Hsing-Yi Chang

Impact of mental health and caregiver burden on family caregivers' physical health.

Abstract Caregivers providing care to chronically ill family members at home are potentially at risk for caregiver burden and declining physical and psychological health. This study aims to understand how family caregivers’ mental health and caregiver burden affects physical health simultaneously, controlling for factors such as age, education level, caring hours per day, and emotional, functional, and physical support systems used by caregivers. We recruited 388 caregivers from Kaohsiung and Pingtong region in Taiwan. Caregivers had to be 18 years or older and spend most of their time taking care of an ill family member at home. Mental health was assessed by the 12-item Chinese Health Questionnaire (CHQ-12) and burden was measured using a modified scale for caregivers burden. Health status was assessed by self-perceived health (SPH), illness symptoms and the number of diagnosed chronic diseases. A high number of hours per day of caregiving was associated with low emotional support and SPH, poor mental health and high burden. Higher emotional support was associated with better mental health and fewer illness symptoms. Higher physical support was associated with poorer mental health, higher burden, a greater number of illness symptoms and chronic diseases, and a lower SPH score. Hours per day of caregiving, and use of emotional, functional, and physical support were associated with mental health, and the hours per day of caregiving and use of physical support were predictors of burden. Mental health and burden were significantly associated with caregivers’ health problems simultaneously. Our results show the important influence of mental health on caregivers’ physical health. Interventions for caregivers need to target health in a holistic way.

Social support and caregiving circumstances as predictors of caregiver burden in Taiwan

Previous research has failed to consider the importance of caregiving circumstances and their impact on social support and caregiver burden. Hence, this study aimed to investigate the association between perceived and received social support and caregiver burden. This cross-sectional study was carried out on 301 family caregivers. Data was collected using structured questionnaires which included a Social Support Scale, Family APGAR (adaptation, partnership, growth, affection, resolve), and Caregiver Burden Scale. Findings showed that the caregiver burden was best predicted by two perceived and one received social support variables. Caregiver burden was likely to be higher when the caregivers had lower levels of family function and social support. Perceived social support was better at predicting caregiver burden than received social support. Our study indicates that family function has an important influence on caregiver burden. Further studies on family based interventions are needed to determine approaches for effectively reducing caregiver burden. The role of perceived social support in the health of caregivers should be further investigated as a possible protective determinant in the caring process.

Association between Insulin Resistance and Development of Microalbuminuria in Type 2 Diabetes: A Prospective Cohort Study.

OBJECTIVE An association between insulin resistance and microalbuminuria in type 2 diabetes has often been found in cross-sectional studies. We aimed to reassess this relationship in a prospective Taiwanese cohort of type 2 diabetic subjects. RESEARCH DESIGN AND METHODS We enrolled 738 normoalbuminuric type 2 diabetic subjects, aged 56.6 ± 9.0 years, between 2003 and 2005 and followed them through the end of 2009. Average follow-up time was 5.2 ± 0.8 years. We used urine albumin-to-creatinine ratio to define microalbuminuria and the homeostasis model assessment of insulin resistance (HOMA-IR) to assess insulin resistance. The incidence rate ratio and Cox proportional hazards model were used to evaluate the association between HOMA-IR and development of microalbuminuria. RESULTS We found incidences of microalbuminuria of 64.8, 83.5, 93.3, and 99.0 per 1,000 person-years for the lowest to highest quartiles of HOMA-IR. Compared with those in the lowest quartile of HOMA-IR, the incidence rate ratios for those in the 2nd, 3rd, and highest quartiles were 1.28 (95% CI 0.88–1.87), 1.44 (0.99–2.08), and 1.52 (1.06–2.20), respectively (trend test: P < 0.001). By comparison with those in the lowest quartile, the adjusted hazard ratios were 1.37 (0.93–2.02), 1.66 (1.12–2.47), and 1.76 (1.20–2.59) for those in the 2nd, 3rd, and highest HOMA-IR quartiles, respectively. CONCLUSIONS According to the dose-response effects of HOMA-IR shown in this prospective study, we conclude that insulin resistance could significantly predict development of microalbuminuria in type 2 diabetic patients.

Poverty Increases Type 2 Diabetes Incidence and Inequality of Care Despite Universal Health Coverage

OBJECTIVE The discrepancy of diabetes incidence and care between socioeconomic statuses has seldom been studied concurrently in nations with universal health coverage. We aimed to delineate whether income disparity is associated with diabetes incidence and inequality of care under a national health insurance (NHI) program in Asia. RESEARCH DESIGN AND METHODS From the Taiwan NHI database in 2000, a representative cohort aged ≥20 years and free of diabetes (n = 600,662) were followed up until 2005. We regarded individuals exempt from paying the NHI premium as being poor. Adjusted hazard ratios (HRs) were used to discover any excess risk of diabetes in the poor population. The indicators used to evaluate quality of diabetes care included the proportion of diabetic patients identified through hospitalization, visits to diabetes clinics, and completion of recommended diabetes tests. RESULTS The incidence of type 2 diabetes in the poor population was 20.4 per 1,000 person-years (HR, 1.5; 95% CI, 1.3–1.7). Compared with their middle-income counterparts, the adjusted odds ratio (OR) for the poor population incidentally identified as having diabetes through hospitalization was 2.2 (P < 0.001). Poor persons with diabetes were less likely to visit any diabetes clinic (OR, 0.4; P < 0.001). The ORs for the poor population with diabetes to receive tests for glycated hemoglobin, low-density lipoprotein cholesterol, triglycerides, and retinopathy were 0.6 (0.4–0.9), 0.4 (0.2–0.7), 0.5 (0.4–0.8), and 0.4 (0.2–0.9), respectively. CONCLUSIONS Poverty is associated not only with higher diabetes incidence but also with inequality of diabetes care in a northeast Asian population, despite universal health coverage.

Insurance covered and non-covered complementary and alternative medicine utilisation among adults in Taiwan

Complementary and alternative medicine (CAM) has been characterized by prevalence, cost, and patterns of use. Factors determining its utilization have also been analyzed, either generally or for specific diseases, but few studies have considered the determinants of its frequency of use. Taiwans pluralistic health care system and comprehensive insurance program covering Western medicine and traditional Chinese medicine (TCM) provide an interesting case to explore what forms of CAM people use, why and how often they use them. By using Taiwans 2001 National Health Interview Survey and linking it with National Health Insurance (NHI) claims data, this study aims to investigate the socio-demographic, economic, behavioral and health determinants of use and frequency of use for both non-covered and covered CAM in Taiwan. The former consists of services practiced by non-regulated or non-NHI contracted practitioners and the latter includes those TCM covered by NHI. Our study showed that the determinants of using non-covered and covered CAM differ with respect to socio-demographic and behavioral factors, and health needs. Our evidence suggests that future CAM research must delineate between use and frequency of use to better understand the underlying factors contributing to initiation and continuity of CAM use.

Increased risk of affective disorders in type 2 diabetes is minimized by sulfonylurea and metformin combination: a population-based cohort study

BackgroundTo confirm whether type 2 diabetes (T2DM) is an affective disorder (AD) precursor, and to establish possible effects of oral anti-hyperglycemic agents (OAAs).MethodsA representative cohort of 800,000 subjects was obtained from the Taiwanese National Health Insurance database on 1 January 2000. Those with consistent data (n = 762,753) were followed up between 1 January 1996 and 31 December 2007. Over this period, we assessed the presence (n = 62,988) or absence (n = 699,795) of T2DM, and whether any OAA was used (n = 40,232) or not (n = 22,756). To compare the risk of AD by diabetic status, those with T2DM were matched for birth date and gender with those without T2DM. To assess the effect of OAAs, we considered those 50 years and over. Matched AD-free patients with T2DM on OAAs were compared with those without OAAs, for age, gender, locality, health service, Charlson Comorbidity Index. and diabetes diagnosis date to avoid immortal time bias. AD incidence densities, hazard ratios (HR) and 95% confidence intervals (CIs) were calculated.ResultsCompared with diabetes-free subjects, the HR (95% CI) for AD was 2.62 (2.31 to 2.98) for patients with T2DM who were not on OAAs, and 1.08 (0.99 to 1.18) for those who were on OAAs. The AD incidence density decreased from 91.1 to 39.4 per 10,000 person-years for patients on the combination of metformin and sulfonylurea. The HR (95% CI) for AD was 0.92 (0.59 to 1.45) for those on metformin alone, 1.08 (0.84 to 1.38) for those on sulfonylurea alone, and 0.40 (0.32 to 0.50) for the combined treatment, and the decrease was not related to sequence or insulin usage. Similar patterns were seen for incident AD exclusion for up to 3 years, although more so for bipolar than unipolar.ConclusionsThe incident AD risk is increased by 2.6-fold in T2DM, and the combination of sulfonylurea and metformin minimizes this risk.

The incidence of experimental smoking in school children: an 8-year follow-up of the child and adolescent behaviors in long-term evolution (CABLE) study

BackgroundStudies have established that most regular adult smokers become addicted in their adolescent years. We investigated the incidence of and risk factors associated with initial experimental smoking among a group of school children who were followed for 8 years.MethodsWe used cohort data collected as part of the Child and Adolescent Behaviors in Long-term Evolution (CABLE) study, which selected nine elementary schools each from an urban area (Taipei City) and a rural area (Hsingchu county) in northern Taiwan. From 2002 to 2008, children were asked annually whether they had smoked in the previous year. An accelerated lifetime model with Weibull distribution was used to examine the factors associated with experimental smoking.ResultsIn 2001, 2686 4th-graders participated in the study. For each year from 2002 to 2008, their incidences of trial smoking were 3.1%, 4.0%, 2.8%, 6.0%, 5.3%, 5.0% and 6.0%, respectively. There was an increase from 7th to 8th grade (6.0%). Children who were males, lived in rural areas, came from single-parent families, had parents who smoked, and had peers who smoked were more likely to try smoking earlier. The influence of parents and peers on experimental smoking demonstrated gradient effects.ConclusionsThis study used a cohort to examine incidence and multiple influences, including individual factors, familial factors, and community factors, on experimental smoking in adolescents. The findings fit the social ecological model, highlighting the influences of family and friends. School and community attachment were associated with experimental smoking in teenagers.

Age- and gender-specific population attributable risks of metabolic disorders on all-cause and cardiovascular mortality in Taiwan

BackgroundThe extent of attributable risks of metabolic syndrome (MetS) and its components on mortality remains unclear, especially with respect to age and gender. We aimed to assess the age- and gender-specific population attributable risks (PARs) for cardiovascular disease (CVD)-related mortality and all-cause mortality for public health planning.MethodsA total of 2,092 men and 2,197 women 30 years of age and older, who were included in the 2002 Taiwan Survey of Hypertension, Hyperglycemia, and Hyperlipidemia (TwSHHH), were linked to national death certificates acquired through December 31, 2009. Cox proportional hazard models were used to calculate adjusted hazard ratios and PARs for mortality, with a median follow-up of 7.7 years.ResultsThe respective PAR percentages of MetS for all-cause and CVD-related mortality were 11.6 and 39.2 in men, respectively, and 18.6 and 44.4 in women, respectively. Central obesity had the highest PAR for CVD mortality in women (57.5%), whereas arterial hypertension had the highest PAR in men (57.5%). For all-cause mortality, younger men and post-menopausal women had higher PARs related to Mets and its components; for CVD mortality, post-menopausal women had higher overall PARs than their pre-menopausal counterparts.ConclusionsMetS has a limited application to the PAR for all-cause mortality, especially in men; its PAR for CVD mortality is more evident. For CVD mortality, MetS components have higher PARs than MetS itself, especially hypertension in men and waist circumference in post-menopausal women. In addition, PARs for diabetes mellitus and low HDL-cholesterol may exceed 20%. We suggest differential control of risk factors in different subpopulation as a strategy to prevent CVD-related mortality.

Do centrally obese Chinese with normal BMI have increased risk of metabolic disorders

BACKGROUND:Body mass index (BMI) and waist circumference are highly correlated. One or the other predicts the metabolic syndromes better, depending on characteristic of the population studied, such as age, gender, and ethnicity. We examined the impact of isolated central obesity, isolated BMI elevation, and the combined type of obesity on metabolic disorders, in order to shed lights on the strategy of obesity screening.METHODS:The study subjects were Chinese aged 20 or above residing in Taiwan. Their data were derived from two large-scale studies: the Nutrition and Health Survey in Taiwan (NAHSIT 1993–1996) and the Cardiovascular Disease Risk Factor Two-township Study (CVDFACTS, 1994–1997). In evaluating the relations between obesity and health risks, the cut-points of BMI (≥24 kg/m2 for overweight) and waist circumference (≥80 cm for women and ≥90 cm for men) recommended by Department of Health in Taiwan for Taiwanese people were used to define various types of obesity.RESULTS:We found that there was a small but nontrivial proportion (1.7% for men and 4.0% for women) of Taiwanese people for whom BMI was in the normal range but their waist circumferences were above normal. These people were at a higher risk of developing metabolic syndromes than those with isolated BMI elevation. Their risks were close to that of the combined type.CONCLUSIONS:In order to screen out high-risk obese individuals, isolated centrally obese subjects should not be overlooked. Therefore, we recommend to assess waist circumference in parallel to, not just sequential to the measurement of BMI in Chinese.

Joint predictability of health related quality of life and leisure time physical activity on mortality risk in people with diabetes

BackgroundReduced health related quality of life (HRQOL) has been associated with increased mortality in individuals with diabetes. In contrast, increased leisure time physical activity (LTPA) has been associated with reduced mortality. The aim of this study was to investigate the combined relationship of HRQOL and LTPA on mortality and whether high levels of LTPA are associated with reduced risk of mortality in adults with diabetes and inferior HRQOL.MethodsWe analyzed data from a national sample of adults (18 years or older) with self-reported physician-diagnosed diabetes, who participated in the 2001 National Health Interview Survey in Taiwan (N = 797). A total of 701 participants had complete Short Form 36 (SF-36) and LTPA data and were followed from 2002 to 2008. Participants were divided into 3 groups based on their LTPA: (1) a regularly active group who reported 150 or more min/week of moderate-intensity activity; (2) an intermediately active group who reported engaging in LTPA but did not meet the criterion for the “regular” category; and (3) an inactive group who reported no LTPA. The physical component summary (PCS) and mental component summary (MCS) scores were dichotomised at the median (high vs. low) (PCS = 45.11; MCS = 47.91). Cox proportional-hazards models were used to investigate associations between baseline characteristics and mortality.ResultsAfter 4,570 person-years of follow-up, 121 deaths were recorded and the crude mortality rate was 26.5 per 1,000 person-years. Both PCS scores and LTPA were significant predictors of mortality, whereas no significant relationship was observed between MCS and mortality. After adjustment for other factors, participants with low PCS who reported no LTPA had a hazard ratio (HR) for mortality of 4.49 (95% CI = [2.15-9.36]). However, participants with low PCS who were active (including intermediate and regular LTPA) had a HR for mortality of 1.36 (95% CI = [0.64-2.92]).ConclusionsOur results show a significantly increased mortality risk of diabetes associated with reduced HRQOL in individuals who report no LTPA. Engaging in LTPA may be associated with improved survival in participants with diabetes with poor self-rated physical health status.