Personal and Social-Built Environmental Factors of Glucose Variability Among Multiethnic Groups of Adults With Type 2 Diabetes: Research Protocol Using Ecological Momentary Assessment, Continuous Glucose Monitoring, and Actigraphy.

Glucose variability (GV)-the degree of fluctuation in glucose levels over a certain period of time-is emerging as an important parameter of dynamic glycemic control. Repeated glycemic oscillations have been reported to be the link to diabetes complications. This prospective observational study aims to: (1) identify multilevel risk factors (personal and social-built environmental factors) associated with high GV; (2) identify "within-person predictors" of high GV leveraging the intra-person data to inform future personalized diabetes interventions; and (3) examine which lifestyle factors either mediate or moderate the relationship between emotional well-being and GV among diverse adults with type 2 diabetes (T2D). We will recruit 200 adults with T2D from the community. All participants will complete baseline surveys assessing demographics, lifestyle, social-built environmental, and clinical factors. Real-time dynamic glucose levels will be measured using continuous glucose monitoring (CGM). Sleep, physical activity, diet/eating, and emotional well-being will be measured with an actigraphy device and a real-time self-report tool (ecological momentary assessment [EMA]) across 14 days. Two 24-h dietary recall data will be collected by online video calls. Generalized linear models, multilevel models, and structural equation models will be developed to achieve the study aims. The findings from the study will identify high-risk groups of high GV who would benefit from CGM to improve diabetes outcomes and inform the future development of personalized just-in-time interventions targeting lifestyle behaviors with an increased understanding of GV and by supporting healthcare providers' clinical decisions.

Self-Management and Glycemic Targets in Adult Haitian Immigrants With Type 2 Diabetes: Research Protocol.

BACKGROUND: Type 2 diabetes (T2D) is a chronic condition affecting more than 34.2 million U.S. adults, and people of African descent have a disproportionate burden. Haitian immigrants' unique cultural and biological factors put them at elevated risk for T2D-related complications. Despite prior research highlighting the success of multimethod approaches to T2D self-management behaviors on glycemic targets, a dearth of studies have used these methods to improve diabetes self-management in this marginalized population. OBJECTIVES: This article describes a repeated-measures design protocol of a going study about self-management behaviors among adult Haitian immigrants with T2D and characterizing their barriers to T2D self-management. METHODS: We will enroll 100 Haitian immigrants aged 18-64 years who have lived with T2D for at least 1 year. Using multiple recruitment methods and Research Electronic Data Capture, subjective and objective data on T2D self-management practices, glucose variability via continuous glucose monitor, and a comprehensive view of physical activity via actigraphy are collected. RESULTS: Data analysis will follow a two-part approach mirroring the two primary study objectives. DISCUSSION: Findings from the study will guide the development and testing of a culturally tailored diabetes self-management education program that will contribute essential information about best practices for this population and break barriers that may impede research on unique individuals and subsequent effective self-management.

A middle range theory of self- and family management of chronic illness.

BACKGROUND: The Self- and Family Management Framework was created in 2006 to help structure self- and family management science. Based on a series of reviews and syntheses of emerging research and critical evaluation, we developed the Framework into a robust nursing theory. PURPOSE: In this article, we reintroduce the Self- and Family Management Framework as the Middle Range Theory of Self- and Family Management of Chronic Illness. METHODS: We review steps in the development and updating of the Framework, share rationale for advancement to a middle range theory, explicate components of the newly designed model, and propose future directions. DISCUSSION AND CONCLUSION: It is our hope that this middle range theory will guide researchers and clinicians more comprehensively in supporting patients and families managing chronic illness, which will in turn inform continued theory development.

Use of the Self- and Family Management Framework in quantitative studies.

BACKGROUND: The Self- and Family Management Framework (SFMF) identifies factors and outcomes of patient and family management of chronic illness. In a previous citation analysis, we reported the frequency and nature of use of the SFMF. PURPOSE: We conducted a sub-analysis of quantitative articles in the citation analysis to examine testing of relationships depicted in the SFMF. METHODS: We analyzed study purposes, independent and dependent variables, study implications, and text that referred to the SFMF in 40 articles. FINDINGS: The SFMF has been used largely to explore factors affecting SFM behaviors, focusing on patient versus family self-management. Independent variables included all categories of facilitators/barriers specified in the SFMF. Dependent variables included all SFMF components (Facilitators/Barriers, Processes, Proximal and Distal Outcomes). Racial/ethnic diversity was limited among study participants. Study implications pertained mostly to psychosocial outcomes. Most studies referred to the SFMF generally. DISCUSSION: Findings will contribute to revision of the SFMF.

