Relationship Duration Research Articles

The Number and Potency of Endothelial Progenitor Cells in Type 2 Diabetes Mellitus Patients

BACKGROUND: Type 2 Diabetes Mellitus (T2DM) is a metabolic disease, due to the disorder of insulin function, insulin secretion, or both. Long-term hyperglycemia conditions promote endothelial dysfunction precedes to the development of multiple organ dysfunctions. Endothelial progenitor cells (EPCs) and hematopoietic stem cell (HSCs) are the key cellular effectors of postnatal neovascularization and play central role in endothelial dysfunction. However, in T2DM condition, the number of apoptotic HSCs increase, it may cause the reduction in potency and number of EPCs. In diabetes, the circulating EPCs number decrease and their functionality is impaired, but mechanism underlie of this impairement is unknown. The purpose of this study was to examine the relationship duration diabetes with the number and potency of EPC cells in T2DM patients controlled and poorly controlled.METHODS: Thirty-eight T2DM male patients were classified into two group based on Indonesian Society of Endocrinology/Perkumpulan Endokrinologi Indonesia (PERKENI) criteria on T2DM. The first group was a controlled glycemic condition group (hemoglobin A1c (HbA1C) <7.0%) and the second group was a poorly controlled glycemic condition group (HbA1C >7.0%). Cluster of differentiation (CD)34+ and CD133+ expressions were used as specific marker for EPC, while quantified bright aldehyde dehydrogenase (ALDHbr) assay was used to represented the potency of EPCs.RESULTS: This study showed that in poorly controlled T2DM group the number of EPCs was lower by 24.80% (p<0.05) compared to the T2DM controlled group. Similarly, the expression of ALDHbr was lower by 43.07% (p<0.05) in poorly controlled group.CONCLUSION: There was a decrease in the number and potency of EPCs in poorly controlled T2DM patients compared to the controlled T2DM patients. There was also a strong negative correlation between the duration of diabetes and number of EPCs.KEYWORDS: ALDHbr, endothelial progenitor cells, type 2 diabetes mellitus

A Cohort Perspective on the Demography of Grandparenthood: Past, Present, and Future Changes in Race and Sex Disparities in the United States

How has the demography of grandparenthood changed over the last century? How have racial inequalities in grandparenthood changed, and how are they expected to change in the future? Massive improvements in mortality, increasing childlessness, and fertility postponement have profoundly altered the likelihood that people become grandparents as well as the timing and length of grandparenthood for those that do. The demography of grandparenthood is important to understand for those taking a multigenerational perspective of stratification and racial inequality because these processes define the onset and duration of intergenerational relationships in ways that constrain the forms and levels of intergenerational transfers that can occur within them. In this article, we discuss four measures of the demography of grandparenthood and use simulated data to estimate the broad contours of historical changes in the demography of grandparenthood in the United States for the 1880–1960 birth cohorts. Then we examine race and sex differences in grandparenthood in the past and present, which reveal declining inequality in the demography of grandparenthood and a projection of increasing group convergence in the coming decades.

Suicide ideation, suicide attempts, their sociodemographic and clinical associates among the elderly Chinese patients with schizophrenia spectrum disorders

BackgroundIt is still unknown whether many well-identified risk factors of suicide could be applied to the elderly Chinese patients with schizophrenia. Methods1-month suicidal ideation and lifetime suicide attempts together with their sociodemographic and clinical associates were analyzed by retrospective data on 263 elderly patients with schizophrenia spectrum disorders at the Kangning Hospital, Shenzhen, China. T-tests and Chi-square tests were used to examine the differences between patients with and without suicidality. Backward stepwise logistic regression was performed to identify the associated factors. ResultsAmong the selected patients, 17.87% had 1-month suicide ideation and 7.60% had lifetime suicide attempts. It was further observed that the elderly patients with schizophrenia who had 1-month suicide ideation were more likely to report lifetime suicide attempts, suffer from severe hopelessness and negative symptoms, and have no pension. However, the backward stepwise logistic regression analyses revealed that lifetime suicide attempts and negative symptoms were most significantly associated with 1-month suicide ideation. In contrast, lifetime suicide attempters were more likely to be men, receive a pension, display symptoms of hopelessness, have longer duration of illness and poor family relationships. The regression analyses also indicated that only hopelessness, relatively long duration of schizophrenia, and poor family relationships were the most significantly associated with lifetime suicide attempts. LimitationsThe retrospective design do not allow for causal inferences. ConclusionsEarly interventions designed to decrease hopelessness, control negative symptoms, and improve family relationships may result in reduced risks of suicide among elderly Chinese patients with schizophrenia.

