Category: Statistics

Wound Manag Prev. 2024 Jun;70(2). doi: 10.25270/wmp.23028.

ABSTRACT

BACKGROUND: The management of chronic wounds presents a challenge for surgeons. In this pilot study, the authors established a novel auto-grafting approach for chronic wounds and evaluated its efficacy.

PURPOSE: The objective of this pilot study was to observe the clinical efficacy of granulation-embedded skin grafting for the treatment of chronic wounds at high altitudes.

METHODS: The data of 45 patients with chronic wounds were obtained from the medical records of the Yushu People’s Hospital. Patients were divided into stamp skin-grafting and granulation-embedded skin-grafting groups. Skin graft survival rate, wound coverage rate, and wound-healing time were observed and recorded. The length of hospital stay and 1% total body surface area (TBSA) treatment cost were compared.

RESULTS: Significant differences were noted in skin graft survival rate (94% ± 3% vs 86% ± 3%, P < .01), wound coverage rate on postoperative day 7 (61% ± 16% vs 54% ± 18%, P < .01), and wound-healing times (23 ± 2.52 days vs 31 ± 3.61 days, P < .05). The length of hospital stay and 1% TBSA treatment cost were significantly reduced in the granulation-embedded skin grafting group (P < .05).

CONCLUSIONS: Granulation-embedded skin grafting can improve the healing of chronic wounds at high altitudes. These findings provide a new approach to the clinical treatment of chronic wounds.

PMID:38959346 | DOI:10.25270/wmp.23028

Wound Manag Prev. 2024 Jun;70(2). doi: 10.25270/wmp.23037.

ABSTRACT

BACKGROUND: Operating room-acquired pressure injury (PI) is defined as PI that develops within the first 48 to 72 hours after surgery.

PURPOSE: To determine the incidence and risk factors of operating room-acquired PI.

METHODS: This descriptive cross-sectional study was conducted at a university hospital in Turkey between May 20, 2021, and December 20, 2021, and included 309 patients who met the inclusion criteria. The study was reported based on the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) checklist for cross-sectional studies.

RESULTS: Operating room-acquired PI developed in 5.8% of the patients in this study. Moreover, 54.4% of the patients had medical devices, and medical device-acquired PI occurred in 4.2% of these patients (7/168). Patient age, hemodynamic parameters, and albumin level, as well as duration of surgery, were found to affect the development of operating room-acquired PI.

CONCLUSION: Surgical nurses are responsible for both recognizing situations that may result in perioperative PI and taking necessary precautions. It is recommended that nurses identify existing and potential preoperative, intraoperative, and postoperative risks that impair skin integrity and affect tissue oxygenation to reduce the risk of operating room-acquired PI.

PMID:38959344 | DOI:10.25270/wmp.23037

Wound Manag Prev. 2024 Jun;70(2). doi: 10.25270/wmp.22081.

ABSTRACT

BACKGROUND: CSG dressing is water-soluble and helps to hydrate the wound, control exudate, and provide gentle debridement by virtue of a high concentration of surfactant micelles. The primary objective of this retrospective case series is to report on the feasibility of CSG use in pediatric wounds and its mechanism of action. The secondary aim was to measure pain during application and removal of CSG.

METHODS: Eight pediatric patients ranging in age from newborn to a few months old with wounds requiring medical intervention were treated with CSG. The CSG dressing was applied twice daily at initiation of treatment in some patients, but mostly once daily. NIPS was utilized for pain measurements.

RESULTS: Near-complete healing of wounds was observed by the end of treatment duration, which was only a few days. The calm temperament of these patients during dressing changes and objective NIPS suggested minimal to no pain. None of the patients experienced any adverse events related to the use of this dressing.

CONCLUSION: The CSG dressing could be the dressing of choice in this population to enhance debridement and maintain moist healing and support granulation, either proactively or if other treatments fail.