Expect the unexpected: Adolescent and pre-teens' experience of diabetes technology self-management.

OBJECTIVE: Only 17% of adolescents with type 1 diabetes (T1D) are currently meeting their glycemic targets despite advances in diabetes technologies. Self-management behaviors and challenges specific to use of diabetes technologies are insufficiently studied in adolescents. We aimed to describe the experience of diabetes technology self-management, including facilitators and barriers, among preteens/adolescents with low and high A1C. RESEARCH DESIGN AND METHODS: Youth (10-18 years of age) with T1D who use insulin pump therapy were recruited from the larger quantitative cohort of a mixed methods study for participation in semi-structured qualitative interviews. Maximum variability sampling was used to recruit youth with A1C <7.5% (n = 5) and A1C >9% (n = 5). Participants' personal insulin pump and continuous glucose monitoring data were downloaded and served as a visual reference. Interviews were analyzed using a qualitative descriptive approach. RESULTS: Participants were 50% female with a median age of 14.9 years and 80% used CGM. The sample was predominantly white (90.0%). Analysis produced four major themes, Bad Day, Expect the Unexpected, Nighttime Dependence, and Unpredictability, It's Really a Team and interconnecting subthemes. Youth characterized ''Bad Days'' as those requiring increased diabetes focus and self-management effort. The unpredictability (''Expect the Unexpected'') of glucose outcomes despite attention to self-management behaviors was considerable frustration. CONCLUSIONS: Diabetes devices such as insulin pumps are complex machines that rely heavily on individual proficiency, surveillance, and self-management behaviors to achieve clinical benefit. Our findings highlight the dynamic nature of self-management and the multitude of factors that feed youths' self-management behaviors.

Factors associated with diabetes distress among adolescents with type 1 diabetes.

AIMS: To describe the specific domains of diabetes distress and factors associated with these domains. BACKGROUND: Diabetes distress is a common problem but not well recognised in adolescents by healthcare providers or adolescents themselves. There is insufficient evidence on how specific domains of diabetes distress exist in adolescents, making it challenging to select precise components to alleviate diabetes stress. DESIGN: A quantitative, descriptive and cross-sectional study. METHODS: Data were collected on socio-demographic and clinical characteristics, diabetes distress, perceived stress, self-efficacy and diabetes self-management using established questionnaires. Multivariate linear regression was conducted to examine the associations between specific factors and four domains in diabetes distress. STROBE checklist was used as the guideline for this study. RESULTS: A total of 100 adolescents with type 1 diabetes aged 12 to 18 years participated in this study. Adolescents experienced the highest levels of distress in the regimen-related distress [2.41 (SD =0.82)] and physician-related distress [2.40 (SD =0.80)] domains. Older age, female gender, more diabetes problem-solving and higher levels of perceived stress were associated with higher regimen-related distress (ß = 0.21 ~ 0.45, p < 0.05). Older age, female gender, a lower degree of endorsement of relevant diabetes-related goals and higher levels of perceived stress were associated with higher physician-related distress (ß = -0.29 ~ 0.34, p < 0.05). CONCLUSIONS: Diabetes distress was reported more on regimen-related and physician-related domains among adolescents with type 1 diabetes in China, associating with older age, female, increased perceived stress and poor diabetes-related problem-solving. RELEVANCE TO CLINICAL PRACTICE: Nurses need to screen the specific domains of diabetes distress among adolescents with type 1 diabetes, especially for the older adolescents and girls. This study highlighted the importance of incorporating diabetes-related problem-solving support and stress management strategies into diabetes management for adolescents with type 1 diabetes, which could help relieve diabetes distress.

Use of the self- and family management framework and implications for further development.

