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1.
J Foot Ankle Surg ; 2023 Jul 25.
Article in English | MEDLINE | ID: mdl-37500051

ABSTRACT

Previous studies have demonstrated that timely podiatric surgery consultation results in positive patient outcomes. However, there are limited studies focused on readmission rates in teaching community hospitals. The primary aim of this study is to determine if consulting podiatric services was associated with lower 30-day readmission rates and impact on length of stay in patients with lower extremity wounds. The secondary aim was to investigate medical and socio-economic factors associated with better outcomes. This study was a cross-sectional descriptive study. A retrospective chart review utilizing the hospital's electronic medical record system identified patients with lower extremity wounds (based on ICD-10 codes) admitted between July 2018 and December 2020. The results showed a 3-fold decrease in 30-day readmission rates in patients with podiatric surgery consultation compared to patients without consultation with lower extremity wounds (4.2% vs 11.3%, p = .03). Multivariate regression models showed patients with gangrene (AOR = 7.61; p = .04) or osteomyelitis (AOR = 9.07; p = .013) had a higher likelihood of readmission than patients with venous ulcer (reference category) after controlling for podiatric consultation. Among the group of patients with podiatric consultation, earlier podiatric consultations resulted in decreased length of stay. This study identifies prior amputation history and lack of podiatric consultation increased 30-day readmission rates.

2.
Am J Otolaryngol ; 42(3): 102853, 2021.
Article in English | MEDLINE | ID: mdl-33460977

ABSTRACT

PURPOSE: To determine the utility and value of pre-operative imaging among the elderly population ≥70 y.o. with bilateral progressive sensorineural hearing loss undergoing cochlear implantation. MATERIALS AND METHODS: A retrospective, cross-sectional review was performed at a tertiary referral center between 2010 and 2018 including patients ≥70 y.o. with bilateral presbycusis who underwent preoperative imaging and cochlear implantation. Primary outcome was whether pre-operative imaging changed the surgeon's surgical plan such as side of implant or abort procedure entirely. Patient characteristics including age, sex, side of implant, imaging modality, whether imaging changed surgical plan, and surgical complications were reviewed. One-way analysis of variance with post-hoc tests using the Bonferroni and Fisher's exact test were used to examine differences between groups. Secondary outcome was cost of preoperative imaging. RESULTS: One hundred thirty-three patients (mean age 79.38 [5.51 SD]) who underwent a total of 142 surgical cases and 147 total scans. There were 92, 27, and 14 patients who underwent CT, MRI, or both, respectfully (n=133). Of the 142 implants that were placed, preoperative imaging did not reveal a contraindication to placing implant on one side over another. Total cost of imaging was $29,694. Estimated cost if 20% of cochlear implant eligible patients ≥70 y.o. underwent imaging is $7,763,490. CONCLUSION: Decreasing unnecessary preoperative imaging can potentially decrease cost in cochlear implantation. In this sample, preoperative imaging did not affect the surgeon's choice of which side to operate on. However, imaging may provide an anatomic roadmap and contribute to either surgical confidence or caution. With the increasing amount of cochlear implant eligible elderly adults, preoperative imaging needs to be more clearly defined in this unique population.


Subject(s)
Cochlea/diagnostic imaging , Cochlea/surgery , Cochlear Implantation/methods , Hearing Loss, Sensorineural/diagnostic imaging , Hearing Loss, Sensorineural/surgery , Magnetic Resonance Imaging/methods , Tomography, X-Ray Computed/methods , Age Factors , Aged , Aged, 80 and over , Cochlear Implantation/economics , Cross-Sectional Studies , Disease Progression , Female , Health Care Costs , Humans , Magnetic Resonance Imaging/economics , Male , Preoperative Period , Retrospective Studies , Tomography, X-Ray Computed/economics
3.
AIDS Care ; 32(10): 1333-1342, 2020 10.
Article in English | MEDLINE | ID: mdl-32008352

