Construct validity of the 12-item Short Form Health Survey (SF-12) version 2 and the impact of lifestyle modifications on the health-related quality of life among Indian adults with prediabetes: results from the D-CLIP trial.

PURPOSE: This study aimed to validate the factor structure of the 12-item Short-Form (SF-12) health-related quality of life (HRQOL) survey for Indian adults and assess the impact of lifestyle modification on the SF-12 of Indian adults with prediabetes. METHODS: To validate the context-specific construct of the SF-12, two-factor confirmatory factor analysis (CFA) was performed using data from 1285 adults residing in Chennai, India, who screened for the Diabetes Community Lifestyle Improvement Program (D-CLIP). D-CLIP was a randomized controlled trial of 578 participants with prediabetes (283 treatment, 293 control), focusing on the effect of lifestyle modifications on the prevention of diabetes. Physical and mental component scores (PCS and MCS) were computed by using CFA standardized factor loadings. Multiple linear regression was subsequently conducted to estimate the effect of lifestyle modification on post-study changes of PCS and MCS among D-CLIP participants. RESULTS: Cronbach's alpha and CFA fit indices demonstrated acceptable reliability and model fit of the SF-12 for Indian adults. The intervention group showed greater mean change in PCS after study participation compared to the controls (1.63 ± 0.82, p = 0.046); no significant difference was observed for MCS between two groups (1.00 ± 0.85, p = 0.242). CONCLUSION: The study confirmed that the SF-12 is suitable for assessing the physical and mental health dimensions of HRQOL for Indian adults. Our findings suggest that the benefits of diabetes prevention lifestyle modification strategies may primarily enhance the physical well-being of adults with prediabetes. Further studies validating the SF-12 in a broader Asian Indian population are needed. TRIAL REGISTRATION: Clinicaltrials.gov, NCT01283308.

Circulatory levels of lysophosphatidylcholine species in obese adolescents: Findings from cross-sectional and prospective lipidomics analyses.

BACKGROUND AND AIMS: Obesity has reached epidemic proportions, emphasizing the importance of reliable biomarkers for detecting early metabolic alterations and enabling early preventative interventions. However, our understanding of the molecular mechanisms and specific lipid species associated with childhood obesity remains limited. Therefore, the aim of this study was to investigate plasma lipidomic signatures as potential biomarkers for adolescent obesity. METHODS AND RESULTS: A total of 103 individuals comprising overweight/obese (n = 46) and normal weight (n = 57) were randomly chosen from the baseline ORANGE (Obesity Reduction and Noncommunicable Disease Awareness through Group Education) cohort, having been followed up for a median of 7.1 years. Plasma lipidomic profiling was performed using the UHPLC-HRMS method. We used three different models adjusted for clinical covariates to analyze the data. Clustering methods were used to define metabotypes, which allowed for the stratification of subjects into subgroups with similar clinical and metabolic profiles. We observed that lysophosphatidylcholine (LPC) species like LPC.16.0, LPC.18.3, LPC.18.1, and LPC.20.3 were significantly (p < 0.05) associated with baseline and follow-up BMI in adolescent obesity. The association of LPC species with BMI remained consistently significant even after adjusting for potential confounders. Moreover, applying metabotyping using hierarchical clustering provided insights into the metabolic heterogeneity within the normal and obese groups, distinguishing metabolically healthy individuals from those with unhealthy metabolic profiles. CONCLUSION: The specific LPC levels were found to be altered and increased in childhood obesity, particularly during the follow-up. These findings suggest that LPC species hold promise as potential biomarkers of obesity in adolescents, including healthy and unhealthy metabolic profiles.

Perceived stress and progression of cardiometabolic risk factors among South Asians with prediabetes in a lifestyle intervention trial.