Brand love matters to Millennials: the relevance of mystery, sensuality and intimacy to neo-luxury brands

Purpose This paper aims to investigate the mediating effect of brand love on purchase intention and word-of-mouth through mystery, sensuality and intimacy as brand image dimensions in the context of neo-luxury brands. It also explores the moderating effect of duration and intensity of consumer-brand relationships on brand image dimensions. Design/methodology/approach The data collection was done via an online survey of a representative group of Millennials. Data analysis was performed using structural equation modeling and multi-group analysis. Findings The paper suggests that brand love mediates the relationship between brand image, purchase intention and word-of-mouth for both Apple and Michael Kors brands. This study also identifies differences in the effects of intimacy, sensuality and mystery on brand love. Additionally, it is demonstrated that the moderation effect of intensity and duration of consumer-brand relationships varies among the two neo-luxury brands. Research limitations/implications Further research should aim at investigating other categories of products and services in the field of neo-luxury, as this study focus on fashion and mobile brands. Other antecedents and outcomes of brand love should also be evaluated, as well as other moderating variables. Originality/value This paper contributes to the fast-growing consumer-brand relationships literature by exploring the role of brand love in the context of the emergent neo-luxury paradigm. It also intends to provide a better understanding of how to build and nurture an effective brand image through a multidisciplinary approach that combines mystery, sensuality and intimacy.

Expectations for Help Within and Across the Formal Boundaries of Executives’ Professional Advice Networks

We develop a theoretical framework for executives’ expectations for receiving help from professional contacts in their advice networks across national (local/nonlocal) and organizational (inside/outside) boundaries. Moreover, we examine the effects of relational duration and trust in the relationships. In a study using unique data on 1807 professional relationships in a US-headquartered multinational consulting firm, we find that executives expect less help from outside contacts. This result is partially mediated by trust. Also, relational duration mitigates expectations for help from outsiders. Surprisingly, we find no evidence that executives expect less help from nonlocal contacts. Yet a test of nonlocal professional contacts reveals that geographic distance rather than cultural distance, affects the expectations for help. Another supplemental analysis shows that the type of help provided in the network influences the effects of organizational and national boundaries.

Creativity and romantic passion.

Romantic passion typically declines over time, but a downward trajectory is not inevitable. Across 3 studies (1 of which encompassed 2 substudies), we investigated whether creativity helps bolster romantic passion in established relationships. Studies 1A and 1B revealed that people with highly creative personalities report not only greater overall passion but also an attenuation in the tendency for passion to decline as relationship duration increases. Studies 2 and 3 explored positive illusions about the partner's physical attractiveness as a possible mediator of the effect of creativity on passion. Cross-lagged panel analyses in Study 2 indicated that being creative is linked to a tendency to view the partner as especially attractive, even relative to the partner's own self-assessment. Path analyses in Study 3 provided longitudinal evidence consistent with the hypothesis that positive illusions about the partner's attractiveness (participant's assessments, controlling for objective coding of the partner's attractiveness) mediate the link between creativity and changes in passion over time. Study 3 also provided longitudinal evidence of the buffering effect of creativity on passion trajectories over time, an effect that emerged not only for self-reported passion but also for objectively coded passion during a laboratory-based physical intimacy task 9 months later. A meta-analytic summary across studies revealed a significant overall main effect of creativity on passion, as well as a significant moderation effect of creativity on risks of passion decline (e.g., relationship length). (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Moving in Sync: Hourly Physical Activity and Sedentary Behavior are Synchronized in Couples.

