Smartphone geospatial apps for dengue control, prevention, prediction, and education: MOSapp, DISapp, and the mosquito perception index (MPI)

India has the largest number of dengue cases in the world, contributing approximately 34% of the global burden. The framework for a geospatially enabled early warning and adaptive response system (EWARS) was first proposed in 2008. It was meant to be a decision support system for enhancing traditional surveillance methods for preventing mosquito-borne diseases in India by utilizing remote sensing data and fuzzy logic-based mathematical predictive modeling. This conceptual paper presents a significant evolution of EWARS such that it synthesizes inputs from not only traditional surveillance and reporting systems for dengue but also from the public via participatory disease surveillance. Two smartphone-based applications have been developed to support EWARS. The first-MOSapp-allows field health workers to upload surveillance data and collect key data on environmental parameters by both direct observation and via portable microclimate stations. The second-DISapp-collects relevant information directly from the community to support participatory disease surveillance. It also gives the user a real-time estimate of the risk of exposure to dengue in proximity to their home and has an educational component that provides information on relevant preventive measures. Both applications utilize a new mosquito abundance measure-the mosquito perception index (MPI)-as reported by the user. These data streams will feed into the EWARS model to generate dynamic risk maps that can guide resource optimization and strengthen disease surveillance, prevention, and response. It is anticipated that such an approach can assist in addressing gaps in the current system of dengue surveillance and control in India.

Bone density and microarchitecture in hepatitis C and HIV-coinfected postmenopausal minority women

We found that HIV+/HCV+ women had 7-8% lower areal bone mineral density (aBMD) by dual-energy x-ray absorptiometry (DXA) at the spine, hip, and radius (p < 0.01) and 5-7% lower volumetric BMD (vBMD) by central quantitative computed tomography (cQCT) at the spine and hip (p < 0.05). These data suggest that true deficits in vBMD may contribute to bone fragility and excess fractures reported in HIV+/HCV+ women.

INTRODUCTION

aBMD by DXA is lower in persons coinfected with HIV and HCV (HIV+/HCV+) than with HIV monoinfection (HIV+). However, weight is often also lower with HCV infection, and measurement of aBMD by DXA can be confounded by adiposity; we aimed to determine whether true vBMD is also lower in HIV+/HCV+ coinfection.

METHODS

We measured aBMD of the lumbar spine (LS), total hip (TH), femoral neck (FN), and ultradistal radius (UDR) by DXA and vBMD of the spine and hip by cQCT and of the distal radius and tibia by high-resolution peripheral QCT (HRpQCT) in 37 HIV+/HCV+ and 119 HIV+ postmenopausal women. Groups were compared using Student's t tests with covariate adjustment by multiple regression analysis.

RESULTS

HIV+/HCV+ and HIV+ women were of similar age and race/ethnicity. HIV+/HCV+ women had lower body mass index (BMI) and trunk fat and were more likely to smoke and less likely to have a history of AIDS. In HIV+/HCV+ women, aBMD by DXA was 7-8% lower at the LS, TH, and UDR (p < 0.01). Similarly, vBMD by cQCT was 5-7% lower at the LS and TH (p < 0.05). Between-group differences in LS aBMD and vBMD remained significant after adjustment for BMI, smoking, and AIDS history. Tibial total vBMD by HRpQCT was 10% lower in HIV+/HCV+ women.

CONCLUSION

HIV+/HCV+ postmenopausal women had significantly lower spine aBMD and vBMD. These deficits in vBMD may contribute to bone fragility and excess fractures reported in HIV+/HCV+ women.