AIMS: To examine associations between perceived stress and cardiometabolic risk factors in South Asians with prediabetes and assess whether a diabetes prevention program mitigates the impact of stress on cardiometabolic health. METHODS: We conducted a secondary analysis of the Diabetes Community Lifestyle Improvement Program, a lifestyle modification trial for diabetes prevention in India (n = 564). Indicators for cardiometabolic health (weight, waist circumference, blood pressure, glucose, HbA1c, and lipids) were measured at each visit while perceived stress was assessed via questionnaire at baseline. Multivariable linear regression assessed associations between stress and cardiometabolic parameters at baseline and 3-year follow up. RESULTS: At baseline, perceived stress was associated with higher weight (b=0.16; 95% CI: 0.04, 0.29) and waist circumference (b=0.11; 95% CI: 0.01, 0.21) but lower 30-minute postload glucose (b=-0.44; 95% CI: -0.76, -0.14) and LDL cholesterol (b=-0.40; 95% CI: -0.76, -0.03). Over the study period, perceived stress was associated with weight gain (b=0.20; 95% CI: 0.07, 0.33) and increased waist circumference (b=0.14; 95% CI: 0.04, 0.24). Additionally, higher perceived stress was associated with lower HDL cholesterol among the control arm (pinteraction = 0.02). CONCLUSIONS: Baseline stress was associated with negative cardiometabolic risk factor outcomes over time in those with prediabetes.

Adapting and scaling a proven diabetes prevention program across 11 worksites in India: the INDIA-WORKS trial.

BACKGROUND: Structured lifestyle change education reduces the burden of cardiometabolic diseases such as diabetes. Delivery of these programs at worksites could overcome barriers to program adoption and improve program sustainability and reach; however, tailoring to the worksite setting is essential. METHODS: The Integrating Diabetes Prevention in Workplaces (INDIA-WORKS) study tested the implementation and effectiveness of a multi-level program for reducing cardiometabolic disease risk factors at 11 large and diverse worksites across India. Herein, we describe and classify program adaptations reported during in-depth interviews and focus group discussions with worksite managers, program staff, and peer educators involved in program delivery, and program participants and drop-outs. We used thematic analysis to identify key themes in the data and classified reported program adaptations using the FRAME classification system. RESULTS: Adaptations were led by worksite managers, peer educators, and program staff members. They occurred both pre- and during program implementation and were both planned (proactive) and unplanned (proactive and reactive). The most frequently reported adaptations to the individual-level intervention were curriculum changes to tailor lessons to the local context, make the program more appealing to the workers at the site, or add a wider variety of exercise options. Other content adaptations included improvements to the screening protocol, intervention scheduling, and outreach plans to tailor participant recruitment and retention to the sites. Environment-level content adaptations included expanding or leveraging healthy food and exercise options at the worksites. Challenges to adaptation included scheduling and worksite-level challenges. Participants discussed the need to continue adapting the program in the future to continue making it relevant for worksite settings and engaging for employees. CONCLUSION: This study describes and classifies site-specific modifications to a structured lifestyle change education program with worksite-wide health improvements in India. This adds to the literature on implementation adaptation in general and worksite wellness in India, a country with a large and growing workforce with, or at risk of, serious cardiometabolic diseases. This information is key for program scale-up, dissemination, and implementation in other settings. TRIAL REGISTRATION: Clinicaltrials.gov NCT02813668. Registered June 27, 2016.

The impact of yoga on stress, metabolic parameters, and cognition of Indian adolescents: Cluster randomized controlled trial.

Background: This project aimed to assess the impact of yoga on stress, metabolic parameters and cognition (attention & concentration) in adolescents, aged 13-15 years from public and private schools in two cities (Chennai and New Delhi) in India. Methods: The study recruited 2000 adolescents from 24 schools in a cluster randomized controlled trial design. The yoga group participants underwent 17 yoga sessions, which included: pranayama, basic asanas, meditation and relaxation exercises. Yoga sessions, were held in the school premises once a week. A total of five awareness talks on healthy lifestyle were delivered once a month to the education group. ADOlescence Stress Scale (ADOSS), salivary cortisol, metabolic and clinical parameters and Letter Cancellation Test (LCT) score were measured at baseline and post-intervention (5-6 months). Results: The yoga group showed statistically significant differences in the mean ADOSS score, metabolic parameters, salivary cortisol, and LCT scores compared to the education group. In the intention- to- treat analysis, a significant reduction [5.11, 95% CI (4.78, 5.36), p = 0.001] in ADOSS score was seen in the yoga group compared to education. Conclusion: Implementation of a 17-week standardized yoga program at the school level significantly decreased stress, improved attention and concentration, metabolic and clinical parameters in Indian adolescents. Trial registration: Clinical Trials Registry, India (CTRI/2017/08/009203).

