining the correlations of the individual difference variables and loneliness. The implications of these findings, as well as their relation to previous research, are discussed.

Adult↗
PubMed2005

Subgraphs and network motifs in geometric networks.

Many real-world networks describe systems in which interactions decay with the distance between nodes. Examples include systems constrained in real space such as transportation and communication networks, as well as systems constrained in abstract spaces such as multivariate biological or economic data sets and models of social networks. These networks often display network motifs: subgraphs that recur in the network much more often than in randomized networks. To understand the origin of the network motifs in these networks, it is important to study the subgraphs and network motifs that arise solely from geometric constraints. To address this, we analyze geometric network models, in which nodes are arranged on a lattice and edges are formed with a probability that decays with the distance between nodes. We present analytical solutions for the numbers of all three- and four-node subgraphs, in both directed and nondirected geometric networks. We also analyze geometric networks with arbitrary degree sequences and models with a bias for directed edges in one direction. Scaling rules for scaling of subgraph numbers with system size, lattice dimension, and interaction range are given. Several invariant measures are found, such as the ratio of feedback and feed-forward loops, which do not depend on system size, dimension, or connectivity function. We find that network motifs in many real-world networks, including social networks and neuronal networks, are not captured solely by these geometric models. This is in line with recent evidence that biological network motifs were selected as basic circuit elements with defined information-processing functions.

Journal Article↗
PubMed1995

Social relationships and abstinence from cocaine in an American treatment sample.

In an extension of earlier work relating social-relationship variables to post-treatment abstinence from abused drugs, 104 cocaine users were studied for 6 months after completing drug treatment. Social-relationship variables included social integration, perceived support and social-network cocaine use. The effects of social relationships on cocaine abstinence tended to be conditional on race. Greater social integration predicted abstinence for Caucasian Ss (n = 54), but not African-Americans (n = 50). Similar results occurred for perceived support. Social network drug-use data also showed race differences: the absence of current cocaine users and the presence of former users predicted abstinence only for Caucasians. Interpretation of these findings is complicated by the relationship we observed between race and route of cocaine administration, with African-American Ss far more likely than Caucasians to be crack smokers or injection users as compared to intranasal users. The effects of race could not be disentangled from the effects of route. Future studies of social relationships and cocaine abstinence should focus on identifying social factors that are protective for African-Americans and for smokers/injectors. Such studies are critical precursors to designing successful social-support interventions.

Adult↗
PubMed2003

Social behavior in aged rhesus macaques.

This study investigated the relationship between chronological age and social behavior in 42 adult male and female rhesus macaques (Macaca mulatta) in three specific areas: social interactions, social roles, and social networks. While both old males and old females share behavioral differences associated with senescence, this study reports that old females and old males are distinct in their social behaviors, both from each other and from other adults. Many of these differences appear progressive across age classes, e.g., declining across age classes in females and increasing across age classes in males. Old females are less social and have smaller social networks than other females, while the opposite was found to be true of old males. An explanation for the sex-based differences in aged social behavior and social networks reported in this study may originate in rhesus matrifocal social structure.

Aging↗
PubMed2005

The voices of older women in a disadvantaged community: issues of health and social capital.

The voices of older women are rarely heard in debates about the health of disadvantaged groups. Despite growing interest in health in old age, the health experiences of older women as gendered social beings have yet to be fully explored. Their potential to contribute positively to family and community health is seldom acknowledged. The aim of this article is to present findings from a qualitative British Health Development Agency funded project on the relationship between social capital, health and gender, focusing on the health and social networks of older women in a socially disadvantaged community in the north of England. Seventy-seven community members were interviewed, of these 19 were older women aged 55-78 years. Their accounts of ill health in the context of ageing were analysed to explore the intricate ways in which social capital was created, maintained and linked to health. Findings suggest that social constructions of motherhood and caring underpinned responsibility for their own and others' health. Their experiences of dealing with health matters, together with frequent health talk, gave the women confidence as lay health experts, enabling them to contest medical advice. Drawing on personal experiences of trust and reciprocity, they recognised the importance of social networking in alleviating the problems of loneliness and isolation. At stressful times in their lives they were able to draw on existing support networks and, in spite of occasional personal conflicts, some benefited from the empowering and health-enhancing role of formal and informal participation in community life. These findings indicate that older women can operate autonomously in health matters and can substantially influence the development of healthy communities, although this can sometimes be at a personal cost.