ABSTRACT

In the United States, youth aged 13-24 comprised approximately 21% of new HIV infections in 2017; 13% of these infections occurred among women, the majority of whom (86%) acquired HIV through heterosexual contact (Centers for Disease Control and Prevention. 2019a. HIV and youth. Retrieved from https://www.cdc.gov/hiv/group/age/youth/index.html, Centers for Disease Control and Prevention. 2019b. HIV among women. Retrieved from https://www.cdc.gov/hiv/group/gender/women/index.html). We fit and validated a developmentally appropriate empirical model of Connell's Theory of Gender and Power (Connell, R. W. 1987. Gender and power: Society, the person and sexual politics. Stanford, CA: Stanford University Press, Connell, R. W. 2013. Gender and power: Society, the person and sexual politics. Hoboken, NJ: John Wiley & Sons) in a sample of young women and assessed whether gendered powerlessness reflected a multidimensional higher-order latent factor, as the theory implies. Anonymous computer-assisted interviews were administered to at-risk, sexually active young women (N = 1,101). Factor analyses and structural equation modeling were used to determine the dimensionality of gendered powerlessness. Associations with condom use were examined to validate the model. We fit a three-component model of gendered powerlessness, but not a higher-order latent factor. We observed that high scores on two dimensions of gendered powerlessness - cathexis and sexual division of power - were associated with lower likelihood of condom use. Our three-component model helps elucidate the role that components of gendered powerlessness play in young women's health behaviors and underscores the need for measures tailored to young women at high risk of contracting HIV.


Subject(s)
HIV Infections , Power, Psychological , Sexual and Gender Minorities , Adolescent , Adult , Bayes Theorem , Condoms , Female , Humans , Sexual Behavior , Sexual Partners , Young Adult
4.
Am J Otolaryngol ; 41(6): 102650, 2020.
Article in English | MEDLINE | ID: mdl-32702572

ABSTRACT

PURPOSE: In the largest reported United States (U.S.) cohort of benign paroxysmal positional vertigo (BPPV), does the presence or absence of migraine correlate with increased associations of other factors? MATERIALS & METHODS: A retrospective chart review from a single U.S. neurotology center. Adult patients with BPPV from 2003 to 2017 classified into two groups: 1) with migraine; 2) without migraine. RESULTS: The prevalence of self-reported migraine history in a BPPV-positive population (n = 1481) was 25.8% (n = 382). Among those with BPPV and migraine, 88.5% were female, 8.1% had diabetes, 22.5% had prior history of BPPV, 8.9% had Meniere's disease and recurrence rate was 38.3%. No statistically significant differences between recurrence or resolution rates between the two groups were demonstrated (p > 0.05). Adjusted logistic regression model found that women and those with a prior history of BPPV had significantly higher odds of having both BPPV and migraine conditions compared to their counterparts. In contrast, older age and diabetes were associated with significantly lower odds of concomitant BPPV and migraine. CONCLUSIONS: The prevalence of migraine among the study sample was 25.8%. Female gender, prior history of BPPV, younger age, and lack of diabetes were independently associated with the concurrent comorbidity of BPPV and migraine. These data further substantiate previously reported rates (from smaller studies); and, demonstrate that recurrence and resolution rates are not worse in those with BPPV and migraine compared to the general BPPV population. Findings support an association between migraine and BPPV and enhances one's ability to accurately counsel patients regarding these diseases.


Subject(s)
Benign Paroxysmal Positional Vertigo/epidemiology , Migraine Disorders/epidemiology , Age Factors , Cohort Studies , Comorbidity , Counseling , Diabetes Mellitus/epidemiology , Female , Humans , Male , Meniere Disease/epidemiology , Prevalence , Recurrence , Retrospective Studies , Sex Factors , United States/epidemiology
5.
Sex Transm Dis ; 45(8): 542-548, 2018 08.
Article in English | MEDLINE | ID: mdl-29466279