Adapting and scaling a proven diabetes prevention program across 11 worksites in India: the INDIA-WORKS trial.

Background: Delivery of proven structured lifestyle change education for reducing the burden of cardiometabolic diseases such as diabetes at worksites could overcome barriers to program adoption and improve sustainability and reach of these programs; however, tailoring to the worksite setting is essential. Methods: The Integrating Diabetes Prevention in Workplaces (INDIA-WORKS) study tested the implementation and effectiveness of a multi-level program for reducing cardiometabolic disease risk factors at eleven large and diverse worksites across India. Herein, we describe and classify program adaptations reported during in-depth interviews and focus group discussions with worksite managers, program staff, peer educators involved in program delivery, and program participants and drop-outs. We used thematic analysis to identify key themes in the data and classified reported program adaptations using the FRAME classification system. Results: Adaptations were led by worksite managers, peer educators, and program staff members. They occurred both pre- and during program implementation and were both planned (proactive) and unplanned (proactive and reactive). The most frequently reported adaptations to the individual-level intervention were curriculum changes to tailor lessons to the local context, make the program more appealing to the workers at the site, or add exercise options. Other content adaptations included improvements to the screening protocol, intervention scheduling, and outreach plans to tailor participant recruitment and retention to the sites. Environment-level content adaptations included expanding or leveraging healthy food and exercise options at the worksites. Challenges to adaptation included scheduling and worksite-level challenges. Participants discussed the need to continue adapting the program in the future to continue making it relevant for worksite settings and engaging for employees. Conclusion: This study describes and classifies site-specific modifications to a structured lifestyle change education program with worksite-wide health improvements in India. This adds to the literature on implementation adaptation in general and worksite wellness in India, a country with a large and growing workforce with, or at risk of, serious cardiometabolic diseases. This information is key for program scale-up, dissemination, and implementation in other settings. Trial Registration: Clinicaltrial.gov NCT02813668, registered June 27, 2016.

Reliability and Validity of the Adolescence Stress Scale (ADOSS) for Indian Adolescents.

Background: Stress levels increase tremendously in adolescence. Indian adolescents derive much of their stress from school and family pressures. Developing a standardized tool to assess adolescent stress can help early diagnosis. This article aimed to assess the reliability and validity of the ADOlescence Stress Scale (ADOSS). Methods: ADOSS was administrated by trained interviewers to 100 adolescents (10-17 years) of both sexes in Chennai, South India. Salivary cortisol was used as an objective measure of stress in 40 adolescents. Reliability was assessed within a two weeks interval. Exploratory factor analysis was done for the baseline ADOSS scores. The internal consistency (Cronbach's alpha and spilt-half correlation), test-retest agreement (Kappa value), and inter-rater reliability (ICC) were assessed. Pearson correlation between salivary cortisol and ADOSS score was done. Results: The inter-factor correlation between the inherent four ADOSS factors (personal, academic, family, and social) was between 0.73 and 0.87, and split-half correlation was between 0.70 and 0.83, showing that the factors are reliable and coherent. Test-retest agreement was Kappa: 0.63, P = 0.001, and ICC was 0.84. Pearson correlation showed a statistically significant positive correlation between cortisol levels and ADOSS scores (r = 0.87, P = 0.001). Conclusion: ADOSS is a reliable and valid tool to assess the overall stress of Indian adolescents in the age group of 10-17 years.