Frailty in Postmenopausal African American and Hispanic HIV-Infected Women

Studies suggest frailty occurs earlier in HIV-infected individuals, but data in postmenopausal HIV-infected women are lacking. We assessed the prevalence of frailty and association with anthropometric measures in HIV-infected and uninfected postmenopausal women. Fried's frailty phenotype was measured in HIV-infected and uninfected Hispanic and African American postmenopausal women participating in a study of bone metabolism; fat and lean mass were measured by whole body dual energy x-ray absorptiometry (DXA). Multivariable logistic regression evaluated frailty risk factors. The study was conducted at Columbia University Medical Center between 2002 and 2007. The participants were 61 HIV-infected and 27 uninfected Hispanic and African American postmenopausal women. The study compared prevalence and predictors of frailty in HIV-infected and uninfected postmenopausal women. Prevalence of frailty tended to be higher among HIV-infected than uninfected controls (11.5% vs 0% p=0.07). Surprisingly, among HIV-infected women, total body fat, not lean mass, was associated with frailty in multivariate analysis. Higher prevalence of frailty in African American and Hispanic HIV-infected postmenopausal women (11.5%) was similar to the 11% prevalence reported in minority women who were 10 years older in the general population. Our data suggest that frailty occurs earlier in HIV-infected postmenopausal women, but larger longitudinal studies are necessary to confirm whether musculoskeletal aging is accelerated by HIV infection.

Increased Prevalence of Psychosis in Patients Who Get Admitted with Acute Myocardial Infarction with Worse Outcomes

Objective

To determine trends and impact on outcomes of acute myocardial infarction (AMI) in patients with pre-existing psychosis.

Background

While post-AMI psychosis has been extensively studied, contemporary studies including temporal trends on impact of pre-AMI Psychosis on AMI and post-AMI outcomes are lacking.

Methods

We used Nationwide Inpatient Sample (NIS) from Healthcare Cost and Utilization Project(HCUP) from 2002 to 2012. We identified AMI and psychosis as primary and secondary diagnosis respectively using validated International Classification of Diseases, 9th Revision, and Clinical Modification (ICD9CM) codes, and Cochrane-Armitage trend test and multivariate regression to generate adjusted odds ratios (aOR).

Results

We analyzed total of 7,174,274 AMI hospital admissions from 2002 to 2012 of which 1.77% had psychosis. Proportion of hospitalizations with psychosis increased from 6.94% to 11.85% (P-trend < 0.001). Utilization of percutaneous coronary intervention (PCI) was lower in patients with psychosis (29.98% vs. 40.36%, P < 0.001). Utilization of coronary artery bypass grafting (CABG) was lower in patients with psychosis (8.01% vs. 9.18%, P < 0.001). In-hospital mortality was significantly lower in patients with psychosis (aOR 0.677; 95% CI 0.630–0.727; P < 0.001) but discharge to specialty care higher (aOR 1.870; 95%CI 1.786–1.958; P < 0.001). In addition, median length of hospitalization (3.77 vs. 2.90 days; P < 0.001) was higher in hospitalizations with psychosis.

Conclusions

Our study displayed increasing proportion of patients with psychosis admitted due to AMI in last decade with lower mortality but higher morbidity post-infarction, and significantly less utilization of PCI and CABG. There was also increased length of stay patients with MDD. There is need to explore reasons behind this disparity in outcomes and PCI and CABG utilization to improve post-AMI outcomes in this vulnerable population.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

Increased Prevalence of Major Depressive Disorder in Patients who Get Admitted with Atrial Fibrillation with Worse Outcomes

Objective

To determine trends and impact on outcomes of atrial fibrillation (AF) in patients with pre-existing major depressive disorder(MDD).

Background

While post-AF MDD has been extensively studied, contemporary studies including temporal trends on impact of pre-AF MDD on AF and post-AF outcomes are lacking.

Methods

We used Nationwide Inpatient Sample (NIS) from Healthcare Cost and Utilization Project (HCUP) from 2002 to 2012. We identified AF and MDD as primary and secondary diagnosis respectively using validated International Classification of Diseases, 9th Revision, and Clinical Modification (ICD9CM) codes, and used Cochrane-Armitage trend test and multivariate regression to generate adjusted odds ratios (aOR).