Overall time spent in moderate-to-vigorous intensity physical activity (MVPA) and sedentary behavior are both correlated in couples. Knowledge about the nature and psychosocial correlates of such dyadic covariation could inform important avenues for physical activity promotion. The present study investigates hour-by-hour covariation between partners (i.e., synchrony) in MVPA and sedentary behavior as partners engage in their daily lives and links it with person-level MVPA/sedentary behavior, temporal characteristics, and relationship variables. We used 7-day accelerometer data from two couple studies (Study 1, n = 306 couples, aged 18-80 years; Study 2, n = 108 couples, aged 60-87 years) to estimate dyadic covariation in hourly MVPA and sedentary behavior between partners. Data were analyzed using coordinated multilevel modeling. In both studies, hourly MVPA and sedentary behavior exhibited similarly sized dyadic covariation between partners in the low-to-medium range of effects. Higher MVPA synchrony between partners was linked with higher individual weekly MVPA and higher individual weekly sedentary levels, whereas higher sedentary synchrony between partners was associated with higher individual weekly MVPA but lower individual weekly sedentary levels. MVPA and sedentary synchrony were higher in the morning and evening, more pronounced on weekends, and associated with more time spent together, longer relationship duration, and time-varying perceptions of higher partner closeness. This study demonstrates that MVPA and sedentary behaviors do not occur in a social vacuum. Instead, they are linked with close others such as partners. Thus, capitalizing on social partners may increase the effectiveness of individual-level physical activity interventions.

Mate preferences for educated partners: Similarities and differences in the sexes depend on mating context

Evolutionary and sociocultural models of mate preferences suggest that education might be an important consideration for men and women, but this research is characterized by several limitations warranting more research. In this experiment (N = 1306), we focused on the impact of relative levels of education on the desirability of potential long-term and short-term mates, while holding physical attractiveness constant, and also examining the potential moderating influence of interpersonal warmth. Both sexes preferred mates of equal education (compared to less or more), for both relationship durations, but particularly for long-term mates. Men found less educated and interpersonally cold targets more appealing in the short-term context. Overall, men found targets more appealing than women did across both mating contexts. Our results replicate and extend research on the role of partner's education in people's mate preferences.

Lending technologies, banking relationships, and firms’ access to credit in Italy: the role of firm size

ABSTRACTThis paper analyses the role of lending technologies and banking relationships on firms’ credit access in Italy. Using EFIGE firm-level data, we show that the depth and strength of firm–bank relationships have heterogeneous effects on credit demand and rationing probabilities depending on the size of the borrower. Multiple banking relationships alleviate financial constraints for small firms, while borrowing from a large number of lenders hinders access to credit for large companies. Small and medium-sized enterprises with a higher share of debt with the main bank have a lower probability of being credit denied, as debt concentration contributes to overcome the opacity problems typical of the SMEs. Long-lasting relationships, by reducing information asymmetries, significantly improve access to credit for small and large firms. Conversely, we find that medium-sized enterprises are more exposed to financing constraints as relationship duration increases, due to possible lock-in effects. Finally, firms maintaining banking relationships based on transactional technologies are more likely to be credit denied, while the use of relationship lending technologies improves credit availability for both small and large enterprises.

Differences in Romantic Relationship Experiences for Individuals with an Autism Spectrum Disorder

Individuals with an autism spectrum disorder (ASD) experience varying difficulties, for many this includes romantic relationships. Existing research in this area is mixed and suggests that compared to typically developing (TD) individuals, those with ASD have a similar level of romantic interest, but less relationship success and lower satisfaction with romantic connections. We aimed to explore one of the many pathways to positive relationship experience, and how these may differ for individuals with an ASD. We recruited 459 individuals (232 diagnosed with ASD) internationally, with 64% being female, a result of the internet-based sampling method. Each participant completed an online battery including the Sexual Behaviour Scale—third edition. Compared to TD individuals, those with ASD reported a similar level of interest in relationships, but reported fewer opportunities to meet potential new partners, had shorter relationship duration, and greater concern about their future relationships. Peer social engagement was found to partially mediate the relationship between diagnostic status and relationship difficulties. This was true for both males and females. Additionally, those with ASD reported learning less about sexuality from their peers and experiencing greater anxiety when meeting a potential partner. The current study identifies some factors and pathways that lead to positive relationship functioning among those with ASD. This will be useful for clinician’s who support individuals on the autism spectrum, as it will assist those individuals seeking to establish or maintain positive romantic relationships.

Asymptomatic Bacterial Vaginosis in Pregnancy and Missed Opportunities for Treatment: A Cross-Sectional Observational Study.