Associations of the built environment with type 2 diabetes in Asia: a systematic review.

OBJECTIVES: Our study aimed to systematically review the literature and synthesise findings on potential associations of built environment characteristics with type 2 diabetes (T2D) in Asia. DESIGN: Systematic review of the literature. DATA SOURCES: Online databases Medline, Embase and Global Health were used to identify peer-reviewed journal articles published from inception to 23 January 2023. ELIGIBILITY CRITERIA: Eligible studies included cohort, cross-sectional and case-control studies that explored associations of built environment characteristics with T2D among adults 18 years and older in Asia. DATA EXTRACTION AND SYNTHESIS: Covidence online was used to remove duplicates and perform title, abstract and full-text screening. Data extraction was carried out by two independent reviewers using the OVID database and data were imported into MS Excel. Out of 5208 identified studies, 28 studies were included in this systematic review. Due to heterogeneity in study design, built environment and outcome definitions, a semiqualitative analysis was conducted, which synthesised results using weighted z-scores. RESULTS: Five broad categories of built environment characteristics were associated with T2D in Asia. These included urban green space, walkability, food environment, availability and accessibility of services such as recreational and healthcare facilities and air pollution. We found very strong evidence of a positive association of particulate matter (PM2.5, PM10), nitrogen dioxide and sulfur dioxide (p<0.001) with T2D risk. CONCLUSION: Several built environment attributes were significantly related to T2D in Asia. When compared with Western countries, very few studies have been conducted in Asia. Further research is, therefore, warranted to establish the importance of the built environment on T2D. Such evidence is essential for public health and planning policies to (re)design neighbourhoods and help improve public health across Asian countries. PROSPERO REGISTRATION NUMBER: CRD42020214852.

Effects of Intermittent Fasting on Weight Loss in Asian Indian Adults with Obesity.

BACKGROUND: Worldwide, obesity has nearly tripled since 1975 and has become a major healthcare challenge today. Intermittent fasting (IF) is gaining popularity as a weight loss strategy in recent times. This study aimed to study the role of IF as a modern-day weight-loss strategy in obese adults through a real-world pilot experiment conducted at a nutrition clinic in Mumbai. METHODOLOGY: To understand the effects of IF on weight loss, 32 overweight/obese [body mass index (BMI) ≥23 kg/m2] adults from a nutrition clinic in Mumbai, were assigned consecutively to an IF plan and followed up for 3 months. Their demographic, anthropometric, and dietary assessments were done pre- and post-intervention. Qualitative interviews were done at the end of the study to record the participants' overall well-being, experience, and sustainability of IF. RESULTS: 56% of study participants were males and their mean age was 35.6 ± 8.9 years. 65.6% of participants were able to maintain 14-16 hours of fasting and 53% managed all 7 days of IF. Analysis of post-intervention data showed a significant reduction in mean body weight (88.5 ± 19 to 83.8 ± 17.6 kg), waist circumference (M: 108.2 ± 11.3 to 103.6 ± 4.4 cm, F: 98.9 ± 8.8 to 93.3 ± 3.3 cm), BMI (31.4 ± 5.3 to 29.6 ± 5.1 kg/m2), daily calories (1782 ± 237 to 1388 ± 243 kcal/day), carbohydrate intake (267 ± 18.4 to 164 ± 4.0 g/day), and an increase in protein intake (39 ± 11 to 55 ± 11 g/day). Participants reported positive experiences of practicing IF such as improved fitness, sleep cycle, and adoption of healthy eating habits. CONCLUSION: The study demonstrates that IF could aid in weight loss and adoption of a healthier lifestyle.

Correction: Blood-derived miRNA levels are not correlated with metabolic or anthropometric parameters in obese pre-diabetic subjects but with systemic inflammation.

[This corrects the article DOI: 10.1371/journal.pone.0263479.].

Associations of accelerometer measured school- and non-school based physical activity and sedentary time with body mass index: IPEN Adolescent study.