ABSTRACT

BACKGROUND: Despite the large body of extant literature on sexually transmitted infections (STIs) in adolescents and young adults (AYAs), more research on social and environmental contextual factors is needed. Also, further examination of STI indicators by gender remains a critical area of research focus. METHODS: Anonymous survey data were collected using audio computer-assisted self-interviews in community venues in urban, low-income, STI prevalent, US neighborhoods to reach AYAs, aged 12 to 24 years. Conventional descriptive statistics, bivariate analysis, and multiple logistical regression models were used to assess indicators of a self-reported lifetime prevalence of STIs. RESULTS: Participants (N = 1540) were on average 20.6 years; 57.2% were women, the majority were racial and ethnic minorities (92%), and almost half (49.2%) identified as sexual minorities. Nearly one third (32.%) had 1 or more STIs. As expected, gender differences were identified. For AYA men, being African American/Black, moving residences more than 4 times since kindergarten, and having a history of human immunodeficiency virus testing were each positively associated with STIs. Also, those who strongly disagreed that many young people in their community exchanged sex for money had a significantly lower likelihood of having an STI. For AYA women, exchanging sex for drugs or money, lacking money, which prevented activities, and using marijuana were each associated with STIs. CONCLUSIONS: This research extends our understanding of social and environmental contextual influences on AYAs' risk for STIs. It highlights differences in risk exposures that are distinctly different for AYA women and men, suggesting the need for tailored interventions to address their unique economic needs and social challenges.


Subject(s)
HIV Infections/epidemiology , Sexual Behavior , Sexually Transmitted Diseases/epidemiology , Adolescent , Black or African American , Child , Female , Homosexuality, Male , Humans , Logistic Models , Male , Prevalence , Self Report , Sex Factors , Sexual Partners , Sexual and Gender Minorities , Social Class , Transgender Persons , Young Adult
6.
Alcohol Clin Exp Res ; 42(3): 500-507, 2018 Mar.
Article in English | MEDLINE | ID: mdl-29281858

ABSTRACT

BACKGROUND: Phosphatidylethanol (PEth) is a direct biomarker for alcohol that is formed shortly after alcohol use and may remain detectable in blood for weeks after alcohol consumption. There is little research on alcohol use factors that influence PEth elimination, especially among women. METHODS: Data were collected from 116 alcohol use-disordered women who were recently incarcerated. We used a 2-part model with logistic and linear components to examine whether alcohol consumption in the 2 weeks prior to incarceration and days since last alcoholic drink (operationalized as abstinence days prior to incarceration + days incarcerated) were associated with PEth detectability (>8 ng/ml) and level (ng/ml) in blood. RESULTS: Participants reported drinking an average of 10 drinks per day in the 2 weeks prior to incarceration. Days since last drink was negatively associated with PEth level (odds ratio [OR] = 0.97, 95% confidence interval [CI] = 0.93; 0.99) and being PEth detectable (OR = 0.96, 95% CI = 0.91; 0.99). Quantity of alcohol consumed prior to jail admission was associated with PEth detection (OR = 1.08; 95% CI = 1.03; 1.16), but not PEth level. CONCLUSIONS: Days since last alcoholic drink and drinks per day both influenced PEth detectability, but only days since last drink predicted PEth level among a large sample of women with alcohol use disorder in the criminal justice system.


Subject(s)
Alcohol Abstinence , Alcohol Drinking/blood , Glycerophospholipids/blood , Prisons , Adolescent , Adult , Female , Humans , Linear Models , Logistic Models , Middle Aged , Odds Ratio , Young Adult
7.
AIDS Behav ; 22(2): 522-530, 2018 02.
Article in English | MEDLINE | ID: mdl-29214408

ABSTRACT

Young gay, bisexual and other men who have sex with men (YGBMSM) and young transgender women are disproportionately affected by HIV/AIDS. The success of biomedical prevention strategies is predicated on regular HIV testing; however, there has been limited uptake of testing among YGBMSM and young transgender women. Anticipated HIV stigma-expecting rejection as a result of seroconversion- may serve as a significant barrier to testing. A cross-sectional sample of YGBMSM (n = 719, 95.5%) and young transgender women (n = 33, 4.4%) ages 15-24 were recruited to participate in a one-time survey. Approximately one-third of youth had not tested within the last 6 months. In a multivariable model, anticipated HIV stigma and reporting a non-gay identity were associated with an increased odds of delaying regular HIV testing. Future research and interventions are warranted to address HIV stigma, in order to increase regular HIV testing among YGBMSM and transgender women.