Background High rates of bacterial vaginosis (BV) have been described in nonpregnant South African women. Studies of BV in South African pregnant women are sparse. Diagnosis and prompt treatment of BV in pregnancy are expected to have a positive impact on pregnancy outcomes and HIV prevention. This study was undertaken to determine the prevalence of BV in pregnant women in a high HIV burden periurban setting in KwaZulu-Natal and explore how to enhance BV diagnosis in this setting where syndromic management of sexually transmitted diseases is the standard of care. Methods In this cross-sectional study, consenting HIV uninfected pregnant women were examined for abnormal vaginal discharge; nurses determined the vaginal pH and collected a vaginal swab for Gram-stain and Nugent scoring. Findings Among 750 HIV uninfected pregnant women, 280 (37.3%; 95%CI 33.9-40.9) tested positive for BV. Using a vaginal pH > 4.4, 65% of women with BV were correctly identified, while an abnormal vaginal discharge correctly identified a significantly lower proportion (52.9%) of women with BV (p=0.005). The sensitivity, specificity, and positive and negative predictive values of vaginal pH testing were 65.9% (95%CI 60.0 – 71.5%), 61.4% (95%CI 56.8 – 65.9%), and 50.1% and 75.4%, respectively. The 20-24 year-old pregnant women were twice more likely to test positive for BV than the adolescent pregnant women (43.6% vs 21.1%) (p = 0.037) and BV was not associated with the duration of a sexual relationship, frequency of unprotected sex during pregnancy, number of lifetime sex partners, or the partner's age. Conclusion There is a high burden of primarily asymptomatic BV in HIV uninfected pregnant women in this periurban setting. Both the sensitivity and specificity of vaginal pH testing are superior to the symptomatic diagnosis of BV but not good enough to be used as a screening tool.

How Supplier Economies of Scale Drive Supplier Selection Decisions

Supplier selections are complex but nonetheless strategically important decisions that are influenced by numerous factors. Drawing on the resource‐based and relational view of the firm, we investigate how suppliers’ economies of scale influence the buyer's selection decision, and we illustrate how the influence of scale is contingent upon important economic, buyer, and relationship characteristics. We test the model with a large secondary dataset of actual supplier selection decisions from the automotive industry and show that economies of scale have a strongly positive but diminishing effect on the buying firm's supplier selection decision. These effects are reinforced or extenuated by economic, buyer, and relationship characteristics, with characteristics that are more specific to the buyer‐supplier situation (e.g., relationship duration and power balance) having a stronger moderating effect than do characteristics that are more global (e.g., economic cycle). Our research helps suppliers to better understand how to manage selection probabilities with buyers and provides buying firms with a better understanding of how contextual factors affect the benefit of supplier‐provided economies of scale.

Adaptation and Psychometric Properties of the Persian Version of the Coalitional Mate Retention Inventory (CMRI).

Mate retention behaviors are designed to reduce the likelihood of partner infidelity and relationship withdrawal. We investigated the psychometric properties of the Persian translation of The Coalitional Mate Retention Inventory (CMRI) in Iran and explored the sex differences in the performance frequencies of these behaviors. Participants in a committed heterosexual romantic relationship (n = 508, 270 female and 238 male) were drawn from a community sample. Participants reported demographic information (including age, duration of relationship), the Persian translation of CMRI, and the Persian translation of the Mate Retention Inventory-Short Form. The results of the confirmatory factor analyses demonstrated a good fit of the CMRI seven-factor model and achieved good reliability for CMRI and its subscales. We further documented sex differences in the frequency with which coalitional mate retention behaviors were performed. The results revealed that CMRI is a valuable instrument for assessing mate retention across diverse cultures.

Do Male Couples Agree on Their Sexual Agreements? An Analysis of Dyadic Data.