BACKGROUND: This study examined the strength, shape and direction of associations of accelerometer-assessed overall, school- and non-school-based moderate-to-vigorous physical activity (MVPA) and sedentary time (ST) with BMI among adolescents across the world. Second, we examined whether these associations differed by study site and sex. METHODS: Cross-sectional data from the IPEN Adolescent study, an observational multi-country study, were used. Participants wore an accelerometer for seven days, reported height and weight, and completed a socio-demographic survey. In total, 4852 adolescents (46.6% boys), aged 11-19 years (mean age = 14.6, SD = 1.7 years) were included in the analyses, using generalized additive mixed models. RESULTS: Adolescents accumulated on average 41.3 (SD = 22.6) min/day of MVPA and 531.8 (SD = 81.1) min/day of ST, and the prevalence of overweight and obesity was 17.2% (IOTF), but these mean values differed by country. Linear negative associations of accelerometer-based MVPA and ST with standardized BMI scores and the likelihood of being overweight/obese were found. School-based ST and non-school-based MVPA were more strongly negatively associated to the outcomes than non-school based ST and school-based MVPA. Study site moderated the associations; adolescent sex did not. No curvilinear associations were found. CONCLUSIONS: This multi-country study confirmed the importance of MVPA as a potential protective factor against overweight/obesity in adolescents. Non-school-based MVPA seemed to be the main driver of these associations. Unexpected results were found for ST, calling for further examination in methodologically sound international studies but using inclinometers or pressure sensors to provide more precise ST measures.

Change in cardiometabolic risk factors among Asian Indian adults recruited in a mHealth-based diabetes prevention trial.

OBJECTIVE: India is experiencing an increasing prevalence of type 2 diabetes and cardiovascular diseases. Mobile health technology may be a strategy to reduce the risk of cardiometabolic disorders. This paper reports on the effect of a mobile health intervention on cardiometabolic risk factors. METHODS: The mobile health and diabetes intervention was a 12-week reality television-based mobile health program application delivered via videos, short message service and infographics through a smartphone application followed-up weekly by health coach calls. mobile health and diabetes was conducted in a randomized control trial mode randomized controlled trial methodology in three Indian cities (Chennai, Bengaluru and New Delhi) with participants recruited via community screening events. This paper looks at the pre-post changes in cardiometabolic risks among the participants and the place of demography in influencing these. RESULTS: The mobile health and diabetes intervention group experienced a small reduction in waist circumference (1.8 cm) compared to the control group (0.5 cm, p < 0.05) and a greater decrease in systolic blood pressure (2.7 mmHg) compared to the control group (p < 0.05). The improvements in cardiometabolic risk factors were more pronounced in individuals with obesity, although overall effects were very modest. CONCLUSIONS: Cardiometabolic risk factors can be reduced with a mobile health application using human coaching, especially in obese individuals, but the improvements are small. To be more effective and clinically meaningful, intensive engagement with the participants is probably required.

A Novel High-Intensity Short Interval Dance Intervention (THANDAV) to Improve Physical Fitness in Asian Indian Adolescent Girls.

Background: There exist several barriers to physical activity (PA) among adolescent girls. We therefore developed a culturally acceptable dance/fitness intervention called THANDAV (Taking High-Intensity Interval Training [HIIT] ANd Dance to Adolescents for Victory over noncommunicable diseases [NCDs]). The main aim of this study was to evaluate the THANDAV protocol among Asian Indian girls aged 10 to 17 years. Materials and Methods: THANDAV consisted of a 10-min routine with high- and low-intensity dance steps that was taught to 23 adolescent girls. Heart rate (HR), energy expenditure, body mass index (BMI), and blood pressure (BP) were recorded. Focused group discussions (FGDs) were conducted after the quantitative measurements were completed. Results: The average age of the girls was 13.9 ± 2.1 years, and the mean BMI and BP were 19.8 ± 3.3 kg/m2 and 107/68 (±8/7) mm/Hg, respectively. All participants achieved 80% of their maximum HR during the first dance and managed to sustain this HR throughout the 10-min routine. There was a significant increase in the HR (bpm) [88.7 ± 8.4 to 195.6 ± 11.8, P < 0.001] and VO2 (L/min) [0.025 ± 0.0 to 0.395 ± 0.1, P < 0.001] postintervention. The average energy cost of the activity (metabolic equivalent) was 6.3. The FGDs revealed that THANDAV was a socially acceptable, fun, and energetic form of PA. Conclusions: The THANDAV intervention meets HIIT norms and is a novel culturally appropriate form of PA that is enjoyable, takes little time, and can be done at home. It has the potential to be a sustainable intervention to improve cardiorespiratory fitness and prevent NCDs in Asian Indian adolescent girls. Clinical Trials Registry of India: CTRI/2020/02/023384.