Subject(s)
AIDS Serodiagnosis/methods , Bisexuality/physiology , Delayed Diagnosis , HIV Infections/diagnosis , Homosexuality, Male/psychology , Social Stigma , Transgender Persons/psychology , Transsexualism/psychology , Adolescent , Adult , Attitude to Health , Cross-Sectional Studies , Female , HIV Infections/psychology , Homosexuality, Male/statistics & numerical data , Humans , Male , Mass Screening , Serologic Tests , Sexual Behavior , Transgender Persons/statistics & numerical data , Young Adult
8.
AIDS Behav ; 22(11): 3451-3467, 2018 Nov.
Article in English | MEDLINE | ID: mdl-29340914

ABSTRACT

We proposed a multilevel model of structural influences on HIV-risky sexual partnerships in a diverse sample of 1793 youth residing in 23 states and the District of Columbia. We examined the influence of concentrated disadvantage, HIV stigma, and sexual and gender minority stigma on engagement in HIV risky sexual partnerships and whether youth's participation in opportunity structures, anticipation of HIV stigma, and perceptions of their community as youth-supportive settings mediated structural effects. After controlling for age, HIV status, and race, we found structural HIV stigma had deleterious indirect effects on youth's participation in HIV-risky sexual partnerships. Concentrated disadvantage and structural sexual and gender minority stigma had direct negative effects on youth's perceptions of their communities as supportive and on their participation in prosocial activity. Support perceptions had direct, protective effects on avoidance of HIV-risky sexual partnerships. Structural stigma undermines youth's belief that their communities invest in their safety and well-being.


Subject(s)
HIV Infections/psychology , Sexual Behavior/psychology , Sexual Partners , Sexual and Gender Minorities/psychology , Social Stigma , Stress, Psychological , Adolescent , Female , Humans , Male , Multilevel Analysis , Social Support , United States
9.
Am J Addict ; 26(4): 395-399, 2017 Jun.
Article in English | MEDLINE | ID: mdl-28453912

ABSTRACT

BACKGROUND AND OBJECTIVES: Depression is common among persons with opioid use disorder. We examined the perceived need for depression treatment (PNDT) among opioid-dependent patients and the relationship of PNDT to depression screening result. METHODS: Between May and December 2015, we surveyed consecutive persons (n = 440) seeking inpatient opioid detoxification. We used the Patient Health Questionnaire-2 (PHQ-2) to screen for depression. To assess perceived need for depression services, participants were asked, "Do you believe you should be treated for depression?" Response options were recorded into four categories: "Not Depressed (ND)," "Perceive Need for Depression Treatment (PNDT)," "Depressed/Don't Want Treatment," and "Currently Treated." RESULTS: Participants' mean age was 32.3 (±8.7) years; 70.7% were male. Nearly two out of three persons screened positive for depression yet only 8.2% were being treated for depression prior to admission. Screening positive for depression was associated with a 2.95 (95%CI 1.82-4.81, p < .005) fold increase in the expected odds of PNDT. But nearly half of those depressed (48%) did not perceive the need for treatment. Approximately 40% of the participants (n = 177) perceived that they were not depressed; of these persons, 52% screened positive for depression. DISCUSSION AND CONCLUSIONS: Detoxification program staff should screen patients for depression, and if a clinical diagnosis is confirmed, discuss treatment options, exploring the level of interest in mental health treatment for depression. SCIENTIFIC SIGNIFICANCE: Screening for and addressing depression, including patients' interest in treatment, should be central to post-detoxification aftercare planning. (Am J Addict 2017;26:395-399).


Subject(s)
Depression/psychology , Health Knowledge, Attitudes, Practice , Inpatients/psychology , Opioid-Related Disorders/psychology , Adult , Female , Humans , Male , Mental Health Services , Psychotherapy , Surveys and Questionnaires , Young Adult
10.
Otolaryngol Head Neck Surg ; 170(5): 1296-1306, 2024 May.
Article in English | MEDLINE | ID: mdl-38156529