PMID:38959343 | DOI:10.25270/wmp.22081

Proc Natl Acad Sci U S A. 2024 Jul 9;121(28):e2306800121. doi: 10.1073/pnas.2306800121. Epub 2024 Jul 3.

ABSTRACT

Understanding the genesis of shared trial-to-trial variability in neuronal population activity within the sensory cortex is critical to uncovering the biological basis of information processing in the brain. Shared variability is often a reflection of the structure of cortical connectivity since it likely arises, in part, from local circuit inputs. A series of experiments from segregated networks of (excitatory) pyramidal neurons in the mouse primary visual cortex challenge this view. Specifically, the across-network correlations were found to be larger than predicted given the known weak cross-network connectivity. We aim to uncover the circuit mechanisms responsible for these enhanced correlations through biologically motivated cortical circuit models. Our central finding is that coupling each excitatory subpopulation with a specific inhibitory subpopulation provides the most robust network-intrinsic solution in shaping these enhanced correlations. This result argues for the existence of excitatory-inhibitory functional assemblies in early sensory areas which mirror not just response properties but also connectivity between pyramidal cells. Furthermore, our findings provide theoretical support for recent experimental observations showing that cortical inhibition forms structural and functional subnetworks with excitatory cells, in contrast to the classical view that inhibition is a nonspecific blanket suppression of local excitation.

PMID:38959037 | DOI:10.1073/pnas.2306800121

JAMA Surg. 2024 Jul 3. doi: 10.1001/jamasurg.2024.2162. Online ahead of print.

ABSTRACT

IMPORTANCE: Roux-en-Y gastric bypass (RYGB) is associated with reduced cardiovascular (CV) risk factors, morbidity, and mortality. Whether these effects are specifically induced by the surgical procedure or the weight loss is unclear.

OBJECTIVE: To compare 6-week changes in CV risk factors in patients with obesity undergoing matching caloric restriction and weight loss by RYGB or a very low-energy diet (VLED).

DESIGN, SETTING, AND PARTICIPANTS: This nonrandomized controlled study (Impact of Body Weight, Low Calorie Diet, and Gastric Bypass on Drug Bioavailability, Cardiovascular Risk Factors, and Metabolic Biomarkers [COCKTAIL]) was conducted at a tertiary care obesity center in Norway. Participants were individuals with severe obesity preparing for RYGB or a VLED. Recruitment began February 26, 2015; the first patient visit was on March 18, 2015, and the last patient visit (9-week follow-up) was on August 9, 2017. Data were analyzed from April 30, 2021, through June 29, 2023.

INTERVENTIONS: VLED alone for 6 weeks or VLED for 6 weeks after RYGB; both interventions were preceded by 3-week LED.

MAIN OUTCOMES AND MEASURES: Between-group comparisons of 6-week changes in CV risk factors.

RESULTS: Among 78 patients included in the analyses, the mean (SD) age was 47.5 (9.7) years; 51 (65%) were women, and 27 (35%) were men. Except for a slightly higher mean (SD) body mass index of 44.5 (6.2) in the RYGB group (n = 41) vs 41.9 (5.4) in the VLED group (n = 37), baseline demographic and clinical characteristics were similar between groups. Major atherogenic blood lipids (low-density lipoprotein cholesterol, non-high-density lipoprotein cholesterol, apolipoprotein B, lipoprotein[a]) were reduced after RYGB in comparison with VLED despite a similar fat mass loss. Mean between-group differences were -17.7 mg/dL (95% CI, -27.9 to -7.5), -17.4 mg/dL (95% CI, -29.8 to -5.0) mg/dL, -9.94 mg/dL (95% CI, -15.75 to -4.14), and geometric mean ratio was 0.55 U/L (95% CI, 0.42 to 0.72), respectively. Changes in glycemic control and blood pressure were similar between groups.

CONCLUSIONS AND RELEVANCE: This study found that clinically meaningful reductions in major atherogenic blood lipids were demonstrated after RYGB, indicating that RYGB may reduce CV risk independent of weight loss.

