Category: Statistics

Pediatr Surg Int. 2023 Nov 20;39(1):296. doi: 10.1007/s00383-023-05583-y.

ABSTRACT

PURPOSE: Lineage tracing is key to study the fate of individual cells and their progeny especially in developmental biology. To conduct these studies, we aimed to establish a reproducible model of CDH in the most commonly used genetic background strain that is C57BL/6J mice.

METHODS: CDH was induced in C57BL/6J dams by maternal administration of nitrofen + bisdiamine at E8.5. Fetuses from olive oil-gavaged mothers served as controls. Lungs from CDH and control fetuses were compared for (1) growth via radial airspace count (RAC), mean linear intercept (MLI) and gene expression for Fgf10, Nrp1, and Ctnnb1; (2) maturation (Pdpn, Spc, Ager, Abca3, Eln, Acta2, Pdgfra) via gene and protein expression; (3) vascularization via gene and protein expression (CD31, Vegfa, Vegfr1/2, Epas1, Enos).

STATISTICS: unpaired t-test or Mann-Whitney test.

RESULTS: Nitrofen + bisdiamine administration resulted in 36% left-sided CDH (31% mortality). CDH fetuses had hypoplastic lungs and impaired growth (lower RAC, higher MLI, lower Fgf10, Nrp1, Ctnnb1), maturation (decreased Pdpn, Ager, Eln gene expression), and vascularization (decreased Cd31, Vegfr1/2; Epas1 and Enos). Lower protein expression was confirmed for PDPN, ELN and CD31.

CONCLUSION: Modeling CDH in C57BL/6J mouse fetuses is effective in reproducing the classical CDH hallmarks. This model will be critical for lineage tracing experiments.

PMID:37981587 | DOI:10.1007/s00383-023-05583-y

Lasers Med Sci. 2023 Nov 20;38(1):266. doi: 10.1007/s10103-023-03901-3.

ABSTRACT

The purpose of this study is to evaluate the effects of high-intensity laser therapy (HILT) in patients with frozen shoulder. PRISMA guidelines were adhered to, and a systematic search was conducted in the PubMed, Web of Science, Scopus, CINAHL, Science Direct, and PEDro databases (last update: September 4, 2023; search period: December 2022-September 2023). The inclusion criteria encompassed RCTs comparing HILT with other physical therapy interventions in frozen patients with frozen shoulders, with or without sham HILT, assessing pain intensity, shoulder ROM, and disability outcomes. The quality of the RCTs was assessed with the Cochrane Risk of Bias tool, and evidence was assessed using the GRADE approach. Five trials met the eligibility criteria and were included in the review and meta-analysis, which pooled results from the visual analog scale (VAS), goniometry, and the shoulder pain and disability index (SPADI). Mean differences (MDs) for pain intensity and disability show a pooled effect in favor of HILT both for VAS (MD = – 2.23 cm, 95% CI: – 3.25, – 1.22) and SPADI (MD = – 10.1% (95% CI = – 16.5, – 3.7), changes that are statistical (p < 0.01) and clinical. The MD for flexion (MD = 9.0°; 95% CI: – 2.36°, 20.3°; p = 0.12), abduction (MD = 3.4°; 95% CI: – 6.9°, 13.7°; p = 0.51), and external rotation (MD = – 0.95°; 95% CI: – 5.36°, 3.5°; p = 0.67) does not show statistical and clinical differences between groups after treatment. PI and disability changes were graded as important due to their clinical and statistical results. HILT into a physical therapy plan reduce pain and disability, but it does not outperform conventional physical therapy in improving shoulder ROM. It is suggested that future RCTs compare the effects of HILT and LLLT to assess their possible differences in their analgesic effects.

PMID:37981583 | DOI:10.1007/s10103-023-03901-3

J Endovasc Ther. 2023 Nov 19:15266028231210214. doi: 10.1177/15266028231210214. Online ahead of print.

ABSTRACT

INTRODUCTION: This study aimed to evaluate the impact of COVID on total case load and peri-operative outcomes in patients undergoing open surgical repair (OSR) and endovascular repair (ER) of complex aortic aneurysms (cAAs).

METHODS: A single-center retrospective analysis of prospective data of patients managed with elective cAA ER or OSR from January 2018 to December 2021 was conducted. A comparative analysis on the impact of the COVID-19 pandemic on the case volume and on the 30-day outcomes was assessed using time periods, before (2018-2019) and during the pandemic (2020-2021).

RESULTS: During the 4-year study period, 255 patients with cAA were managed with ER and 576 with OSR. The pandemic did not reduce the cAA ER volume (p=0.12), but a statistically significant reduction in OSR case load was recorded (p=0.04). Following OSR, hospital length of stay (11.1 vs 10.3 days), and early mortality (6.94% vs 4.63%), were similar before and during the pandemic. In the ER cohort, baseline characteristics, early mortality (3.6% vs 4.1%, p=0.976), and morbidity (10% vs 14%, p=0.44), were comparable during the 2 periods. For ER cases, the hospital and intensive care unit (ICU) stay both decreased significantly (8±8-6±7 days, p<0.001 and 2±4 vs 1±6 days p=0.01, respectively) during the pandemic.