Moderate-to-vigorous physical activity changes in a diabetes prevention intervention randomized trial among South Asians with prediabetes - The D-CLIP trial.

AIMS: The Diabetes Community Lifestyle Improvement Program (D-CLIP) was a lifestyle education program to prevent diabetes in South Asians with prediabetes. This paper examines the impact of the D-CLIP intervention on moderate-to-vigorous intensity physical activity (MVPA). METHODS: This randomized controlled trial to prevent diabetes included 573 individuals with prediabetes from Chennai, India. The intervention was designed to increase MVPA to ≥150 minutes per week. MVPA was measured by questionnaire at baseline, six, 12, 18, 24, 30 and 36 months of follow-up. Random effects models were used to examine the relationship between treatment group and odds of reporting ≥150 weekly minutes of MVPA and to examine the impact of the intervention on weekly MVPA. RESULTS: With the exception of the proportion of respondents at baseline with a high waist circumference, selected sample characteristics did not differ at baseline between the intervention and control groups. The intervention significantly (p < 0.05) increased the proportion of respondents who reported ≥150 weekly minutes of MVPA by 28.5%, 13.6% and 14.0% at six, 12 and 18 months respectively. Mean minutes of weekly MVPA significantly (p < 0.05) increased by an additional 56.7, 34.3, 23.6 and 24.3 minutes/week at six, 12, 18, and 24 months, respectively. CONCLUSION: The D-CLIP intervention significantly increased MVPA at six, 12 and 18 months of follow-up. Interventions to prevent diabetes in South Asians with prediabetes can significantly increase MVPA in this population.

Individual, Social and Environmental Correlates of Active School Travel among Adolescents in India.

Active School Travel (AST) is an important domain for physical activity among adolescents; however, few studies in India have explored barriers or correlates of AST. This was a cross-sectional study of 324 adolescents aged 12-17 years recruited via households and schools from diverse areas of Chennai, India. Adolescents reported their mode of travel to school, neighbourhood correlates, and the barriers for AST. Adolescents were considered to be using AST to/from school if they walked/cycled ≥once/week during an average week. Half the adolescents usually performed AST (≥1 trip/week). School being too far was associated with 75% lower odds and parents not allowing their child to walk or cycle was associated with 82% lower odds of the adolescent performing AST to or from school at least once/week. AST among adolescents should be encouraged and there is considerable scope for improvement. Parental restriction and distance to school were the two strongest barriers for AST.

Acceptability and Utilization of Newer Technologies and Effects on Glycemic Control in Type 2 Diabetes: Lessons Learned from Lockdown.