BACKGROUND: The Self- and Family Management Framework (SFMF) was created in 2006 and revised in 2015 to guide research on self- and family management of chronic conditions. There has been no review of use of the SFMF. PURPOSE: We reviewed articles citing the SFMF to identify the frequency and nature of use. METHOD: We conducted a citation analysis, searching Web of Science, Scopus, and Google Scholar databases and extracted key data from identified articles. FINDINGS: Of 126 articles, 84(66%) cited the 2006 SFMF, 37(29%) cited the 2015 SFMF, and 6(5%) cited both. The SFMF was used most to inform study design. Users noted strengths (e.g., considers family context) and limitations (e.g., non-specification of patient- family caregiver synergies) of the framework. DISCUSSION: The SFMF has been used broadly to guide research on self- and family management of chronic conditions. Findings will inform development of a third version of the SFMF.

Parent-Child Relationship Quality as a Mediator of the Association between Perceived Stress and Diabetes Self-Management in Adolescents With Type 1 Diabetes.

Diabetes self-management is suboptimal in adolescents with type 1 diabetes (T1D), including those in China. The aim of the study was to investigate the impact of parent-child relationship quality on diabetes self-management. Data were collected by a self-report survey among 122 Chinese adolescents from April to July 2017. The data were analyzed using a one-way analysis of variance, descriptive analyses, correlation analyses, and mediation analyses. The mean age was 13.8 (range, 10-18) years, and the mean diabetes duration was 4.1 (±3.1) years. About half of the adolescents with T1D experienced high levels of perceived stress. Parent-child relationship quality mediated the associations between perceived stress and collaboration with parents, diabetes care activities, and diabetes communication on aspects of diabetes self-management (ps < 0.05). To reduce the negative impacts of perceived stress on diabetes self-management in this population, parent-child relationship quality should be considered an important element of family-based interventions and clinical practice.

Daily variations in sleep and glucose in adolescents with type 1 diabetes.

OBJECTIVE: We used multilevel models (MLMs) to determine person (between-persons) and day level (within-person) associations between glucose variability indices and sleep characteristics in adolescents with type 1 diabetes (T1D). METHODS: Adolescents with T1D (Mean age 13.4 ± 1.8 years; 37.8% male; mean HbA1c 8.2 ± 1.2%, 66 mmol/mol) monitored their sleep and glucose patterns concurrently for 3-7 days with a wrist actigraph on their non-dominant wrist and a continuous glucose monitor (CGM) (their own or a provided, blinded CGM). Glucose variability indices included J index, coefficient of variation, low and high blood glucose risk indices (LBGI and HBGI), time in range, and sleep characteristics, including bedtime, wake time, total sleep time, sleep efficiency, wake after sleep onset, awakenings, and sleep fragmentation index. RESULTS: More overall glucose variability was associated within person, more sleep disruptions (more awakenings and more fragmentation) or poorer sleep in our study (earlier wake time or longer wake after sleep onset). Also, more time spent in hypoglycemia <70 mg/dL and a higher LBGI was associated within person with earlier wake time indicating poorer sleep. However, a lower LBGI was associated with a later between-persons wake time. CONCLUSIONS: Monitoring over a longer period of time in subsequent studies would allow researchers to determine the within person association between habitual short sleep duration and glucose variability. Providers should regularly assess sleep habits in adolescents as a way to improve glycemic control. Targeting a euglycemic range overnight is also important to promote better sleep and to decrease sleep disruptions.

Self-management among pre-teen and adolescent diabetes device users.

OBJECTIVE: Despite increased diabetes device use, few adolescents with type 1 diabetes (T1D) meet glycemic targets. We examine associations between utilization of insulin pumps and continuous glucose monitoring (CGM) and glycemic control. RESEARCH DESIGN AND METHODS: This prospective cohort study included 80 youths (10-18 years of age) with T1D. Multiple linear regression and linear mixed models (LMM) were used to estimate the effects of device self-management on HbA1c and daily time in range (70-180 mg/dL), respectively. RESULTS: Every blood glucose (BG) input/day was associated with a 0.2% decrease in HbA1c (95% CI: -0.297, -0.013), each bolus/day was associated with a 0.2% decrease (-0.327, -0.057), and use of CGM was associated with a 0.5% decrease (-1.00, -0.075). Among CGM users (n = 45) every 10% increase in CGM use was associated with a 0.3% decrease in HbA1c (-0.390, -0.180). In LMM accounting for within subject and between subject variability, there was a negative association between BG input/day frequency (coefficient = -1.880, [-2.640, -1.117]) and time in range. Residual random effects for CGM users were large showing time in range varied between youth with a SD of 15.0% (3 hours and 36 minutes) (SE 2.029, [11.484, 19.530]). Time in range varied significantly from day-to-day with SD of 18.6% (4 hours and 40 minutes) (SE0.455, [17.690, 19.473]). CONCLUSIONS: Device self-management behaviors among youth are significantly associated with both HbA1c and time in range. Our findings showing an association between reduced time in range and increased self-management behaviors is novel and deserves further investigation.