Aged↗
PubMed2005

The selection of family planning discussion partners in Nepal.

There is growing evidence that the information women receive about family planning from their social network is influential in their decisions to use a contraceptive method. Less is known, however, regarding the role individuals play in constructing their social network and, thereby, determining the nature of its influence. This study examined the criteria women use to select their family planning discussion partners and the individual-level factors that promote the addition of a contraceptive user to one's discussion network. Sociometric data were collected in November 1997 and February 1999 from all currently married women aged 15 to 49 years in three villages of Dang District in the Mid-Western Region of Nepal (panel N = 281). Preference for women from one's ethnic group and the strategic selection of contraceptive users was observed. Contraceptive use and attitudes toward family planning were both positively associated with the addition of a contraceptive user to one's discussion network, suggesting that women seek contraceptive users to confirm their existing beliefs and behaviors. Understanding the dynamics of social network formation can assist programs to better utilize the behavior change potential of peer networks.

Adolescent↗
PubMedDate not supplied

Understanding communities of neglectful parents: child caregiving networks and child neglect.

This article focuses on family social networks and the community of caregivers of neglected children. If neglect is part of family functioning, who watches over the children? Using a case study approach, this study researched 12 children and their parents. Several concepts, such as multiple caregiving and kin keepers, revealed that study children were cared for by many people. Social network mapping used in this study indicated that families were not isolated from the larger community, had various forms of negative and positive social support, were low income, and were involved in substance abuse and domestic violence. Understanding the patterns that emerge from the complex web of family, friends, social service agencies, and the larger social community in which neglected children live can result in better community building.

Adult↗
PubMed1981

The health-related functions of social support.

Social support research has been hampered by a lack of clarity both in the definitions of social support and in the conceptualization of its effects on health outcomes. The present study compared social network size and three types of perceived social support--tangible, emotional, and informational--in relation to stressful life events, psychological symptoms and morale, and physical health status in a sample of 100 persons 45-64 years old. Social network size was empirically separable from, though correlated with, perceived social support and had a weaker overall relationship to outcomes than did support. Low tangible support and emotional support, in addition to certain life events, were independently related to depression and negative morale; informational support was associated with positive morale. Neither social support nor stressful life events were associated with physical health. It was concluded that social support research would benefit from attention to the multidimensionality of support and greater specificity in hypotheses about the relationship between types of support and adaptational outcomes.

Adaptation, Psychological↗
PubMed2006

Social context of needle selling in Baltimore, Maryland.

Although much of the debate surrounding the distribution of sterile syringes to injection drug users (IDUs) has focused on needle exchange programs (NEPs), IDUs acquire their syringes from three major sources: NEPs, pharmacies, and secondary exchangers or needle sellers. The purpose of the present study is to examine types and frequencies of social interactions among drug injectors who sell needles, most of which come from NEPs, compared with individuals who do not sell needles. Specifically, we compared engagement in drug-related behaviors, roles in the drug economy, and social network membership. Data were collected as part of the SHIELD study, an HIV prevention intervention targeted at drug users and their social networks (n=910) from February 2001 through September 2003 in Baltimore, Maryland (USA). In this sample, 56 participants reported selling needles. Needle sellers had higher levels of engagement in drug-related social interactions, including using drugs with others, giving or receiving drugs from others, and buying drugs with other users. Participants who sold needles had a significantly higher number of roles in the drug economy. Also, they had more social network members who were injectors, with whom they talked about risky drug behaviors, gave needles to, and shared cookers and bleach with. Compared with nonselling injectors, needle sellers engage in HIV risk-related behaviors, such as injecting daily and sharing injection equipment, more frequently. The study's findings may be useful to determine whether secondary exchangers should be targeted for HIV prevention activities both to reduce their own risk and to diffuse risk reduction information throughout the drug using community.