Male couples often formulate sexual agreements, but little is known about the extent to which partners concur about their exact terms. Disagreements, particularly with respect to sex outside the relationship, may induce stress and potentially increase the risk of HIV and other sexually transmitted infections. Our study sought to describe concordance between male partners on several aspects of their sexual agreements, overall, as well as stratified by dyadic HIV serostatus and relationship duration. Between July 2014 and May 2016, we collected bidirectional data from 160 male couples residing in Atlanta, Boston, and Chicago. Overall, we observed weak concordance for whether or not couples had a mutual agreement about sex with outside partners. Even among 110 couples in which both partners reported having an agreement, there was weak-to-moderate concordance for general rules that might apply to having sex outside the relationship (e.g., forming emotional relationships is not allowed, outside sexual activities must be disclosed), and for specific sexual behaviors allowed or disallowed (e.g., topping without a condom, bottoming without a condom). Concordance for the type of sexual agreement was higher within HIV seroconcordant negative partnerships compared to HIV serodiscordant partnerships, and lower within relationships ≥ 5years and 1 to < 5years compared to those < 1year. Dyadic interventions for male couples (e.g., couples HIV testing and counseling, relationship education programs) can offer unique opportunities for skills building around negotiating sexual agreements and might especially benefit HIV serodiscordant partnerships, and those in the formative stages of their relationships.

Love with HIV: A Latent Class Analysis of Sexual and Intimate Relationship Experiences Among Women Living with HIV in Canada.

Love remains hidden in HIV research in favor of a focus on risk. Among 1424 women living with HIV in Canada, we explored (1) whether eight facets of sex and intimacy (marital status, sexual activity, physical intimacy, emotional closeness, power equity, sexual exclusivity, relationship duration, and couple HIV serostatus) may coalesce into distinct relationship types, and (2) how these relationship types may be linked to love as well as various social, psychological, and structural factors. Five latent classes were identified: no relationship (46.5%), relationships without sex (8.6%), and three types of sexual relationships-short term (15.4%), long term/unhappy (6.4%), and long term/happy (23.2%, characterized by equitable power, high levels of physical and emotional closeness, and mainly HIV-negative partners). While women in long-term/happy relationships were most likely to report feeling love for and wanted by someone "all of the time," love was not exclusive to sexual or romantic partners and a sizeable proportion of women reported affection across latent classes. Factors independently associated with latent class membership included age, children living at home, sexism/genderism, income, sex work, violence, trauma, depression, HIV treatment, awareness of treatment's prevention benefits, and HIV-related stigma. Findings reveal the diversity of women's experiences with respect to love, sex, and relationships and draw attention to the sociostructural factors shaping intimate partnering in the context of HIV. A nuanced focus on promoting healthy relationships and supportive social environments may offer a more comprehensive approach to supporting women's overall sexual health and well-being than programs focused solely on sexual risk reduction.

A dynamic power-law sexual network model of gonorrhoea outbreaks.

Human networks of sexual contacts are dynamic by nature, with partnerships forming and breaking continuously over time. Sexual behaviours are also highly heterogeneous, so that the number of partners reported by individuals over a given period of time is typically distributed as a power-law. Both the dynamism and heterogeneity of sexual partnerships are likely to have an effect in the patterns of spread of sexually transmitted diseases. To represent these two fundamental properties of sexual networks, we developed a stochastic process of dynamic partnership formation and dissolution, which results in power-law numbers of partners over time. Model parameters can be set to produce realistic conditions in terms of the exponent of the power-law distribution, of the number of individuals without relationships and of the average duration of relationships. Using an outbreak of antibiotic resistant gonorrhoea amongst men have sex with men as a case study, we show that our realistic dynamic network exhibits different properties compared to the frequently used static networks or homogeneous mixing models. We also consider an approximation to our dynamic network model in terms of a much simpler branching process. We estimate the parameters of the generation time distribution and offspring distribution which can be used for example in the context of outbreak reconstruction based on genomic data. Finally, we investigate the impact of a range of interventions against gonorrhoea, including increased condom use, more frequent screening and immunisation, concluding that the latter shows great promise to reduce the burden of gonorrhoea, even if the vaccine was only partially effective or applied to only a random subset of the population.

The association of disordered eating and sexual health with relationship satisfaction in female service members/veterans.