Perceptions and experiences of living with type 1 diabetes among Latino adolescents and parents with limited English proficiency.

We explored perceptions and experiences of living with type 1 diabetes mellitus (T1DM) among U.S. Latino adolescents (age 12-19 years) with T1DM and parents with limited English proficiency. We used a qualitative descriptive approach with semi-structured interviews of adolescents together with their parents. Interview data were reviewed, coded, and combined into themes about participant experiences with T1DM. Twenty-four adolescents (mean age: 15.4 years) and 23 parents participated. Analysis resulted in three themes: (a) Understanding and adapting to T1DM (i.e., initial fear and misunderstandings of T1DM; adolescents' reflections on living with a chronic health condition); (b) Coming to terms with social and environmental influences on T1DM self-management (i.e., T1DM as disruptive to school and social activities; dealing with stigma and judgments related to diabetes); and, (c) Integrating T1DM self-management expectations with components of Latino cultures (i.e., orientation toward family well-being; parent concerns about cultural preferences that influence food choices, positive influence of spirituality and religiousness; parental views of their current health care in comparison to that available in their place of birth). Adolescents and their parents reported experiences that are universal to adolescents with T1DM in addition to challenges that are unique to Latinos. Efforts aimed at improving T1DM self-management during adolescence with this population need to be tailored to meet the unique social and cultural contexts and delivered in a culturally and linguistically congruent manner.

Sleep, self-management, neurocognitive function, and glycemia in emerging adults with Type 1 diabetes mellitus: A research protocol.

Type 1 Diabetes (T1D) affects 1.6 million Americans, and only 14% of emerging adults ages 18-25 years achieve targets for glycemic control (A1C < 7.0%). Sleep deficiency, including habitual short sleep duration (<6.5 hr total sleep time and high within-person variability in total sleep time), is associated with poorer glycemic control. Emerging adults with T1D have a more pronounced sleep extension on weekends compared with matched controls, consistent with sleep deficiency; however, associations among sleep variability and glycemic control have not been explored in this population. Sleep deficiency may affect the complex higher-order neurocognitive functioning needed for successful diabetes self-management (DSM). We report the protocol for an ongoing study designed to characterize sleep and the associations among sleep deficiency, neurocognitive function, DSM, diabetes quality of life, and glycemia among a sample of 40 emerging adults with T1D. We monitor sleep via wrist-worn actigraphy and glucose via continuous glucose monitoring concurrently over 14 days. We are collecting data on self-report and objective sleep, a 10-min psychomotor vigilance test on a PVT-192 device, a 3-min Trail Making Test on paper, and questionnaires, including twice-daily Pittsburgh sleep diaries using Research Electronic Data Capture (REDCap)TM . Results from this study will be used to support the development and testing of the efficacy of a tailored sleep self-management intervention that may improve total sleep time, sleep variability, neurocognitive function, DSM, glycemic control, and glucose variability among emerging adults with T1D.

Feasibility and safety of a group physical activity program for youth with type 1 diabetes.