Results

We analyzed total of 3,887,827 AF hospital admissions from 2002 to 2012 of which 6.78% had MDD. Proportion of hospitalizations with MDD increased from 4.93% to 14.19% (P-trend < 0.001). Utilization of atrial cardioversion was lower in patients with MDD (34.37% vs. 40.52%, P < 0.001). In-hospital mortality was significantly lower in patients with MDD (aOR0.749; 95% CI 0.664–0.846; P < 0.001) but discharge to specialty care was higher (aOR 1.695; 95%CI 1.650–1.741; P < 0.001). In addition, median length of hospitalization (2.5 vs. 2.13 days; P < 0.001) and median cost of hospitalization (28,246 vs. 22,663; P < 0.001) was higher in hospitalizations with MDD.

Conclusions

Our study displayed an increasing proportion of patients with MDD admitted due to AF in the last decade with lower mortality but higher morbidity post-AF. In addition, there was significantly less utilization of atrial cardioversion in this population along with higher median length and cost of hospitalization. There is a need to explore the reasons behind this disparity in outcomes and atrial cardioversion utilization in order to improve post-AF outcomes in this vulnerable population.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

Temporal Trends in Drug Abuse in Adults with Acute Myocardial Infarction Show Worse Outcomes

Objective

To determine temporal trends, invasive treatment utilization and impact on outcomes of pre-infarction drug abuse (DA) on acute myocardial infarction (AMI) in adults.

Background

DA is important risk factor for AMI. However, temporal trends in drug abuse on AMI hospitalization outcomes in adults are lacking.

Methods

We used Nationwide Inpatient Sample (NIS) from Healthcare Cost and Utilization Project (HCUP) from 2002 to 2012. We identified AMI and DA as primary and secondary diagnosis respectively using validated International Classification of Diseases, 9th Revision, and Clinical Modification (ICD9CM) codes, and used the CochraneArmitage trend test and multivariate regression to generate adjusted odds ratios (aOR).

Results

We analyzed total of 7,174,274 AMI hospital admissions from 2002 to 2012 of which 1.67% had DA. Proportion of hospitalizations with DA increased from 5.63% to 12.08% (P trend < 0.001). Utilization of coronary artery bypass grafting (CABG) was lower in patients with DA (7.83% vs. 9.18%, P < 0.001). In-hospital mortality was significantly lower in patients with DA (aOR 0.811; 95% CI 0.693–0.735; P < 0.001) but discharge to specialty care was higher (aOR 1.076; 95% CI 1.025–1.128; P < 0.001). The median cost of hospitalization (40,834 vs. 37,253; P < 0.001) was higher in hospitalizations with DA.

Conclusions

We demonstrate an increasing proportion of adults admitted with AMI have DA over the decade. However, DA has paradoxical association with mortality in adults. DA is associated with lower CABG utilization and higher discharge to specialty care, with a higher mean cost of hospitalization. The reasons for the paradoxical association of DA with mortality and worse morbidity outcomes need to be explored in greater detail.

Disclosure of interest

The authors have not supplied their declaration of competing interest.

An Interface Pressure Sensor for Routine Clinical Use

The art of fitting the environment to the patient is sadly lacking. There are at least 24 000 patients in Great Britain suffering from pressure sores. The art will not improve until relevant parameters of tissue viability are measured routinely wherever patients are cared for. Disorders of temperature and blood pressure were not understood until standard measurements were widely taken. What are the relevant parameters for disorders of tissue viability? The authors single out pressure and movement, and note that pressure recorded with time will also monitor movement. They offer their flanged 28 mm electro-pneumatic pressure sensor as a possible standard instrument for most clinical purposes whether research or routine.

The discussion covers the theoretical objections to interface pressure measurement, analyses the sources of error in their electro-pneumatic technique and compares its accuracy to that of other transducers.