Low relationship satisfaction is associated with mental health disorders in service members/veterans (SM/Vs), yet eating disordered behavior (EDB) and sexual function and satisfaction in SM/Vs are understudied. Those with EDB may experience bodily discomfort that may be associated with low relationship satisfaction because of avoidance of physical contact and intimacy, suggesting that sexual satisfaction and function may modify the association of EDB and relationship satisfaction. As the majority of female SM/Vs are partnered, it is imperative to study the association of sexual function and satisfaction with EDB and relationship satisfaction. Partnered female SM/Vs (N = 479) completed an online survey assessing demographic characteristics (e.g., relationship duration, deployment history), EDB, sexual satisfaction and function, and relationship satisfaction measures. Thirty-three percent, 20%, and 58% of the sample reported scores consistent with relational distress, probable eating disorder, and sexual dysfunction, respectively. After adjusting for covariates, EBD was negatively associated with relationship satisfaction with a small-to-medium effect size. Sexual satisfaction and function had a significant indirect effect on the association of EDB and relationship satisfaction, suggesting that sexual satisfaction and function accounted for some of the variance between these 2 variables. Screening for EDB, sexual satisfaction, and sexual function among partnered female SM/Vs may provide critical insight into mechanisms of relational distress. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Differences in the Perceived Attractiveness of Non-contact and Combative Athletes' Facial Pictures

Abstract Female mating strategies and partner preferences are influenced by many factors. Depending on the life context, the preference for either a long-term or a short-term relationship, the willingness to have off-spring, or the current fertility conditions can be key factors. Differences can largely be traced to the perception of physical masculinity and the ability to provide and raise offspring. This study seeks to obtain data that will help to describe changes in the female perception of the attractiveness of facial photographs of male elite golfers (non-contact sport) and MMA fighters (combative sport) in connection with the following factors: age, sexual activity/passivity, use of hormonal contraceptives, duration of actual relation-ship, and number of children. Data for this study were collected using an anonymous questionnaire that included photos of the athletes in a random order and a 1-10 rating scale (10 indicating the most attractive). The research sample consisted of 1,035 female participants. The statistical significance was analyzed using the Kruskal-Wallis and Mann-Whitney U tests, Eta2, and Cohen's d for the average ratings of the contact and non-contact athletes. The female participants slightly preferred the golfers’ pictures. This preference grew significantly with age and number of children. A possible explanation for these results may be the participants’ decreasing fertility or the willingness to have another child in the Czech socio-culture. In such cases, the strong masculine features typical of combative athletes could be less important. In contrast to some earlier findings, contraceptive use did not affect the perception of male attractiveness compared to the entire sample's average ratings, furthermore, neither did sexual activity/passivity.

Who meets online? Personality traits and sociodemographic characteristics associated with online partnering in Germany

The Internet has partly displaced traditional offline meeting venues for partners. Here, we study whether meeting online is selective, i.e., whether there are differences in Big Five personality traits and sociodemographic background characteristics between those who meet online and offline. Using eight waves of the German Family Panel (pairfam), with observations from 7192 respondents from three birth cohorts (1991–93, 1981–83, and 1971–73) between 2008 and 2016, we found that meeting online is more likely for female respondents than males; for respondents from the older birth cohorts compared to the youngest one; for respondents with primary education compared to those who are currently enrolled and have no degree; for respondents who have shorter relationship durations; for those who have a higher number of previous partners; and for those who have less extroverted personalities. As we split the data by cohorts, it appears that meeting a partner online is slightly more selective for the oldest birth cohort than for the youngest one. Moreover, extraversion was consistently associated with meeting online in every birth cohort, and the association was negative in every case. These findings are discussed with reference to compensation and rich-get-richer hypotheses.

What would you know about it? Managing ingroup vs. outgroup perceived support of same-sex vs. mixed-sex romantic relationships

Social support for relationships is an important predictor of relationship well-being, duration, and mental and physical health. But does the source of the support matter? This article examines whether there is potential moderation by the ingroup versus outgroup status of the person offering the support. Specifically, in a sample of 407 individuals in mixed-sex versus same-sex relationships, we assessed how much social support individuals perceived for their relationship from members of their social network who were queer versus straight. Those in same-sex relationships had significantly more queer members within their social networks than those in mixed-sex relationships (38.6% vs. 8.1%). We found that although those in both types of relationships perceived more support for their relationships from ingroup network members, only those in mixed-sex relationships demonstrated a stronger association between ingroup (straight) support and relationship well-being. Those in same-sex relationships showed relatively weak associations between network members’ support for the relationship and their relationship well-being, regardless of source. Results are interpreted in light of the social identity perspective, and we also discuss the potential for attributional ambiguity and discounting of others’ opinions about their relationships within the context of same-sex relationships.