ABSTRACT

OBJECTIVE: Olfactory dysfunction has gained considerable interest with its association to the coronavirus pandemic. Due to the limited literature on olfactory-related adverse events (ORAE) associated with medications, this study investigated ORAE reported in the Food and Drug Administration Adverse Event Reporting System (FAERS) to identify the most frequent medications associated with these reactions. STUDY DESIGN: Cross-sectional analysis SETTING: FAERS database. METHODS: The FAERS database was accessed to obtain ORAEs from 2012 to 2022. Disproportionality analysis was conducted by calculating the proportional reporting ratios (PRR) and reporting odds ratio (ROR) for anosmia, parosmia, hyposmia, and olfactory dysfunction. A PRR > 2 or ROR > 1 was significant. A multivariate logistical model was used to estimate adjusted ROR for gender and country of origin. RESULTS: Our final study population consisted of 1111 cases with the following symptoms: anosmia (672), parosmia (364), hyposmia (71), and olfactory dysfunction (4). The most significant ROR signal scores were found for secukinumab (3.42; 95% confidence interval, CI [1.9, 4.01]) for anosmia, levofloxacin (8.86; 95% CI [2.83, 9.8]) for hyposmia, and pregabalin (6.88; 95% CI [2.23, 8.01]) for parosmia. No significant PRR signal scores were found for anosmia, but significant signals were found for citalopram hydrobromide (17.25; 95% CI [17.01, 17.49]) in hyposmia, and dimethyl fumarate (3.18; 95% CI [3.09, 3.27]) in parosmia. No valid PRR or ROR values were found for olfactory dysfunction. Multivariate analysis did not reveal statistically significant differences between genders for any symptoms, but individuals from non-US countries did exhibit statistically significant elevated risk of anosmia (1.3 (95% CI [1.01, 1.68]). CONCLUSION: Pharmacovigilance studies provide an opportunity to evaluate the safety profile of medications regarding ORAE, particularly for those commonly prescribed for sinonasal symptoms. Findings from this study may function as a resource for prescribers and patients.


Subject(s)
Adverse Drug Reaction Reporting Systems , Olfaction Disorders , United States Food and Drug Administration , Humans , Male , Cross-Sectional Studies , Female , United States/epidemiology , Olfaction Disorders/chemically induced , Olfaction Disorders/epidemiology , Middle Aged , Adult , Aged , COVID-19/epidemiology , Drug-Related Side Effects and Adverse Reactions/epidemiology
11.
Cureus ; 15(6): e40540, 2023 Jun.
Article in English | MEDLINE | ID: mdl-37465816

ABSTRACT

OBJECTIVES: Colorectal cancer (CRC) incidence and mortality rates are increasing in low- and middle-income countries (LMIC), including North and Central Asian countries (NCAC). Screening and risk factor reduction can aid in the prevention of colorectal cancer, but communities lack awareness of these screening programs. The review assessed community awareness about CRC screening and prevention in NCAC to facilitate cancer control policies. Study type and methods: For this scoping review, we searched PubMed/Medline, Embase, and the Cochrane Library for articles on community awareness about CRC screening and prevention in NCAC according to inclusion and exclusion criteria. RESULTS: Eight of 677 articles from five of the 15 NCAC countries met the criteria. Most of the studies utilized a survey design. The results indicated low awareness of the availability of CRC screening and poor knowledge of CRC symptoms. Knowledge of CRC screening modalities was also inadequate. Some countries also lack CRC screening programs. CONCLUSION: Community unawareness is a significant barrier to screening program utilization and sustenance. Community health awareness programs (CHAP) are needed to improve the uptake of CRC screening in NCAC. The NCAC should include CHAP as an integral component of the CRC control plan. Long-term cancer control in LMIC could be adapted using the step-ladder pyramidal approach.