Acquired Immunodeficiency Syndrome↗
PubMed2005

Anatomical differences in the mirror neuron system and social cognition network in autism.

Autism spectrum disorder (ASD) is a neurodevelopmental disorder associated with impaired social and emotional skills, the anatomical substrate of which is still unknown. In this study, we compared a group of 14 high-functioning ASD adults with a group of controls matched for sex, age, intelligence quotient, and handedness. We used an automated technique of analysis that accurately measures the thickness of the cerebral cortex and generates cross-subject statistics in a coordinate system based on cortical anatomy. We found local decreases of gray matter in the ASD group in areas belonging to the mirror neuron system (MNS), argued to be the basis of empathic behavior. Cortical thinning of the MNS was correlated with ASD symptom severity. Cortical thinning was also observed in areas involved in emotion recognition and social cognition. These findings suggest that the social and emotional deficits characteristic of autism may reflect abnormal thinning of the MNS and the broader network of cortical areas subserving social cognition.

Adult↗
PubMed1997

Changes in network characteristics and HIV risk behavior among injection drug users.

Studies indicate that HIV risk behaviors vary greatly among injection drug users (IDUs). The source of such variation is often ascribed to individual differences, but much of it is due to how IDUs are grouped into social networks. Nevertheless, given the turbulent and uncertain lives led by many IDUs, it would not be surprising if their social networks changed substantially over time. We used data from a study of the social networks of IDUs in Chicago and Washington, DC, to examine changes in individual behavior and network characteristics over time. The results indicated few changes in standard network measures, such as density of ties or network size, over time. However, specific network change measures, that is, indicators of movement into and out of networks, showed significant movement of network members over time. Moreover, movement of members into a network significantly predicted a higher likelihood of risky injection drug use over time. We suggest that these movements are indicative of a lack of a stable resource base among IDU networks.

Adolescent↗
PubMed2004

Distinct psychosocial differences between women with coronary heart disease and cardiac syndrome X.

AIMS: To compare the impact of oestrogen, gynaecological history, social support, life events and family history of CHD on psychosocial morbidity in syndrome X, CHD patients and healthy controls. METHODS AND RESULTS: 100 female syndrome X (60 +/- 9 years), 100 female CHD (65 +/- 9 years) and 100 healthy female volunteers (61 +/- 10 years) completed the hospital anxiety and depression scale (HADS), health anxiety questionnaire (HAQ), a demographic information scale, life events scale, family history of CHD, menopausal, menstrual and gynaecological history. A 17beta-oestradiol sample was taken. Syndrome X patients had higher levels of life interference (p < 0.05) and HADS anxiety (p < 0.05) than CHD patients, and higher levels of all HADS and HAQ scales than controls (p < 0.01). Syndrome X patients with a large social network had lower HADS anxiety (p < 0.05), health worry (p < 0.05), life interference (p < 0.01) and total HAQ (p < 0.01). Social network (p = 0.003), divorced/separated or widowed status (p = 0.005), HRT (p = 0.008) and HADS anxiety score (p < 0.001) accounted for 41.9% of the variance in HAQ scores in syndrome X. Oestrogen was unrelated to the HADS or HAQ for any group. CONCLUSION: Syndrome X patients suffered higher levels of psychological morbidity in comparison to CHD patients and controls. Life events and social network size were related to health anxiety, general anxiety and depression in women with syndrome X.

Anxiety↗
PubMedDate not supplied

[A model for integrating mental health care resources in the rural population of Mexico].

