Introduction This study examined the moderating role of positive emotion in the relationship between trait-like stress reactivity and negative emotion, and whether this moderating effect varies by cognitive performance and cognitive decline across nine years. Methods Using data from 2,041 participants in the Midlife in the United States (MIDUS) study (mean age = 65.52 years), hierarchical regression models were conducted to predict negative emotion from trait-like stress reactivity, positive emotion, and their interaction, controlling for age, gender, years of education, depressed mood, and neuroticism. Simple slope analyses were conducted to test the direction of significant interactions. Analyses were repeated within subgroups of cognitive performance and cognitive decline across 9 years. Results The interaction between positive emotion and trait-like stress reactivity was significant, with higher positive emotion associated with a weaker relationship between stress reactivity and negative emotion. This moderating effect was observed across low, moderate, and high cognitive performance groups; a three-way interaction further indicated that the moderating effect becomes stronger as cognitive performance increases. For cognitive decline, the moderating effect was significant only among individuals with relatively greater cognitive decline, although the three-way interaction was not significant. Conclusion Positive emotion may buffer the relationship between trait-level stress reactivity and negative emotion across the cognitive performance range, although this moderating effect appears weaker at lower cognitive performance. Findings for cognitive decline were less conclusive, as a subgroup-specific association among participants with greater decline was not confirmed when cognitive decline was analyzed as a continuous moderator.
Purpose We compared objective measures of cardiometabolic health (CMH) between women who identify as lesbian/gay or bisexual (LGB) and women who identify as heterosexual. In addition, we aimed to test whether group differences in stress reactivity partially explained disparities in CMH health. Methods Participants from a longitudinal study were identified for enrollment in 2017. The LGB group self-identified as LGB in 2017 (n = 239), and the heterosexual group identified as straight or heterosexual in each year that sexual identity was asked (study years 2010–2017) (n = 160). CMH was assessed via measurements and biomarkers, and stress reactivity via heart rate variability and cortisol levels during a social stress test. Participants also provided self-reports of stress and health. We tested group differences using sexual identity at Study Year 17, at the time of the visit, and as a proportion of years identifying as LGB. Results Group differences were tested using t-tests for continuous measures, logistic regression for dichotomous measures, and repeated-measures ANOVA for change over time. There were no significant differences in measures of CMH or stress reactivity by sexual identity group. LGB participants had worse self-reported health and higher levels of stress compared to heterosexual participants. Conclusion We discuss several frameworks for interpreting the present results of no differences in objective markers of health in the context of the existing literature, including developmental, socio-political, and methodological frameworks, and suggest directions for research to link the previous research with the results of the current study.
هدف: ما شاخصهای عینی سلامت قلبیمتابولیک (CMH) را میان زنانی که خود را به عنوان لGB (همجنسگرا/دوجنسگرا) و زنانی که خود را به عنوان دگرجنسگرا معرفی میکنند، مقایسه کردیم. علاوه بر این، هدف ما آزمون این بود که آیا تفاوتهای گروهی در واکنشپذیری به استرس تا حدی میتواند نابرابریهای سلامت CMH را توضیح دهد یا خیر. روشها: شرکتکنندگان از یک مطالعه طولی برای ثبتنام در سال ۲۰۱۷ شناسایی شدند. گروه LGB در سال ۲۰۱۷ خود را به عنوان LGB معرفی کردند (n = 239) و گروه دگرجنسگرا در هر سالی که هویت جنسی پرسیده شد (سالهای مطالعه ۲۰۱۰ تا ۲۰۱۷) خود را به عنوان دگرجنسگرا معرفی کردند (n = 160). سلامت CMH از طریق اندازهگیریها و نشانگرهای زیستی ارزیابی شد و واکنشپذیری به استرس از طریق تغییرپذیری ضربان قلب و سطوح کورتیزول در طول آزمون استرس اجتماعی سنجیده شد. شرکتکنندگان همچنین گزارشهای خوداظهاری از استرس و سلامت ارائه دادند. تفاوتهای گروهی با استفاده از هویت جنسی در سال هفدهم مطالعه، در زمان مراجعه و به عنوان نسبت سالهایی که به عنوان LGB معرفی شدهاند، آزمون شد. نتایج: تفاوتهای گروهی با استفاده از آزمون t برای شاخصهای پیوسته، رگرسیون لجستیک برای شاخصهای دووجهی و ANOVA با اندازهگیریهای مکرر برای تغییرات در طول زمان آزمون شد. تفاوت معناداری در شاخصهای سلامت CMH یا واکنشپذیری به استرس بر اساس گروه هویت جنسی مشاهده نشد. شرکتکنندگان LGB سلامت خوداظهاری ضعیفتر و سطوح استرس بالاتری نسبت به شرکتکنندگان دگرجنسگرا داشتند. نتیجهگیری: ما چندین چارچوب برای تفسیر نتایج حاضر مبنی بر عدم تفاوت در شاخصهای عینی سلامت در زمینه ادبیات موجود، از جمله چارچوبهای رشدی، اجتماعی-سیاسی و روششناختی را مورد بحث قرار میدهیم و جهتگیریهایی برای پژوهش به منظور پیوند پژوهشهای پیشین با نتایج مطالعه حاضر پیشنهاد میکنیم.