BACKGROUND/OBJECTIVE: Many adolescents with type 1 diabetes do not achieve 60 minutes of daily moderate-to-vigorous intensity physical activity (MVPA). Recognizing the importance of peer influence during adolescence, we evaluated the feasibility and safety of a group MVPA intervention for this population. METHODS: Eighteen adolescents with type 1 diabetes (age 14.1 ± 2 .3 years, female 67%, black or Latino 67%, median body mass index 92%'ile, A1c 79.9 ± 25.1 mmol/mol, 9.5 ± 2.3%). Intervention sessions (35 minutes MVPA and 45 minutes discussion) occurred 1×/week for 12 weeks. Feasibility and safety metrics were enrollment, completion of intervention and assessments, cost, and hypoglycemia rates. Participants completed MVPA (accelerometry), and exploratory nutritional, psychosocial, clinical, and fitness variable assessments at baseline, 3 months, and 7 months. Hedges' effect sizes were calculated. RESULTS: Enrollment was 16%, and intervention completion was 56%. Assessment completion at 7 months was 67% for MVPA, nutrition, and fitness, 83% for psychosocial assessments, and 94% for clinical assessments. Cost was $1241 per completing participant. One episode of mild hypoglycemia occurred during the sessions (0.6%). Self-reported daily fruit/vegetable servings (d = -0.72) and diabetes self-management behaviors decreased over time (d = -0.40). In the 10 completers, endurance run score improved (d = 0.49) from low baseline levels, while systolic blood pressure decreased (d = -0.75) and low-density lipoprotein increased (d = 0.49) but stayed within normal ranges. CONCLUSIONS: The protocol for the group MVPA intervention was safe and had some feasibility metrics meriting further investigation. MVPA levels and glycemic control remained suboptimal, suggesting the need for more intensive interventions for this population.

Diabetes Distress, Depressive Symptoms, and Cardiovascular Health in Adults With Type 1 Diabetes.

BACKGROUND: The prevalence of adults with Type 1 diabetes (T1D) is increasing, and their risk of cardiovascular disease is high. Comorbid diabetes distress and depressive symptoms may affect their cardiovascular health. OBJECTIVES: The purpose of this study was to describe the relationship between diabetes distress and depressive symptoms with cardiovascular health factors. METHODS: This was a cross-sectional survey of a sample of adults with T1D. Valid and reliable instruments were used to collect the data on sociodemographics, diabetes-related complications, psychological factors, and cardiovascular health factors. Independent-sample t tests, analysis of variance, chi-square analyses, and linear regression were used to compare the cardiovascular health factors among the three levels of diabetes distress scores and the two levels of depressive symptom scores. RESULTS: Our sample included 83 adults with a mean age of 45.2 years and a mean duration of T1D of 20 years. The majority scored low in the Diabetes Distress Scale, whereas 18% scored moderate and 18% scored high. Twenty-two percent had increased levels of depressive symptoms. There were significant correlations between diabetes distress and fear of hypoglycemia, depressive symptom scores, hemoglobin A1c, and total cholesterol. Depressive symptom scores were significantly correlated with hemoglobin A1c. Hemoglobin A1c and total cholesterol were significantly higher in those with higher levels of diabetes distress. There were no significant differences in cardiovascular health between those who scored below or above the cut point for depressive symptoms, but there was a finding toward higher mean body mass index, hemoglobin A1c, and a lower weekly step count in those who had elevated depressive symptoms. In the linear regression, only diabetes distress was significantly associated with hemoglobin A1c. DISCUSSION: This is a sample with elevated diabetes distress and depressive symptoms, both of which may affect their risk of cardiovascular disease.

Stressful Life Events in Young Adults With Type 1 Diabetes in the U.S. T1D Exchange Clinic Registry.