OBJECTIVE: The purpose of this project was to identify behaviors of health service utilization to solve mental health-related problems among rural inhabitants of Mexico. A model of pathways to mental health services was built. Based on this model, an integration-intervention model is proposed to help improve access to mental health services and their quality. MATERIAL AND METHODS: In 1997, in-depth interviews were conducted among 21 adults (9 men and 12 women) and seven healthcare providers, in a rural community in Jalisco, Mexico. Women's age ranged from 23 to 44 years; ten were married and two single. Men were between 30 and 74 years old; eight were married and one was a widower. Healthcare providers in the same community were: a priest, a general physician, a pharmacy clerk, two nurses, and two traditional healers. RESULTS: The pathways models suggest that the first attempt a person does to solve a symptom is self-care. When such strategies are not sufficient to relief the symptom, the person turns to the members of his/her social network for help, who in addition to providing information about remedies, offer their emotional and instrumental support. If after consulting the social network, the symptom is not relieved, the individual seeks help from other external resources, such as the members of the ethnomedical local system. Inhabitants of rural communities tend to seek help from physicians, only when the symptom persists and the suffering associated with it seems to be out of the individual's control, or if members of the social network or the ethno-medical local system refer the patient to the physician. Seeking help from a specialist in mental health (psychiatrist or psychologist) is quite improbable among the rural inhabitants of Mexico, mostly due to difficulties in accessing these services, such as geographical location, distance, transportation, cost, and cultural distance between the health providers and the patient. CONCLUSIONS: In order to conduct successful intervention programs that are culturally sensitive for rural inhabitants, it is necessary first, to have detailed information derived from research and second, the active participation of all human and institutional resources, from professionals and truly multi-disciplinary researchers, to educators, social, religious, political leaders, and members of the communities and local institutions. The proposed model of integration of personal and community resources for healthcare requires establishing programs that sensitize, inform, and train community members, as well as members the ethno-medical system and the formal heath system.

Adult↗
PubMed1991

{State of health and social support networks of natural female caregivers of mentally ill persons}.

Studies of the health and family situation of natural caregivers of the mentally ill do not indicate the gender of the principal caregiver. Consequently, they do not provide details about the health or the social support networks of women, who, in general, are the ones who assume the caregiving role. The purpose of this study of 61 female natural caregivers living with mentally ill patients was to describe the state of health of these natural caregivers as well as their social support from both neighbours and professionals. Another purpose was to verify the existence of relationships among these variables. Four health variables are studied: emotional distress, well-being, perception of general health, and number of health problems. Support from both neighbours and professionals is examined from the point of view of the caregivers' needs and the satisfaction felt by the caregivers, and according to several functions of social support. Descriptive analyses show that at least half of the natural caregivers suffer from emotional distress, diminished well-being, and various health problems. When support from neighbours is considered, the caregivers express numerous needs; two thirds of the caregivers declare themselves satisfied except in regard to their need to socialize. Regarding professional support, caregivers express fewer needs and seem less satisfied by the support received. Regression analyses demonstrate that two of the four predictors of neighbour support contribute significantly, though modestly, to the variations of emotional distress; one of those predictors also contributes to variations in the perception of general health. No significant relation was found for professional support. Recommendations are made for future research and for preventive interventions with women who are natural caregivers.

Aged↗
PubMedDate not supplied

The path to well-being among elderly Arab Israelis.

The purpose of this inquiry was to test a path model that explains how sociodemographic background characteristics, functional health state, social network structure, and extent of activity affect well-being among elderly Arab Israelis, a population in transition from an agrarian to a modern culture. Using data from a national survey, the study revealed that respondents' morale was negatively associated with functional disability and positively associated with social network and activity level. Disability was predicted by lower income and education, older age, and female gender. Activity level was predicted by low disability, male gender, education, and social network. The study results provide support for the contention that the path to successful aging is universal. However, the results also suggest that within the general path to a good old age one can find culturally unique characteristics. In the case of older Arab Israelis, these included belonging to community- and family-oriented network structures and engaging in socially oriented activity.

Activities of Daily Living↗
PubMed1994

Type A behavior and social support among employed women.

The current study investigated the relation between Type A behavior and social support among working women. The research design closely paralleled a previous study of employed men. A convenience sample of 89 employed women (age range, 22-58 years) completed the Jenkins Activity Survey (JAS), a short aggression scale, a questionnaire designed to measure their proneness to seek support in problem situations, and a questionnaire assessing both structural and functional aspects of their social network. As was true with their male counterparts, the Type A women were less inclined than were Type B women to consider family as important members of their social network. Unlike Type A men, however, Type A women did not appear to close themselves off from their social network. Instead, Type A women were more likely to report feeling that they were not sufficiently cared for or loved.

Adult↗