CONCLUSION: Resource pressures drove modifications in clinical practice to reduce the length of hospitalization, without compromising the clinical outcomes, in patients undergoing ER of cAA. This modification was not effective in patients undergoing OSR that resulted in a significant decrease of this activity.

CLINICAL IMPACT: The pandemic did not reduce complex endovascular repair (ER) volume (p=0.12) while a significant reduction in open surgical repair (OSR) case load was recorded (p=0.04). For the endovascular cohort, early mortality (p=0.976) and morbidity (p=0.44) remained stable, while the hospital and intensive care unit (ICU) stay decreased (p<0.001 and p=0.01, respectively) during the pandemic.

PMID:37981580 | DOI:10.1177/15266028231210214

Health Commun. 2023 Nov 19:1-13. doi: 10.1080/10410236.2023.2282833. Online ahead of print.

ABSTRACT

This study explored how social media users’ mocking of a public health campaign can affect other users’ emotions, cognitions, and behavioral intentions. Inspired by public mocking of the CDC’s “Say No to Raw Dough” campaign aiming to prevent food poisoning caused by eating raw flour-based products, this experiment (N = 681) employed a 2 (Public responses to a PSA: Mocking or serious) x 3 (Organizational response to public responses: Self-mocking, serious, or none) + 1 (control condition) design. Statistical tests revealed that user-generated mocking can lower intentions to avoid the health risk by decreasing perceptions of injunctive norms (that is, seeing others mock a public health campaign resulted in weaker perceptions that others think you should avoid the risky behavior). Mockery of a public health campaign also engender anger at the CDC and at other users, with the target of the anger having differential effects on intentions to avoid eating raw dough. Implications for theory and the practice of social media-based health promotion are discussed.

PMID:37981576 | DOI:10.1080/10410236.2023.2282833

Amyotroph Lateral Scler Frontotemporal Degener. 2023 Nov 19:1-5. doi: 10.1080/21678421.2023.2280618. Online ahead of print.

ABSTRACT

OBJECTIVE: We investigated non-motor symptoms in ALS using sequential questionnaires; here we report the findings of the second questionnaire.

METHODS: A social media platform (Twitter, now known as X) was used to publicize the questionnaires. Data were downloaded from SurveyMonkey and analyzed by descriptive statistics, comparison of means, and regression models.

RESULTS: There were 182 people with ALS and 57 controls. The most important non-motor symptoms were cold limbs (60.4% cases, 14% controls, p = 9.67 x 10^-10) and appetite loss (29.7% cases, 5.3% controls, p = 1.6 x 10^-4). The weaker limb was most likely to feel cold (p = 9.67 x 10^-10), and symptoms were more apparent in the evening and night. Appetite loss was reported as due to feeling full and the time taken to eat. People with ALS experienced medium-intensity pain, more usually shock-like pain than burning or cold-like pain, although the most prevalent type of pain was non-differentiated.

CONCLUSIONS: Non-motor symptoms are an important feature of ALS. Further investigation is needed to understand their physiological basis and whether they represent phenotypic differences useful for subtyping ALS.

PMID:37981575 | DOI:10.1080/21678421.2023.2280618

Surgery. 2023 Nov 17:S0039-6060(23)00745-6. doi: 10.1016/j.surg.2023.09.057. Online ahead of print.

ABSTRACT

BACKGROUND: Grant writing takes significant time and effort and often may be elusive, especially on a first attempt. After the rejection of a grant, many investigators face a dilemma regarding the best next steps. In this article, we discuss the options of revision versus resubmission and how to navigate these decisions.

METHODS: The literature was surveyed, including review articles, personal perspectives, and editorial pieces regarding the grant writing and funding processes. The National Institute of Health database was reviewed, and data were extrapolated from the past 10 years of funding percentages and rates of both R01 initial applications and resubmissions. Recommendations were then generated based on pertinent literature and experience from the authors.

RESULTS: The grant writing process involves many checkpoints between conception and funding. Only approximately 15% of R01 and R01-equivalent grants are accepted for funding on the initial submission. However, this statistic increases to >30% if the appropriate steps are taken to revise and resubmit the grant. These steps include consulting co-investigators, modifying hypotheses, drafting a succinct “Introduction” document, and many more. Knowing the options after the rejection of an original submission plays a huge role in the ultimate success of the grant.

CONCLUSION: Although receiving funding for an original grant can be difficult, with appropriate guidance, it may seem more feasible than initially expected. Adequately responding to the critiques of the grant and revising the grant appropriately can make or break the outcome of the grant.

PMID:37981550 | DOI:10.1016/j.surg.2023.09.057

J Pediatr Surg. 2023 Oct 28:S0022-3468(23)00666-8. doi: 10.1016/j.jpedsurg.2023.10.056. Online ahead of print.

ABSTRACT

INTRODUCTION: Few studies in the literature describe the Retrograde Intra-Renal Surgery (RIRS) outcome in preschool children. We evaluated the feasibility, stone-free rate and complications of RIRS in preschool children at two European tertiary care centres of Pediatric Urology.