PURPOSE: The purpose was to test associations among stressful life events, frequency of missed insulin doses, and glycemic control in young adults with type 1 diabetes (T1D). DESIGN: The study was a cross-sectional descriptive secondary analysis. METHODS: Data from 2,921 participants (ages 18-26 years) in the U.S. T1D Exchange Clinic Registry were analyzed. Report of a stressful life event was defined as one or more positive responses on a 17-item stressful life events index and defined as a dichotomous variable (yes or no). Frequency of missed insulin doses was measured using a single self-report item and collapsed into two levels (fewer than three times a week, three or more times a week). The glycosylated hemoglobin (A1c) level recorded at the time of enrollment was used to assess glycemic control. FINDINGS: Nearly half (48.6%) of the participants reported having a stressful life event during the previous year. The most frequently reported stressful life events were problems at work or school (16.1%), serious arguments with family members or a close friend (15.2%), and financial problems in the family (13.8%). Compared to the participants not reporting stressful life events, those who reported stressful life events were more likely to be older, female, with a higher educational attainment level, and not working or unemployed. Those who reported a stressful life event were more likely than those who did not to say they typically missed insulin doses at least three times a week and less likely to say they typically missed insulin doses fewer than three times a week (p < .001 adjusted for age, sex, race or ethnicity, educational attainment level, duration of T1D diagnosis, and insulin delivery method). Mean A1c level was higher for the group who reported having a stressful life event in the past 12 months compared to the group who did not (8.7 ± 1.8% vs. 8.2 ± 1.6%; adjusted p < .001). The results of a mediation analysis suggest that the measure of frequency of missed insulin doses may be a mediator of the relationship between recent stressful life events and glycemic control (Sobel test: ab = .841, 95% confidence interval = 0.064-1.618). CONCLUSIONS: These findings suggest that, for young adults with T1D, the experience of stressful life events may increase their risk for poorer glycemic control, possibly by disrupting adherence with insulin doses. CLINICAL RELEVANCE: Further exploration of these relationships may allow for the potential for identifying those at risk and assisting them with more positive approaches to managing stressful events.

"Anxiety and Type 1 diabetes are like cousins": The experience of anxiety symptoms in youth with Type 1 diabetes.

Type 1 diabetes (T1D) is one of the most common chronic health conditions in youth in the United States, and its incidence is rising worldwide. Youth with T1D are at a high risk of psychological comorbidity, for example, anxiety, depression, and eating disorders. Psychological comorbidities, especially anxiety symptoms, have been correlated with poorer diabetes outcomes, but anxiety symptoms have not been well studied in these youth. The primary aim of this study was to describe the experience of anxiety symptoms in youth with T1D, especially as those symptoms relate to diabetes self-management tasks. We used a qualitative descriptive approach, consisting of an in-depth, semi-structured interview comprising 10 open-ended questions with follow-up probes. The analysis was guided by the principles of thematic analysis. Demographic data, Hemoglobin A1c levels, and the State-Trait Anxiety Inventory for Children survey data were also collected and analyzed. We identified four themes and seven sub-themes. Participants (n = 29, ages 10-16, 55% female) reported that T1D was an extra layer of responsibility that took time away from their ability to participate fully in other aspects of their lives. Some participants were able to integrate diabetes management into their lives, while others were not. Some participants were dependent on parents and the school nurse for diabetes management. Participants described two types of anxiety symptoms, general and diabetes-specific, and they noted that their experience of anxiety was associated with poor quality sleep, general lifestyle factors, and diabetes.

Obesity-risk behaviours and their associations with body mass index (BMI) in Korean American children.

AIMS AND OBJECTIVES: To describe obesity-risk behaviours (diet, physical activity and sedentary behaviour) and examine the relationships of the obesity-risk behaviours with body mass index (BMI) in school-aged Korean American children. BACKGROUND: Korean American children have a risk of becoming overweight or obese and developing obesity-related complications; however, there is limited research about obesity-risk behaviours in Korean American children. DESIGN: A cross-sectional study. METHODS: Obesity-risk behaviours of children were assessed with well-validated self-report questionnaires (i.e., Elementary-level School-based Nutrition Monitoring Questionnaire) from children and their mothers. Height and weight of children were measured. Data were analysed with bivariate and multivariate analyses using mixed effects models to incorporate the correlation within siblings. RESULTS: A total of 170 Korean American children (mean age 10.9 [2.0] years; 52.4% girls; mean BMI 19.3 [3.2]; 28.7% ≥85 percentiles) participated in the study. Only 38.3% of Korean American children met established recommendations of five fruits/vegetables per day; 56.5% met recommendations for more than 3 days per week of vigorous physical activity; and 40.8% met recommendations for <2 hr of recreational screen time per day. Sixty per cent and 88.8% of children met the recommendation of sleep on a weekday and weekend, respectively. Only screen time was positively associated with child BMI z-score (ß = 0.08; p < .03). CONCLUSION: Healthcare providers need to be aware of the increased rate of overweight and obesity in Korean American children and initiate clinical interventions to improve obesity-risk behaviours, especially sedentary behaviour, in Korean American children. RELEVANCE TO CLINICAL PRACTICE: Clinical assessment and management of the risk of developing overweight and obesity as well as obesity-related behaviours are important to improve obesity-related complications in overall Korean Americans.