Aim: To evaluate the effects of a prolonged lockdown due to Coronavirus (COVID-19) on the adoption of newer technologies and changes in glycemic control on patients with type 2 diabetes (T2D) in India. Methods: The study population included a random list of 3000 individuals with T2D derived from 30,748 individuals who had visited a large tertiary diabetes center during the past year. The survey was carried out through a telephonic interview. A structured questionnaire was used to collect information on changes in lifestyle, access and challenges to diabetes care and use of technologies such as telemedicine facilities and use of self-monitoring of blood glucose (SMBG), etc. Results: Of the 2510 individuals successfully interviewed (83.7% response rate), 382 (15.2%) reported having attempted to consult their health care providers during the lockdown, of whom only 30.6% utilized the telemedicine facility. However, 96 (82%) of those who utilized the telemedicine facility (n = 117) were happy with their experience and 68 (58.1%) were willing to continue to use the facility in the future. Only 11.4% of participants utilized online support for management of diabetes. Use of SMBG increased significantly from 15.5% to 51.3% during the lockdown. There was an improvement in glycemic control during the lockdown (HbA1c:before vs. during lockdown: 8.2% ± 1.9% vs. 7.7% ± 1.7%, P < 0.001) in a nonrandomly selected subset of subjects (n = 205). Conclusions: Acceptance of telemedicine facilities remains suboptimal in this Asian Indian population, in spite of high levels of satisfaction among those who utilized it. The COVID-19 pandemic and the subsequent lockdown have not adversely affected metabolic control in our patients, and indeed there appears to be an improvement in HbA1c levels. Greater accessibility and acceptance of technology could help individuals with diabetes to maintain better contact with their physicians and ensure better metabolic control in the future.

Reliability and Validity of a Physical Activity Questionnaire for Indian Children and Adolescents.

BACKGROUND: In low- and middle-income countries, sedentary behavior is widely prevalent in the young. Reliable and valid instruments are essential for evaluating sedentary behavior and physical activity in children and adolescents. OBJECTIVE: To evaluate the reliability and validity of an easy to use physical activity questionnaire for children and adolescents from India. STUDY DESIGN: Evaluation of a questionnaire tool. PARTICIPANTS: 104 children and adolescents belonging to the age group of 10-17 years were selected using a purposive sampling technique. METHODS: The Madras Diabetes Research Foundation - Physical Activity Questionnaire for Children and Adolescents [MPAQ(c)] was used to assess the various dimensions of physical activity. Physical activity was also objectively assessed using accelerometer worn around the waist for five complete days. The baseline administration of MPAQ(c) was done between November and December, 2017. Reliability of MPAQ was assessed by repeat administration after 2 weeks for upto a month later. Validity of MPAQ(c) was measured against accelerometer using Spearman's correlation and Bland and Altman agreements. RESULTS: Test-retest reliability of the questionnaire revealed good agreement (ICC: 0.77 min/wk). Correlation coefficients (95% CI) for sedentary behavior and moderate to vigorous physical activity for MPAQ(c) against accelerometer were 0.52 (0.36, 0.64) and 0.41 (0.23, 0.55), respectively indicating moderate correlation. Good agreement was present between MPAQ(c) and accelerometer for sedentary behavior [mean bias = -4.9 (±2SD -197.1 to 187.3) min/d]. CONCLUSIONS: MPAQ(c) is a valid and reliable instrument for evaluating physical activity in Indian children aged 10-17 years.

Clinical utility of 30-min plasma glucose for prediction of type 2 diabetes among people with prediabetes: Ancillary analysis of the diabetes community lifestyle improvement program.

AIMS: To examine the clinical utility of 30-min plasma glucose (30-min-PG) measurement during an oral glucose tolerance (OGTT) in predicting type 2 diabetes (T2DM). RESEARCH DESIGN AND METHODS: Data from a 3-year, randomized, controlled, primary prevention trial among 548 Asian Indians with prediabetes were analyzed. Participants underwent OGTT with PG measurements at fasting, 30-min, and 2-h at baseline and annually until the end of the study. Multivariable Cox regression models were constructed to calculate the risk of developing diabetes based on 30-min-PG levels. Improvement in prediction performance gained by adding an elevated level of 30-min-PG over prediabetic categories was calculated using the area-under-curve (AUC), net-reclassification (NRI), and integrated discrimination improvement (IDI) statistics. RESULTS: At the end of follow-up, 30.4% of individuals had been diagnosed with T2DM by ADA criteria. Based on the maximally selected log-rank statistics, the optimal 30-min-PG cut point for predicting incident T2DM was >182 mg/dl. Multivariable-adjusted Cox regression models showed an independent association between elevated 30-min-PG (>182 mg/dl) and incident diabetes (hazard ratio (95% CI): 1.85 [1.32, 2.59]; Dxy = 0.353, c-statistic = 0.676). The addition of an elevated 30-min-PG (>182 mg/dl) model significantly improved the prediction of diabetes (Δdeviance: -15.4; ΔAUC: 0.11; NRIcontinuous: 0.51; IDI: 0.08) compared with IFG model alone) in individuals with prediabetes. CONCLUSION: In prediabetic individuals, baseline 30-min-PG independently predicted T2DM and significantly improved reclassification and discrimination. Therefore, 30-min-PG should be considered as part of the routine testing in addition to FPG and 2-h-PG for better risk stratification.