TRIAL REGISTRATION: ClinicalTrials.gov Identifier: NCT02386917.

PMID:38959017 | DOI:10.1001/jamasurg.2024.2162

JAMA Oncol. 2024 Jul 3. doi: 10.1001/jamaoncol.2024.1930. Online ahead of print.

ABSTRACT

IMPORTANCE: Pancreatic ductal adenocarcinoma (PDAC) is a deadly disease with increasing incidence. The majority of PDACs are incurable at presentation, but population-based screening is not recommended. Surveillance of high-risk individuals for PDAC may lead to early detection, but the survival benefit is unproven.

OBJECTIVE: To compare the survival of patients with surveillance-detected PDAC with US national data.

DESIGN, SETTING, AND PARTICIPANTS: This comparative cohort study was conducted in multiple US academic medical centers participating in the Cancer of the Pancreas Screening program, which screens high-risk individuals with a familial or genetic predisposition for PDAC. The comparison cohort comprised patients with PDAC matched for age, sex, and year of diagnosis from the Surveillance, Epidemiology, and End Results (SEER) program. The Cancer of the Pancreas Screening program originated in 1998, and data collection was done through 2021. The data analysis was performed from April 29, 2022, through April 10, 2023.

EXPOSURES: Endoscopic ultrasonography or magnetic resonance imaging performed annually and standard-of-care surgical and/or oncologic treatment.

MAIN OUTCOMES AND MEASURES: Stage of PDAC at diagnosis, overall survival (OS), and PDAC mortality were compared using descriptive statistics and conditional logistic regression, Cox proportional hazards regression, and competing risk regression models. Sensitivity analyses and adjustment for lead-time bias were also conducted.

RESULTS: A total of 26 high-risk individuals (mean [SD] age at diagnosis, 65.8 [9.5] years; 15 female [57.7%]) with PDAC were compared with 1504 SEER control patients with PDAC (mean [SD] age at diagnosis, 66.8 [7.9] years; 771 female [51.3%]). The median primary tumor diameter of the 26 high-risk individuals was smaller than in the control patients (2.5 [range, 0.6-5.0] vs 3.6 [range, 0.2-8.0] cm, respectively; P < .001). The high-risk individuals were more likely to be diagnosed with a lower stage (stage I, 10 [38.5%]; stage II, 8 [30.8%]) than matched control patients (stage I, 155 [10.3%]; stage II, 377 [25.1%]; P < .001). The PDAC mortality rate at 5 years was lower for high-risk individuals than control patients (43% vs 86%; hazard ratio, 3.58; 95% CI, 2.01-6.39; P < .001), and high-risk individuals lived longer than matched control patients (median OS, 61.7 [range, 1.9-147.3] vs 8.0 [range, 1.0-131.0] months; 5-year OS rate, 50% [95% CI, 32%-80%] vs 9% [95% CI, 7%-11%]).

CONCLUSIONS AND RELEVANCE: These findings suggest that surveillance of high-risk individuals may lead to detection of smaller, lower-stage PDACs and improved survival.

PMID:38959011 | DOI:10.1001/jamaoncol.2024.1930

JAMA Psychiatry. 2024 Jul 3. doi: 10.1001/jamapsychiatry.2024.1687. Online ahead of print.

ABSTRACT

IMPORTANCE: Supporting healthy aging is a US public health priority, and gratitude is a potentially modifiable psychological factor that may enhance health and well-being in older adults. However, the association between gratitude and mortality has not been studied.

OBJECTIVE: To examine the association of gratitude with all-cause and cause-specific mortality in later life.

DESIGN, SETTING, AND PARTICIPANTS: This population-based prospective cohort study used data from self-reported questionnaires and medical records of 49 275 US older female registered nurses who participated in the Nurses’ Health Study (2016 questionnaire wave to December 2019). Cox proportional hazards regression models estimated the hazard ratio (HR) of deaths by self-reported levels of gratitude at baseline. These models adjusted for baseline sociodemographic characteristics, social participation, physical health, lifestyle factors, cognitive function, and mental health. Data analysis was conducted from December 2022 to April 2024.