Stress and Coping Predicts Adjustment and Glycemic Control in Adolescents with Type 1 Diabetes.

BACKGROUND: Adolescents with type 1 diabetes are at increased risk for deteriorating glycemic control, poor quality of life, and depressive symptoms. Stress and coping are related to these outcomes in adolescents with diabetes, yet few studies have examined these constructs longitudinally. PURPOSE: This study aimed to describe stress and coping in adolescents with type 1 diabetes and to examine coping strategies as predictors of adolescent adjustment (i.e., depressive symptoms, quality of life) and glycemic control. METHODS: Adolescents with type 1 diabetes completed measures of diabetes-related stress, coping, symptoms of depression, and quality of life at baseline, 6 months, and 12 months. Data on glycemic control were collected from the adolescents' medical charts. RESULTS: The adolescents' use of primary control coping (e.g., problem solving) and secondary control engagement coping (e.g., positive thinking) strategies predicted significantly fewer problems with quality of life and fewer depressive symptoms over time. In contrast, the use of disengagement coping strategies (e.g., avoidance) predicted more problems with quality of life and depressive symptoms. Coping was not a significant predictor of glycemic control. Coping mediated the effects of diabetes-related stress on depressive symptoms and quality of life. CONCLUSIONS: The ways in which adolescents with type 1 diabetes cope with diabetes-related stress predict quality of life and symptoms of depression but not glycemic control. Through the use of screening to identify adolescent's diabetes-related stress and targeted interventions to improve coping strategies, there is potential to improve outcomes.

Incorporating nonlinearity into mediation analyses.

BACKGROUND: Mediation is an important issue considered in the behavioral, medical, and social sciences. It addresses situations where the effect of a predictor variable X on an outcome variable Y is explained to some extent by an intervening, mediator variable M. Methods for addressing mediation have been available for some time. While these methods continue to undergo refinement, the relationships underlying mediation are commonly treated as linear in the outcome Y, the predictor X, and the mediator M. These relationships, however, can be nonlinear. Methods are needed for assessing when mediation relationships can be treated as linear and for estimating them when they are nonlinear. METHODS: Existing adaptive regression methods based on fractional polynomials are extended here to address nonlinearity in mediation relationships, but assuming those relationships are monotonic as would be consistent with theories about directionality of such relationships. RESULTS: Example monotonic mediation analyses are provided assessing linear and monotonic mediation of the effect of family functioning (X) on a child's adaptation (Y) to a chronic condition by the difficulty (M) for the family in managing the child's condition. Example moderated monotonic mediation and simulation analyses are also presented. CONCLUSIONS: Adaptive methods provide an effective way to incorporate possibly nonlinear monotonicity into mediation relationships.

Factors associated with school-aged children's body mass index in Korean American families.

AIMS: To examine factors associated with children's body mass index and obesity-risk behaviours in Korean American families. BACKGROUND: Limited data are available about family factors related to overweight and obesity in Korean American children. DESIGN: A cross-sectional study. METHODS: Convenient sampling was employed to recruit Korean American families in the Northeast of the United States between August 2014 and January 2015. Child, family and societal/demographic/community factors were measured with self-report questionnaires completed by mothers and children. Height and weight were measured to calculate body mass index. Data were analyzed using mixed effects models incorporating within-group correlation in siblings. RESULTS: The sample included 170 Korean American children and 137 mothers. In bivariate analyses, more child screen time, number of children in the household, greater parental underestimation of child's weight and children's participation in the school lunch program were significantly associated with higher child body mass index. In multivariate analyses that included variables showing significant bivariate relationship, no variable was associated with child body mass index. CONCLUSION: There were no child, family and societal/demographic/community factors related to child body mass index in Korean American families in the multivariate analysis, which is contrary to research in other racial/ethnic groups. In bivariate analyses, there is evidence that some factors were significantly related to child body mass index. Further research is needed to understand the unique behavioural, social and cultural features that contribute to childhood obesity in Korean American families.