MATERIAL AND METHODS: The retrospective study includes all children undergone RIRS for stones <25 mm from 2017 to 2022. Patients were divided into Group 1 <5 years (G1) and Group 2 >5 years (G2). Semirigid ureterorenoscope 4.5-6.5 Ch and a 7.5 Fr flexible ureteroscope with a 9.5/11 Ch ureteral access sheath (UAS) were used. Stone-free rate (SFR) was evaluated at 3 months. Fischer/Chi-square test for qualitative data and Mann-Whitney for quantitative data were used for statistical analysis.

RESULTS: 63 patients underwent RIRS, 19 G1-patients, median age 3.55 ± 1.06 years (range 1.5-5 years), and 44 G2-patients, median age 11.25 ± 2.95 (range 6-17 years) (p < 0.00001). Intraoperative complications occurred in 1 case in G1(5%) and 3 in G2(7%) (p = 1): two minor ureteric injuries in G2 were treated by a prolonged JJ-stent. Postoperative fever was reported in 3 cases in G1 (16%) and 4 in G2(9%) (p = 0.42), while post-operative hematuria in 4 G1-patients (21%) and in 7 G2-patients (16%) (p = 0.72). SFR was 84.2% in G1 and 88.6% in G2. At an average follow-up of 15.05 ± 4.83 months in G1 and 19.95 ± 10.36 months in G2, reintervention for residual stones was necessary in 3 cases in G1(16%) and in 6 cases in G2(14%) (p = 1).

CONCLUSIONS: In a European country with low-volume pediatric stone centers, RIRS is a promising therapeutic option in young children as it offers acceptable stone-free rate and a low incidence of high-grade complications.

LEVEL OF EVIDENCE: III.

PMID:37981541 | DOI:10.1016/j.jpedsurg.2023.10.056

Dent Mater. 2023 Nov 18:S0109-5641(23)00445-1. doi: 10.1016/j.dental.2023.11.005. Online ahead of print.

ABSTRACT

OBJECTIVE: to evaluate the effect a glass ionomer cement (GIC) containing hydroxyapatite (HAp) or calcium silicate (CaSi) particles on mineral content and mechanical properties of demineralized dentin. Ion release and compressive strength (CS) of the cements were also evaluated.

METHODS: GIC (Fuji 9 Gold Label, GC), GIC+ 5%HAp and GIC+ 5%CaSi (by mass) were evaluated. Ion release was determined by induced coupled plasma optical emission spectroscopy (Ca²⁺/Sr²⁺) or ion-specific electrode (F^–) (n = 3). A composite (Filtek Z250, 3 M ESPE) was used as control in remineralization tests. Demineralized dentin discs were kept in contact with materials in simulated body fluid (SBF) at 37 °C for eight weeks. Mineral:matrix ratio (MMR) was determined by ATR-FTIR spectroscopy (n = 5). Dentin hardness (H) and elastic modulus (E) were determined by nanoindentation (n = 10). CS was tested after 24 h and 7d in deionized water (n = 12). Data were analyzed by ANOVA/Tukey test (α = 0.05).

RESULTS: Ca²⁺ and Sr²⁺ release was higher for the modified materials (p < 0.05). Only GIC+ 5%HAp showed higher F^– release than the control (p < 0.05). All groups showed statistically significant increases in MMR, with no differences among them after 8 weeks (p > 0.05). No differences in dentin H or E were observed among groups (p > 0.05). HAp-modified GIC showed increased initial CS, while adding CaSi had the opposite effect (p < 0.05). After 7 days, GIC+ 5%CaSi presented lower CS in relation to control and GIC+ 5%HAp (p < 0.05).

SIGNIFICANCE: GIC modification with HAp or CaSi affected CS and increased ion release; however, none of the groups showed evidence of dentin remineralization in comparison to the negative control.

PMID:37981512 | DOI:10.1016/j.dental.2023.11.005

Burns. 2023 Oct 31:S0305-4179(23)00215-2. doi: 10.1016/j.burns.2023.10.014. Online ahead of print.

ABSTRACT

OBJECTIVES: Infection is still the leading cause of morbidity and mortality among burn patients worldwide. Isolation and identification of pediatric burn wound bacterial colonizers can prevent infection and improve burn trauma treatment. In this study, we explored early microbial colonizers within the burn wounds and the susceptibility of those isolates to antibiotics among hospitalized pediatric patients with minor and moderate burns, clinically significant infections and outcomes.

METHODS: A retrospective analysis of pediatric patients admitted to the inpatient pediatric surgical ward and treated for minor and moderate burns from 2009 to 2018 was performed.

RESULTS: One hundred six patients met the inclusion criteria. The mean age was 3.6 ± three years (0.2-14.1 years). The most common type of burn was scald burns (82.1%). The mean TBSA of the hospitalized pediatric burn cases was 8.5% (IQR, 6-12%). Seventy-nine (74.5%) patients had positive wound cultures at admission, regardless of the hospital admission day. Fifty-eight (73.4%) had one bacterial growth (mono isolate), while 21 (26.6%) had mixed growth or poly isolates. