Feasibility, reliability and validity of the Iranian version of the Diabetes Quality of Life Brief Clinical Inventory (IDQOL-BCI)

Relationship between diabetes health literacy, distress, burnout, social support, complications, self-care behaviors, and quality of life among patients with type 2 diabetes: a path analysis study

INTRODUCTION

Improving the quality of life (QOL) is the most important goal of early diagnosis and treatment in patients with type 2 diabetes (T2D). Numerous studies have indicated the positive effects of health literacy, social support and self-care behaviors and the negative effects of diabetes distress and burnout on the QOL of patients with T2D. Understanding these factors is crucial for people with diabetes. However, no study has investigated the simultaneous effects of these variables on QOL. In this study, our goals were to find out how these variables are related to each other, in addition, which variables play the role of mediating variables, and finally, what is the cumulative effect of these variables in predicting the QOL of patients with T2D. So, this study aimed to examine the relationship between diabetes health literacy (DHL), distress, burnout, social support, complications of diabetes, self-care behaviors, and QOL among patients with T2D by application Path analysis method.

METHODS

In this study 929 participants were entered to study by cluster sampling method and finally, data were analyzed among 820 participants. Data were gathered by self-report and with seven tools of Demographic section, DHL Scale, Diabetes distress scale, Diabetes Burnout scale, Diabetes Self-Management Questionnaire (DSMQ), Perceived social support, Diabetes Quality of Life (DQOL) Questionnaire. The software's of SPSS version 24 and AMOS version 24 were used for analysis.

RESULTS

The variables of DHL, social support, diabetes distress, and complications of diabetes predicted 38% variance in diabetes burnout (R2 = 0.38). Greatest impact on diabetes burnout was related to diabetes distress (estimate total effect = 0.539). The variables of DHL, social support, diabetes distress, complications of diabetes, and diabetes burnout predicted 24% variance in self- care behaviors (R2 = 0.24). Greatest impact on self- care behaviors was related to DHL (estimate total effect = 0.354). The variables of DHL, social support, diabetes distress, diabetes burnout, complications of diabetes, and self- care behaviors predicted 49% variance in DQOL (R2 = 0.49). Greatest impact on DQOL was related to variables of diabetes distress (estimate total effect = -0.613), DHL (estimate total effect = 0.225), diabetes burnout (estimate total effect = -0.202), complications of diabetes (estimate total effect = - 0.173), social support (estimate total effect = 0.149), and self -care (estimate total effect = 0.149), respectively.

CONCLUSION

To improve QOL in patients with T2D, health care providers must develop interventions that increase DHL of diabetic. Because DHL can decrease distress and burnout, enhance self -care skills, create supportive networks, and ultimately improve QOL in patients with type 2 diabetes.

Cross-cultural adaptation and validation of Diabetes Quality of Life Brief Clinical Inventory in Turkish patients with type 2 diabetes mellitus

PURPOSE

To translate and culturally adapt the Diabetes Quality of Life Brief Clinical Inventory (DQoL-BCI) into Turkish and assess the psychometric properties of the translated version.

METHODS

A forward-backward translation process was conducted in conformity with international guidelines. A total of 150 patients with type 2 diabetes mellitus (T2DM) completed the Turkish version of DQoL-BCI (DQoL-BCI-Tr). The factor structure, test-retest reliability, and construct validity were evaluated.

RESULTS

In the DQoL-BCI-Tr, the three-factor structure was found optimal and explained 68.7% of the variance. The DQoL-BCI-Tr showed excellent internal consistency (Cronbach's alpha = 0.90) and test-retest reliability (ICC = 0.98). Cronbach's alpha values ranged from 0.85 to 0.91 for subscales (satisfaction, worry, impact). A negative correlation was found between the total scores of the DQoL-BCI-Tr and the EuroQoL-5 dimensions (EQ-5D) indexes (r= -0.22, p < 0.01). The DQoL-BCI-Tr total score and satisfaction and worry subscale scores differentiated between groups defined by glycated hemoglobin (HbA1c>9%) and the use of insulin.

CONCLUSIONS

The study results showed that the DQoL-BCI-Tr can be served as a reliable and valid instrument to obtain information from Turkish patients with T2DM diagnosis, including satisfaction with treatment, the impact of the disease, and worry about the social/vocational issues.Implications for rehabilitationThe Turkish version of the Diabetes Quality of Life Brief Clinical Inventory (DQoL-BCI) is a valid and reliable instrument.The DQoL-BCI Questionnaire in Turkish (DQoL-BCI-Tr) is an easy and quick way to determine satisfaction with treatment, impact of disease, and worry about the social/vocational issues.The DQoL-BCI-Tr is a reliable instrument for assessing disease-specific effects, emotional loads, and satisfaction of Turkish patients with type 2 diabetes in clinical and research settings.

Effects of a theory-based training program with follow-up home visits on self-management behavior, glycemic index, and quality of life among Iranian patients with type 2 diabetes mellitus

Background

Uncontrolled diabetes is an important public health problem that endangers the quality of life of patients. Promoting self-management through well-planned training is an essential strategy to control diabetes effectively. This study aimed to examine the effects of a training program based on social cognitive theory (SCT) on self-management behavior, glycemic index, and quality of life among patients with type 2 diabetes mellitus.

Methods

This is a quasi-experimental study with a pretest–posttest design. The statistical population included 106 adults with type 2 diabetes mellitus assigned to the intervention and control groups [n₁ = n₂ = 53], who received services from two urban health centers. A multi-method, SCT-based training program consisting of six 60–80-min sessions was run, followed by 2–3 follow-up home visits [once a month for each participant] for the intervention group. The data were collected before and three months after the intervention and were analyzed in SPSS 19.

Results

Before the intervention, there was no significant difference between the two groups regarding the main variables. After the intervention, there was a significant increase in the intervention group's mean scores of knowledge, self-efficacy, social support, outcome expectations, self-regulation, self-management behavior, glycemic index, and quality of life. There were no significant changes in these constructs in the control group after the intervention. The regression analysis results indicated that social cognitive theory and self-management could explain the variance in quality of life [adjusted R-squared = 0.476].

Conclusions

The findings support the effectiveness of the multi-method, SCT-based educational intervention in improving self-management behaviors, glycemic index, and quality of life among patients with type 2 diabetes mellitus. It is suggested that the quality of type 2 diabetes care programs should be promoted. However, further research is needed to evaluate the long-term outcomes.

The effect of peer support on quality of life among type 2 diabetic patients in deprived areas in Iran: A randomized clinical trial

BACKGROUND

Quality of life (QOL) is one of the effective factors in promoting the health of diabetic patients. In recent years, the role of peer support in the optimal management of diabetes has gained increasing attention. However, contradictory results have been reported from the effectiveness of this method. This study aimed to investigate the effect of peer support on the QOL among type 2 diabetic patients in deprived areas.

MATERIALS AND METHODS

This study was a randomized clinical trial conducted on 80 patients with T2D referring to the diabetes Clinic in Aligoudarz in Iran. Participants were randomly assigned into two groups of 40 patients. Intervention group received a peer Supportive-educational program for 3 months and the control group received routine clinic care. Diabetes QOL brief clinical inventory was used to collect the data. This questionnaire was completed three times at the beginning of the study, immediately after the 3-day training, and after 3 months of peer supportive intervention. The SPSS software (v. 18.0) was used to analyze the data through the Generalized Estimating Equations.

RESULTS

There was no significant difference in mean QOL between the two groups before the intervention (P = 0.891) and immediately after the education (P = 0.076). However, after 3 months of intervention, the intervention group showed a significant improvement in mean QOL compared to those in the control group (P < 0.001).

CONCLUSION

Peer support program can improve the QOL in type 2 diabetic patients in deprived areas. Therefore, this method can be recommended to improve care and educational programs in these patients.

Saffron improves life and sleep quality, glycaemic status, lipid profile and liver function in diabetic patients: A double-blind, placebo-controlled, randomised clinical trial

BACKGROUND

Type 2 diabetes (T2D) is a metabolic disorder that is related to hyperglycaemia, hyperlipidaemia and liver dysfunction and has detrimental effects on a patient's mental health. Hence, the current study investigated the effects of saffron supplementation on dietary intake, anthropometric measures, mood, sleep quality and metabolic biomarkers in overweight/obese patients with T2D.

METHODS

In a double-blind, randomised controlled trial, 70 overweight/obese patients with T2D were randomly allocated to two groups and received 100 mg/day saffron or placebo for 8 weeks. Participants completed the Beck depression inventory-II (BDI-II), Hurlbert index of sexual desire (HISD), Pittsburgh Sleep Quality Index (PSQI) and Diabetes-specific Quality-of-Life Brief Clinical Inventory questionnaires (DQOL-BCI). Dietary intake, anthropometric measures, fasting plasma glucose (FPG), haemoglobin A1C (HbA1C), insulin, lipid profile and liver enzymes were determined at baseline and the end of the study.

RESULTS

At the end of the eighth week, saffron supplementation significantly decreased FPG, triglyceride (TG), insulin, aspartate aminotransferase (AST) and alanine aminotransferase (ALT) (P < .001). Moreover, significant improvements in BDI-II scores and total quality of life were observed in the intervention group (P < .001). The saffron group showed more significant improvements in PSQI scores than the placebo group, such that at the post-intervention analysis, only the saffron group achieved a "good" sleep band. At this relatively high dose, saffron supplementation improved glycaemic status, lipid profile and liver enzyme measures in patients with T2D while also improving sleep and overall quality of life.

CONCLUSION

Our results indicate that saffron notably reduced hyperglycaemia and hyperlipidaemia and improved liver function in patients with T2D in an 8-week randomised clinical trial. Saffron also significantly improved depression, sleep quality and overall quality of life in diabetic patients. However, further investigation is necessary to confirm whether saffron is an effective complementary therapy for T2D.

Systematic Review and Meta-Analysis on Quality of Life in Diabetic Patients in Iran

Background:

Diabetes is the fifth leading cause of death in the world, which reduces the patients' quality of life (QOL) and is considered as an important subject especially in medicine and medical community. The present study aimed at investigating the QOL of diabetic patients in Iran through meta-analysis.

Methods:

The search was conducted using relevant keywords in national and international databases including Iranmedex, SID, Magiran, IranDoc, Medlib, Science Direct, PubMed, Scopus, Cochrane, Embase, Web of Science. Questionnaires WHOQOL, SF-36, SF-20, DQOL, QOL, PedsQL, ADDQOL, D-39, DQOL-BCI, SWED-QUAL, IRDQOL, PHG-2, EQ-5D, and IDQOL-BCI were used to assess the QOL. Heterogeneity of studies was assessed using I² index. Data were analyzed using STATA version 11.

Results:

In 96 studies of 17,994 people, the mean score of QOL in diabetic patients was based on the questionnaires WHOQOL [66.55 (95% CI: 45.83, 87.26)], D-39 [129.43 (95%CI: 88.77, 170.10)], SF-36 [65.64 (95% CI: 59.82, 71.46)], SF-20 [46.50 (95% CI: 37.19, 55.81], DQOL [61.19 (95% CI: 35.73, 86.66)], QOL [117.91 (95% CI: -62.97, 298.79)], PedsQL [34.36 (95% CI: -31.49, 100.22)], ADDQOL [41.76 (95% CI: 12.01-71.50)], SWED-QUAL [59.19 (95% CI: 21.15, 97.23)], IRDQOL [105.92 (95% CI: 102.73, 109.10)], PHG-2 [61.00 (95%CI: 59.63, 62.37)], EQ-5D [0.62 (95% CI: 0.61, 0.64)], DQOL-BCI [3.40 (95% CI: 3.31, 3.49)], and IDQOL-BCI [22.63 (95% CI: -2.38, 47.64)].

Conclusions:

The QOL of diabetic patients was evaluated according to different types of questionnaires and the QOL of diabetic patients was found to be lower than normal population.

Evaluation of the effectiveness of Persian diabetes self-management education in older adults with type 2 diabetes at a diabetes outpatient clinic in Tehran: a pilot randomized control trial

Purpose

The effectiveness of diabetes self-management interventions has been more generally demonstrated in adults, but there is little evidence of diabetes self-management specific to older adults situated in Iran. The purpose of this study was to evaluate the effectiveness of Persian Diabetes Self-Management Education on self-efficacy, quality of life, self-care activity, depression and loneliness in older adults with type 2 diabetes.

Methods

In pilot randomized controlled trial, a total of 34 participants ≥60 years with type 2 diabetes were randomly assigned into intervention (n = 17) and control (n = 17) group in an outpatient diabetes clinic in Tehran. To assess the primary outcome of participant experiences, the Diabetes Management Self-efficacy Scale (DMSES) was the method of measurement. The Diabetes Quality of Life-Basic Clinical Inventory (DQoL-BCI), Patient Health Questionnaire-9 (PHQ-9), Diabetes Self-Management Education Scale (DSMES), and adult Social-Emotional Loneliness Scale Short form (SELSA-S) were used as secondary outcomes. Participants' evaluations were completed at baseline, while measurements were conducted two and four weeks after allocation, using repeated measurements of Univariate and multivariate ANOVA (adjusted for baseline values) to analyze the data.

Results

In the multivariate model, there was a significant difference between the control and intervention groups regarding reported quality of life (p = 0.04) and the medical-domain's reported self-efficacy (p = 0.02). However, there were no significant differences in the reported self-management, depression, loneliness, as well as the other domain of self-efficacy; as compared between the two groups before and after intervention.

Conclusion

The study depicts a promising impact on older adults, imparted by the pertinent program. The finding showed PDSME has a positive effect on quality of life and medical control domain of self-efficacy. This pilot study showed that the program is feasible and duly beneficial if delivered to older adults. This pilot proves appealing to begin further testing within a larger sample population.

Psychometric evaluation of undergraduate student nurses' learning perceived needs in disaster nursing: Two cross-sectional studies

BACKGROUND

Disaster nursing education is a necessity for nurses and students to improve their disaster relief competencies. Determining undergraduate student nurses' learning perceived needs for disaster nursing can help improve curricula construction. In China there is currently no valid instrument available for the evaluation of influencing factors. A disaster nursing course content system was developed using the Delphi method in 2011. However, this system was unformed and lacked psychometric evaluation.

OBJECTIVES

To adapt the disaster nursing course content system into an instrument, to evaluate its psychometric properties, and to investigate undergraduate student nurses' learning perceived needs for disaster nursing.

DESIGN, SETTINGS AND PARTICIPANTS

Two cross-sectional studies were conducted in public higher education institutions in China. In the first study, a total of 1714 undergraduate student nurses were recruited in May to October 2016; in the second study, 68 were recruited in May 2019.

METHODS

The instrument was adapted through literature review, face validity and pilot testing in preliminary studies. The construct validity and reliability of the instrument were tested using exploratory factor analysis, parallel analysis, confirmatory factor analysis, internal consistency reliability and test-retest reliability.

RESULTS

The exploratory factor analysis and parallel analysis extracted a three-factor solution comprising 19 items that accounted for 71.69% of the total variance, including discipline introduction, skills and knowledge in disaster relief, and disaster management. The fit indices indicated a good fit. The internal consistency and test-retest reliability was good, as indicated by a Cronbach's alpha of 0.89 and an intraclass correlation coefficient of 0.87.

CONCLUSION

The Learning Needs for Disaster Nursing questionnaire exhibited good psychometric properties, thereby proving itself a valuable instrument for evaluating learning perceived needs in undergraduate student nurses.

Factorial Structure and Psychometric Analysis of the Persian Version of Perceived Competence Scale for Diabetes (PCSD-P)

As a basic psychological need, the level of perceived competence could expedite the achievement of diabetes self-management goals. Because of a lack of a specific data collection tool to measure the level of self-competence among Persian-speaking patients with diabetes, this study was conducted for (1) cross-cultural adaptation and (2) psychometric assessment of the Persian version of the Perceived Competence Scale for Diabetes (PCSD-P). Standard translation/back-translation procedure was carried out to prepare a preliminary draft of the PCSD-P. Content and face validities of the early draft were checked by an expert panel including 15 scholars in the field of health education and promotion as well as nursing education with experience of working and research on diabetes. The final drafted questionnaire was completed by 177 randomly selected patients with type 2 diabetes. On the basis of the collected data, the structural validity of the contrived version was appraised using exploratory and confirmatory factor analysis (EFA, CFA). Cronbach’s alpha and intraclass correlation (ICC) coefficients were used to check the scale’s reliability and internal consistency. The estimated measures of content validity index (CVI = 0.95) and content validity ratio (CVR = 0.8) were within the acceptable recommended range. The EFA analysis results demonstrated a single factor solution according to the items’ loadings for the corresponding component. The model fit indices, that is, root mean square error approximation (RMSEA = 0.000), comparative fit index (CFI = 1), Tucker–Lewis index (TLI = 1), incremental fit index (IFI = 1), normed fit index (NFI = 0.999), and relative fit index (RFI = 0.995), confirmed the consistency of the hypothesized one-factor solution. The values of the internal consistency and reliability coefficients were also in the vicinity of an acceptable range (α = 0.892, ICC = 0.886, P = 0.001). The study findings revealed good internal validity and applicability of the PCSD-P to measure the degree of self-competence among Persian-speaking type 2 diabetes patients to manage the chronic disease. Owing to unrepresentativeness of the study sample, future cross-cultural tests of PCSD-P are recommended on diverse and broader Persian-speaking populations.

Psychometric properties of the Persian Health Care Climate Questionnaire (HCCQ-P): assessment of type 2 diabetes care supportiveness in Iran

Background: Health-care systems play a key role in responding to the growing problems of patients with type 2 diabetes by supporting their autonomy in providing routine care. The Health Care Climate Questionnaire (HCCQ) was designed to assess patients' perceived degree of autonomy support within the care practice settings. The main purpose of this study was to translate and evaluate psychometric properties of the Persian version of the HCCQ (HCCQ-P) to be applied among Iranian and other Persian-speaking patients with type 2 diabetes. Method: Translation/back-translation procedures were carried out to prepare a preliminary draft of the HCCQ-P that was subsequently sent for face and content validity appraisal by a group of 15 health education/promotion and nursing specialists. Minor revisions were performed based on the feedback, and the content validity ratio (=0.91) and content validity index (=0.95) were within the acceptable range. The structural validity of the scale was assessed by exploratory and confirmatory factor analysis. Results: The exploratory and confirmatory factor analysis outputs (root mean square error of approximation=0.079, comparative fit index=0.976, Tucker Lewis index=0.967, standardized root mean square residual=0.022) demonstrated the proper performance and fitness statistics of the translated HCCQ in a one-dimensional model similar to the original scale. The internal consistency and reliability scores endorsed the validity of the translated measure (α=0.945, intraclass correlation coefficient=0.999, P=0.000). Conclusion: In this study, the translated HCCQ-P scale showed robust internal validity for its application in the assessment of health-care settings' supportiveness in care provision to Persian-speaking patients with type 2 diabetes. Future cross-cultural and multidisciplinary studies are recommended to investigate the applicability of the scale in different patients/cultural groups and health-care settings.

Measuring the reliability and validity of the Greek edition of the Diabetes Quality of Life Brief Clinical Inventory

BACKGROUND

The present study focuses on studying the validity and reliability of the Greek edition of DQOL-BCI. DQOL-BCI includes 15 questions-elements that are evaluated on a 5-grade scale like Likert and two general form-shapes.

METHODS

The translation process was conducted in conformity with the guidelines of EuroQol group. A non-random sample of 65 people-patients diagnosed with diabetes I and II was selected. The questionnaire that was used to collect the data was the translated version of DQOL-BCI, and included the demographic characteristics of the interviewees. The content validity of DQOL-BCI was re-examined from a team of five experts (expert panel) for qualitative and quantitative performance. The completion of the questionnaire was done via a personal interview.

RESULTS

The sample consisted of 58 people (35 men and 23 women, 59.9 ± 10.9 years). The translation of the questionnaire was found appropriate in accordance to the peculiarities of the Greek language and culture. The largest deviation of values is observed in QOL1 (1.71) in comparison to QOL6 (2.98). The difference between the standard deviations is close to 0.6. The statistics results of the tests showed satisfactory content validity and high construct validity, while the high values for Cronbach alpha index (0.95) reveal high reliability and internal consistency.

CONCLUSIONS

The Greek version of DQOL-BCI has acceptable psychometric properties and appears to demonstrate high internal reliability and satisfactory construct validity, which allows its use as an important tool in evaluating the quality of life of diabetic patients in relation to their health.

Positive Aspects of Caregiving Questionnaire

OBJECTIVE

The potential role of positive aspects of caregiving in enhancing caregivers' health is an important issue. The aim of this study was to develop and validate Positive Aspects of Caregiving Questionnaire (PACQ) in caregivers of patients with dementia in Iran.

METHODS

Content validation process was used to content valid development. Cronbach α and intraclass correlation coefficient (ICC) were calculated as reliability indices. We used exploratory factor analysis to extract potential latent factors and evaluate the factor structure of PACQ. We assess correlation between PACQ and caregiver burden for divergent validity. For convergent validity, correlation between PACQ and self-rated health was specified.

RESULTS

Content validity indices (CVIs), internal consistency, and test-retest reliability were CVI > 0.80, α = 0.785, and ICC = 0.905, respectively. Moreover, item-total correlations confirmed good reliability of PACQ. Two factors were identified by factor analysis in this 10-item measure: patient and caregiver relationship and caregiver's psychological well-being. Divergent validity and convergent validity were established by high negative correlation between positive aspect of caregiving (PAC) and caregiver burden along with significant positive correlation between PAC and self-rated health, respectively. While Cronbach α for the entire scale was 0.785, Cronbach αs for both of the scale components were 0.71.

CONCLUSION

The PACQ demonstrated acceptable psychometric properties of reliability and performs well in preliminary tests of validity as a measure of positive aspects of caregiving. This measure can be used to determine the outcome of interventional programs on positive, not only negative, aspect of caregiving.

The effect of progressive muscle relaxation on glycated hemoglobin and health-related quality of life in patients with type 2 diabetes mellitus

AIM

This study aimed to evaluate the effect of Jacobson's progressive muscle relaxation (PMR) on glycated hemoglobin (HbA1c) levels and health-related quality of life (HRQoL) in patients with type 2 diabetes mellitus (DM).

BACKGROUND

Due to relatively poor HRQoL in patients with type 2 DM, different stress reduction techniques was applied to improve physical and mental health in these patients.

METHODS

This randomized controlled clinical trial was conducted at the Diabetes and Endocrinology Institute of Firoozgar Hospital, Tehran, Iran, between June and December 2015. Sixty-five patients with type 2 DM were randomly divided into the control (n=35) and PMR (n=30) groups. The patients of the control group only received the conventional care. The PMR group practiced Jacobson's PMR at home for 12 weeks and were monitored by the researcher's phone calls and patient's self-report list. For both groups, Iranian Diabetes Quality of Life Brief Clinical Inventory (IDQoL-BCI) questionnaire was completed and HbA1c levels were measured before and 12 weeks after study entry.

RESULTS

The results showed that there were no significant differences in terms of HbA1c levels and HRQoL scores between the PMR and control groups 12 weeks after intervention. However, in the PMR group, the intervention led to a significant reduction in HbA1c levels (P=0.04) and a significant increase in total HRQoL score (P=0.045) and its psychosocial dimension (P=0.019).

CONCLUSION

PMR had no significant impact on HbA1c levels and HRQoL in patients with type 2 DM. Further studies with larger sample size and longer follow-up are needed to improve QoL in patients with type 2 DM.

Linguistic and psychometric validation of the Malaysian version of Diabetes Quality of Life-Brief Clinical Inventory (DQoL-BCI)

BACKGROUND

Quality of life (QoL) assessment provides valuable outcome to support clinical decision-making, particularly for patients with chronic diseases that are incurable. A brief, 15-item diabetes-specific tool [i.e. Diabetes Quality of Life-Brief Clinical Inventory (DQoL-BCI)] is known to be developed in English and validated for use in clinical practice. This simplified tool, however, is not readily available for use in the Malaysian setting.

OBJECTIVE

To translate the DQoL-BCI into a Malaysian version and to assess its construct validity (factorial validity, convergent validity and discriminant validity), reliability (internal consistency) and floor and ceiling effects among the Malaysian diabetic population.

MATERIAL AND METHODS

A forward-backward translation, involving professional translators and experts with vast experience in translation of patient reported outcome measures, was conducted. A total of 202 patients with Type 2 diabetes mellitus (T2DM) who fulfilled the inclusion criteria were invited to complete the translated DQoL-BCI. Data were analysed using SPSS for exploratory factor analysis (EFA), convergent and discriminant validity, reliability and test-retest, and AMOS software for confirmatory factor analysis (CFA).

RESULTS

Findings from EFA indicated that the 4-factor structure of the Malaysian version of DQoL-BCI was optimal and explained 50.9% of the variance; CFA confirmed the 4-factor model fit. There was negative, moderate correlation between the scores of DQoL-BCI (Malaysian version) and EQ-5D-3L utility score (r = -0.329, p = 0.003). Patients with higher glycated haemoglobin levels (p = 0.008), diabetes macrovascular (p = 0.017) and microvascular (p = 0.013) complications reported poorer QoL. Cronbach's alpha coefficient and intraclass coefficient correlations (range) obtained were 0.703 and 0.86 (0.734-0.934), indicating good reliability and stability of the translated DQoL-BCI.

CONCLUSION

This study had validated the linguistic and psychometric properties of DQoL-BCI (Malaysian version), thus providing a valid and reliable brief tool for assessing the QoL of Malaysian T2DM patients.

Feasibility, Reliability, and Validity of the Iranian Version of the Quality of Life Questionnaire for Pregnancy

Background

Clinical studies are giving increased importance to quality of life assessments as measures of the relative effectiveness of prevention and treatment programs used during pregnancy and antenatally.

Objectives

The aim of this study was to validate the Quality of life gravidarum (QOL-GRAV) questionnaire for Iranian women during the pregnant period

Patients and Methods

In this cross-sectional methodological study, content validity following back and forward translation was assessed by a panel of experts. Using the two-stage cluster sampling method, 565 pregnant women referred to health care centers from April to June 2015 in Tabriz, Iran were enrolled in the study. Construct validity by assessing the factor structure, and convergent and discriminant validity were evaluated using scale-item correlations and known group analyses. Internal consistency and test–retest reliability were assessed in a sample of 30 pregnant women by the Cronbach’s α coefficient and intra-class correlation coefficient (ICC).

Results

The QOL-GRAV showed good content validity (CVI value = 0.95 and CVR value = 1), internal consistency (α = 0.79), and test–retest reliability (ICC = 0.86). The results of the CFA for two-factor models indicate an acceptable fit of the proposed model (RMSEA; 90% CI = 0.083; 0.068–0.099, CFI = 0.95, GFI = 0.96, and AGFI = 0.92).

Conclusions

The findings support the validity and reliability of the Iranian version of the QOL-GRAV questionnaire. Therefore, it is recommended to be used for both clinical and research purposes.

Validity, Reliability and Feasibility of the Eating Behavior Pattern Questionnaire (EBPQ) among Iranian Female Students

BACKGROUND

The aim of this study was to assess the validity, reliability and feasibility of eating behavior pattern questionnaire (EBPQ) in female university students.

METHODS

In this study, after forward-backward translation, the questionnaire was reviewed by a panel of nutritionists and a psychologist and further thirty participants for the content validity measurement. The translated and modified questionnaire was completed by 225 female students of Tabriz University in 2013. Principle axis factoring, confirmatory factor analysis and known group analysis were conducted for construct, convergent and discriminant validity. Internal consistency and test-retest reliability were assessed by Cronbach's α coefficient and intra-class correlation coefficient (ICC). Ceiling and floor effects were also performed for evaluating the feasibility of the instrument.

RESULTS

By using exploratory factor analysis, nine factors were extracted. Confirmatory factor analysis confirmed the convergent validity. Cronbach 's αand ICC were ranged between 0.55 to 0.78 and 0.67 to 0.89, respectively. The significant difference for some three subscales between diabetes and healthy subjects determined the discriminant validity. No ceiling and floor effects were found.

CONCLUSION

Our findings demonstrate the initial validity, reliability and feasibility of the Iranian version of EBPQ as a useful tool for eating behavior studies in young females.

Validation of the Polish version of Diabetes Quality of Life - Brief Clinical Inventory (DQL-BCI) among patients with type 2 diabetes

INTRODUCTION

The aim of the study was to develop a Polish version of the Diabetes Quality of Life Brief Clinical Inventory (DQL-BCI) and to perform validating evaluation of selected psychometric aspects.

MATERIAL AND METHODS

The translation process was performed in accordance with generally accepted international principles of translation and cultural adaptation of measurement tools. Two hundred and seventy-four subjects with type 2 diabetes completed the Polish version of DQL-BCI, the generic EQ-5D questionnaire and the diabetes-specific DSC-R. The examination provides information about the reliability (internal consistency, test-retest) and the construct validity of the studied tool (the relationship between the DQL-BCI score and EQ-5D and DSC-R scales, as well as selected clinical patient characteristics).

RESULTS

Cronbach's α (internal consistency) for the translated version of DQL-BCI was 0.76. Test-retest Pearson correlation coefficient was 0.96. Spearman's coefficient correlation between DQL-BCI score and EQ-5D index and EQ-VAS were 0.6 (p = 0.0000001) and 0.61 (p = 0.0000001) respectively. The correlation between scores of the examined tool and DSC-R total score was -0.6 (p = 0.0000001). Quality of life was lower among patients with microvascular as well as macrovascular complications and with occurring hypoglycemic episodes.

CONCLUSIONS

The result of this study is the Polish scale used to test the quality of life of patients with diabetes, which includes the range of problems faced by patients while maintaining a patient-friendly form. High reliability of the scale and good construct validity qualify the Polish version of DQL-BCI as a reliable tool in both research and individual diagnostics.

The Vulvovaginal Symptoms Questionnaire: a questionnaire for measuring vulvovaginal symptoms in postmenopausal women

OBJECTIVE

This study aims to develop a Vulvovaginal Symptoms Questionnaire (VSQ) to determine the symptoms, emotions, life impact, and sexual impact of vulvovaginal symptoms on postmenopausal women.

METHODS

We developed a questionnaire that focuses on vulvovaginal symptoms based on modifications to Skindex-16, a validated questionnaire for measuring the impact of skin disease. We recruited postmenopausal women seeking routine gynecologic care to test the psychometric properties of the VSQ. Test-retest reliability was assessed 2 to 4 weeks after their initial recruitment and measured using intraclass coefficients. Four distinct a priori scales of the VSQ were developed: symptoms, emotions, life impact, and sexual impact. Confirmatory factor analysis was performed to verify the four a priori scales by evaluating the goodness of fit of a final confirmatory factor analysis model. The internal consistency of the scales was assessed by calculating Cronbach's α coefficients.

RESULTS

The VSQ is a 21-item written questionnaire with four scales: symptoms, emotions, life impact, and sexual impact. One hundred twenty postmenopausal women participated in the psychometric validation of the VSQ. The test-retest reliability measured by intraclass coefficients was 0.75, 0.60, 0.55, and 0.65 for the symptoms, emotions, life impact, and sexual impact scales, respectively. The goodness of fit of the confirmatory factor response model was confirmed. The Cronbach's α coefficients were 0.76, 0.87, 0.83, and 0.82 for the respective scales.

CONCLUSIONS

The VSQ is a reliable and internally consistent instrument for measuring vulvovaginal symptoms in postmenopausal women.