12.
Article in English | MEDLINE | ID: mdl-37134192

ABSTRACT

INTRODUCTION: Hip fractures in geriatric populations constitute a heavy burden on the healthcare system. The study goal was to identify patient, hospital, and surgical factors associated with hospital length of stay (LOS) for geriatric patients with hip fractures requiring surgical intervention in a community hospital setting. METHODS: This was a cross-sectional retrospective chart review of geriatric hip fractures that underwent surgical fixation at a community hospital between 2017 and 2019. The scope of the surgeries was limited to cephalomedullary device fixation or hemiarthroplasty hip fracture surgeries. Sliding hip screw or total hip arthroplasty procedures and patients who died during the index hospitalization were excluded. Median tests were conducted to examine differences between the groups. Unadjusted and adjusted truncated negative binomial regression models were used to examine the factors associated with LOS. RESULTS: Bivariate analyses revealed results that the factors associated with a longer LOS were preoperative anemia (P = 0.029), blood transfusion (P = 0.022), and the number of days between admission and surgery (P = 0.001). The adjusted regression model results suggested that older patients, patients who underwent surgery more than one day after admission, current smokers, malnourished patients, patients with sepsis, and patients with a history of a thromboembolic event had statistically significant (P < 0.05) longer LOS. However, patients who live in institutions (nursing homes or assisted living) had a shorter LOS than those who live at home alone or with family (P < 0.05). DISCUSSION: Older adult patients who underwent surgery with a cephalomedullary device or hip hemiarthroplasty for a hip fracture and had preoperative anemia, postoperative blood transfusions, and increased days between admission and surgery had a longer LOS. Additional factors positively associated with a longer LOS included current smokers, malnourishment, admission with sepsis, and patients with a history of a thromboembolic event. Of interest, institutionalized patients had a shorter LOS than those living at home alone or with family.


Subject(s)
Anemia , Hip Fractures , Humans , Aged , Length of Stay , Hospitals, Community , Retrospective Studies , Cross-Sectional Studies , Hip Fractures/epidemiology , Hip Fractures/surgery
13.
Spartan Med Res J ; 8(1): 89371, 2023.
Article in English | MEDLINE | ID: mdl-38084335

ABSTRACT

INTRODUCTION: Despite the many studies conducted on the factors affecting mortality in patients with COVID-19, there is ongoing debate about the role of race as a risk factor. Several studies have reported a geographic and racial disparity in COVID-19 cases in Michigan. This study aimed to examine the characteristics of the 2020 first cohort of Intensive Care Unit (ICU) COVID-19 patients admitted to a community teaching hospital in Flint, Michigan, and to determine the factors associated with ICU mortality, including race. METHODS: This cross-sectional study included adult patients (≥ 18 years) with severe COVID-19 pneumonia admitted to the ICU between March and May 2020. Potential risk factors associated with ICU mortality included demographic characteristics, comorbidities, treatments, and complications. RESULTS: The study sample consisted of N = 48 patients, aged 24-85 years, (mean 59.7; SD = 12.8); 56.2% (n=27) were male and 51.1% (n=24) were Black adults. The mortality rate was 51.1%. Age (aOR 1.1, 95% CI [1.01, 1.20]; p =0.03), type 2 diabetes (aOR 5.7, 95% CI [1.2, 29.1]; p =0.03), and essential hypertension (aOR 6.2, 95% CI [1.1, 34.5]; p =0.04) were all found to have statistically significant independent associations with increased risk of ICU mortality in this study sample. On the other hand, race was not found to be associated with ICU mortality. CONCLUSIONS: These findings support the literature regarding the association of comorbid conditions, including type 2 diabetes and hypertension, with poorer outcomes in ICU hospitalized patients with severe COVID-19 pneumonia. This study provides insight into mortality of an ICU patient cohort earlier on during the COVID-19 pandemic in Flint, Michigan.

14.
Spartan Med Res J ; 7(2): 37707, 2022.
Article in English | MEDLINE | ID: mdl-36128029

ABSTRACT

INTRODUCTION: The Centers for Medicare & Medicaid Services (CMS) designed Hospital Quality Initiatives (HQI) to assure delivery of quality health care for institutions receiving Medicare payments. Like many teaching institutions, the SEP-1 compliance rates at McLaren Oakland in Pontiac fluctuated monthly and were not achieving institutional target expectations. METHODS: The project team designed a Sepsis Macro and a Sepsis Order Set in the electronic medical record system. The project team also implemented an educational initiative targeted at emergency medicine resident and attending physicians. The educational initiative instructed emergency medicine resident and attending physicians in the metrics measured in the SEP-1 bundle as well as how to properly use the newly designed Sepsis Macro and Sepsis Order Set. RESULTS: After implementation of the Sepsis Macro and Sepsis Order Set, the overall compliance with the SEP-1 bundle improved from 57% to 62%, above national averages and at the institutional target expectations. However, there were not statistically significant differences (p = 0.562) between the compliance rate before and after program implementation (Pre = 57% (SD = 0.27); 95% CI: 0.29 - 0.85); Post= 62% (SD = 0.11); 95% CI: 0.55 - 0.70). After program implementation the SEP-1 compliance rate was met in 82% of the months in comparison with 50% of the months in the pre-intervention (p = 0.28). CONCLUSIONS: Although not achieving statistical significance, this intervention demonstrated that simple, cost-effective measures of education and standardization in documentation and order entry in EMR's can improve clinically significant compliance to CMS HQI metrics in community-based teaching institutions.

15.
Nanomaterials (Basel) ; 11(9)2021 Aug 30.
Article in English | MEDLINE | ID: mdl-34578554

ABSTRACT

Nanocelluloses are very attractive materials for creating structured films with unique optical properties using different preparation techniques. Evaporation-induced self-assembly of cellulose nanocrystals (CNC) aqueous suspensions produces iridescent films with selective circular Bragg reflection. Blade coating of sonicated CNC suspensions leads to birefringent CNC films. In this work, fabrication of both birefringent and chiral films from non-sonicated CNC suspensions using a shear-coating method is studied. Polarization optical microscopy and steady-state viscosity profiles show that non-sonicated CNC suspensions (concentration of 6.5 wt%) evolve with storage time from a gel-like shear-thinning fluid to a mixture of isotropic and chiral nematic liquid crystalline phases. Shear-coated films prepared from non-sonicated fresh CNC suspensions are birefringent, whereas films prepared from suspensions stored several weeks show reflection of left-handed polarized light. Quantification of linear and circular birefringence as well circular dichroism in the films is achieved by using a Mueller matrix formalism.

16.
Adipocyte ; 10(1): 621-630, 2021 12.
Article in English | MEDLINE | ID: mdl-34747303

ABSTRACT

Quantitative methods for assessing differentiative potency of adipose-derived stem/stromal cells may lead to improved clinical application of this multipotent stem cell, by advancing our understanding of specific processes such as adipogenic differentiation. Conventional cell staining methods are used to determine the formation of adipose areas during adipogenesis as a qualitative representation of adipogenic potency. Staining methods such as oil-red-O are quantifiable using absorbance measurements, but these assays are time and material consuming. Detection methods for cell characteristics using advanced image analysis by machine learning are emerging. Here, live-cell imaging was combined with a deep learning-based detection tool to quantify the presence of adipose areas and lipid droplet formation during adipogenic differentiation of adipose-derived stem/stromal cells. Different detection masks quantified adipose area and lipid droplet formation at different time points indicating kinetics of adipogenesis and showed differences between individual donors. Whereas CEBPA and PPARG expression seems to precede the increase in adipose area and lipid droplets, it might be able to predict expression of ADIPOQ. The applied method is a proof of concept, demonstrating that deep learning methods can be used to investigate adipogenic differentiation and kinetics in vitro using specific detection masks based on algorithm produced from annotation of image data.


Subject(s)
Adipogenesis , Deep Learning , Adipose Tissue , Cell Differentiation , Cells, Cultured , Kinetics , Stromal Cells
17.
Vulnerable Child Youth Stud ; 13(2): 142-157, 2018.
Article in English | MEDLINE | ID: mdl-29623100

ABSTRACT

We assessed the relationships among HIV-related social and behavioral outcomes resulting from an adolescent-focused HIV structural change initiative in eight urban sites operating Connect to Protect (C2P) coalitions. Over a 4-year period, annual cross-sectional panels of adolescents (N = 2,248) completed an audio-computer-assisted interview, providing data on satisfaction with their communities as adolescent-supportive environments, internalized HIV stigma, lifetime HIV-testing, lifetime sexual risk-taking, and number of sexual partners in the prior year. We used structural equation modeling to estimate hypothesized links between time since coalition mobilization to our social and behavioral outcomes. Over the 4 years, adolescents perceived their communities to become more supportive (p < .05). Positive perceptions of community support were associated with lower lifetime HIV sexual risk (p < .05). The effect of time on risk behavior was mediated by perceptions of community support. Stigma was unchanged over time. Stigma had damaging effects on risk behavior, effects which were also mediated by perceptions of community support. Special efforts are needed to address the deleterious effect of HIV stigma on high-risk urban adolescents.