Engagement and Weight Loss: Results from the Mobile Health and Diabetes Trial.

Background: Prevalence of type 2 diabetes (T2D) is increasing worldwide. Identifying and targeting individuals at high risk, is essential for preventing T2D. Several studies point to mobile health initiatives delivered through personal smart devices being a promising approach to diabetes prevention, through weight loss. The aim of the mobile health and diabetes (mDiab) trial was twofold: to achieve 5% weight loss and to look at the association of weight loss with degree of engagement with the mDiab app. Methods: The mDiab randomized control trial was carried out among smartphone users who are at high risk for T2D mellitus in three cities-Chennai, Bengaluru, and New Delhi in India. The intervention was delivered through a mobile phone application along with weekly coach calls for 12 weeks. While individuals in the intervention group individuals received the app, which enabled tracking their weight, physical activity, and diet along with 12 weekly video lessons on T2D prevention and coach calls, the control group received usual care. Results: The intervention group experienced a significant 1 kg weight loss while the control group lost 0.3 kg (P < 0.05). More individuals in the intervention group (n = 139, 15%) met the 5% weight loss target than in the control group (n = 131, 9%). In the intervention group those who viewed the videos experienced greater weight loss (2.4 kg) than those who only attended coach calls (0.9 kg) (P < 0.01). Conclusions: An mHealth intervention helped to achieve moderate weight loss. Future studies should explore the sustainability of this weight loss.

Self-efficacy and diabetes prevention in overweight South Asians with pre-diabetes.

OBJECTIVE: We evaluated the effects of a diabetes prevention itervention on self-efficacy (SE) and the associations between SE and diabetes-related outcomes among overweight Asian Indian adults with pre-diabetes in a randomized controlled translational trial (the Diabetes Community Lifestyle Improvement Program, D-CLIP). RESEARCH DESIGN AND METHODS: Data were obtained from 550 adults who were randomized to a diabetes prevention program or standard of care. Dietary and exercise-related SEs were measured at baseline, core intervention completion (4 months), and annually until the end of follow-up (3 years or diabetes diagnosis). Mixed-effects regressions described changes in SE over time by treatment group. Among treatment participants, multivariable-adjusted models described associations of SE at baseline and intervention completion with diabetes incidence and other secondary outcomes (weight, waist circumference (WC), exercise, and energy intake). RESULTS: From baseline to 4 months, dietary (ß=10.3, p=0.04) and exercise (ß=0.49, p=0.04) SE increased significantly in the treatment arm only; however, this increase from baseline was no longer significant at later time points. Among treatment participants, there was no association of dietary or exercise SE with diabetes incidence, but baseline exercise SE was independently associated with improved weight, WC, and exercise at 4 months (p<0.05). Change in exercise SE from baseline to intervention completion also predicted increased exercise at 4, 12, and 24 months (p<0.05). CONCLUSIONS: Exposure to D-CLIP resulted in improved SE at treatment completion, but this effect was not sustained over longer follow-up. Several short-term and long-term secondary outcomes, but not diabetes risk, were significantly associated with exercise SE, suggesting this psychosocial trait may facilitate success in achieving certain health goals. TRIAL REGISTRATION NUMBER: NCT01283308.