EXPOSURE: Gratitude was assessed with the 6-item Gratitude Questionnaire, a validated and widely used measure of one’s tendency to experience grateful affect.

MAIN OUTCOMES AND MEASURES: Deaths were identified from the National Death Index, state statistics records, reports by next of kin, and the postal system. Causes of death were ascertained by physicians through reviewing death certificates and medical records.

RESULTS: Among the 49 275 participants (all female; mean [SD] age at baseline, 79 [6.16] years), 4608 incident deaths were identified over 151 496 person-years of follow-up. Greater gratitude at baseline was associated with a lower hazard of mortality in a monotonic fashion. For instance, the highest tertile of gratitude, compared with the lowest tertile, was associated with a lower hazard of all-cause deaths (HR, 0.91; 95% CI, 0.84-0.99) after adjusting for baseline sociodemographic characteristics, social participation, religious involvement, physical health, lifestyle factors, cognitive function, and mental health. When considering cause-specific deaths, death from cardiovascular disease was inversely associated with gratitude (HR, 0.85; 95% CI, 0.73-0.995).

CONCLUSIONS AND RELEVANCE: This study provides the first empirical evidence suggesting that experiencing grateful affect is associated with increased longevity among older adults. The findings will need to be replicated in future studies with more representative samples.

PMID:38959002 | DOI:10.1001/jamapsychiatry.2024.1687

Ultrasound Q. 2024 Jul 3;40(3):e00683. doi: 10.1097/RUQ.0000000000000683. eCollection 2024 Sep 1.

ABSTRACT

The objective of the study was to use a deep learning model to differentiate between benign and malignant sentinel lymph nodes (SLNs) in patients with breast cancer compared to radiologists’ assessments.Seventy-nine women with breast cancer were enrolled and underwent lymphosonography and contrast-enhanced ultrasound (CEUS) examination after subcutaneous injection of ultrasound contrast agent around their tumor to identify SLNs. Google AutoML was used to develop image classification model. Grayscale and CEUS images acquired during the ultrasound examination were uploaded with a data distribution of 80% for training/20% for testing. The performance metric used was area under precision/recall curve (AuPRC). In addition, 3 radiologists assessed SLNs as normal or abnormal based on a clinical established classification. Two-hundred seventeen SLNs were divided in 2 for model development; model 1 included all SLNs and model 2 had an equal number of benign and malignant SLNs. Validation results model 1 AuPRC 0.84 (grayscale)/0.91 (CEUS) and model 2 AuPRC 0.91 (grayscale)/0.87 (CEUS). The comparison between artificial intelligence (AI) and readers’ showed statistical significant differences between all models and ultrasound modes; model 1 grayscale AI versus readers, P = 0.047, and model 1 CEUS AI versus readers, P < 0.001. Model 2 r grayscale AI versus readers, P = 0.032, and model 2 CEUS AI versus readers, P = 0.041.The interreader agreement overall result showed κ values of 0.20 for grayscale and 0.17 for CEUS.In conclusion, AutoML showed improved diagnostic performance in balance volume datasets. Radiologist performance was not influenced by the dataset’s distribution.

PMID:38958999 | DOI:10.1097/RUQ.0000000000000683

JAMA Netw Open. 2024 Jul 1;7(7):e2418686. doi: 10.1001/jamanetworkopen.2024.18686.

NO ABSTRACT

PMID:38958982 | DOI:10.1001/jamanetworkopen.2024.18686

JAMA Netw Open. 2024 Jul 1;7(7):e2419979. doi: 10.1001/jamanetworkopen.2024.19979.

NO ABSTRACT

PMID:38958981 | DOI:10.1001/jamanetworkopen.2024.19979