18.
J Nutr Gerontol Geriatr ; 34(1): 66-80, 2015.
Article in English | MEDLINE | ID: mdl-25803605

ABSTRACT

This study evaluated the impact of a four-session interactive nutrition education program-Eat Smart, Live Strong (ESLS)-on the consumption of fruit and vegetables by low-income older adults. A pre-post quasi-experimental design study was conducted with a longitudinal sample of 614 low-income Supplemental Nutrition Assistance Program (SNAP) participants and those eligible for SNAP, aged 60 to 80 years, in 17 intervention and 16 comparison senior centers in Michigan. The study compared participants' self-reports of their consumption of fruit and vegetables using a modified version of the University of California Cooperative Extension Food Behavior Checklist. ESLS increased participants' average daily consumption of fruit by 0.2 cups (P < 0.05) and vegetables by 0.31 cups (P < 0.01). ESLS, a four-session, cognitive-behavioral nutrition education program is an effective curriculum for helping low-income older adults eat more fruit and vegetables.


Subject(s)
Diet , Elder Nutritional Physiological Phenomena , Fruit , Motor Activity , Nutrition Policy , Patient Compliance , Vegetables , Aged , Aged, 80 and over , Diet/adverse effects , Diet/economics , Female , Food Assistance , Fruit/economics , Humans , Longitudinal Studies , Male , Michigan , Middle Aged , Nutritional Sciences/education , Patient Education as Topic , Poverty , United States , United States Department of Agriculture , Vegetables/economics
20.
Rev. MED ; 19(2): 207-216, jul.-dic. 2011. tab
Article in Spanish | LILACS | ID: lil-657117

ABSTRACT

Los adenomas son los tumores corticoadrenales más comunes, con una prevalencia del 4%, siendo los carcinomas corticoadrenales raros, con una incidencia de 1 caso por millón de habitantes. La mitad de estos carcinomas son funcionales con diagnósticos más tempranos por los síndromes de exceso de hormonas que producen, a diferencia del restante 50% que es silente, con hallazgo de metástasis al momento del diagnostico en más de la mitad de ellos. Pueden tener una presentación esporádica o hacer parte de síndromes de cáncer familiar con anormalidades en genes que resultan en un imbalance entre oncogenes y genes supresores de tumor; además de constituirse como potenciales marcadores diagnósticos, pronósticos y terapéuticos de esta enfermedad. Ante la sospecha de carcinoma de corteza suprarrenal, deben tenerse en cuenta criterios clínicos, bioquímicos y radiológicos para establecer adecuadamente el diagnóstico, el cual debe confirmarse por histología.


Adenomas are the most common adrenocortical tumors with a prevalence of 4%, being the adrenocortical carcinomas rare with an incidence of 1 case por million people. Half these carcinomas are functional, with earlier diagnoses due to the excessive hormonal syndromes they produce unlike the remaining 50% which are silent, with metastases being found upon the diagnosis in more than one half of them. They can have a sporadic presentation or make part of familiar cancer syndromes with genetic disturbances resulting in an imbalance between the oncogenes and the tumor suppressor genes, aside from becoming potential diagnostic, prognostic and therapeutic markers of this disease. In the presence of adrenocortical carcinoma, several clinical, biochemical and radiological criteria must be taken into account to properly establish the diagnosis which should be confirmed through histology.


Os adenomas são os tumores corticoadrenais mais comuns, com uma prevalência de 4%, sendo os adenocarcinomas corticoadrenais raros, com una incidência de 1 caso por milhão de habitantes. A metade destes carcinomas são funcionais com diagnósticos mais precoces pelas síndromes de excesso de hormônios que produzem, ao contrário do 50% restantes que é silente, com descobrimento de metástase no momento do diagnostico em mais da metade deles. Podem ter uma apresentação esporádica ou fazer parte de síndromes de câncer familiar com anormalidades em genes que resultam em um desequilíbrio entre oncogenes e genes supressores de tumor; além de constituir-se como potenciais marcadores diagnósticos, prognósticos e terapêuticos desta doença. Diante da suspeita de carcinoma do córtex suprarrenal, devem ser levados em consideração critérios clínicos, bioquímicos e radiológicos para estabelecer adequadamente o diagnóstico, que deve ser confirmado por histologia.


Subject(s)
Humans , Carcinoma , Pathology , Physiology , Therapeutics , Genetics
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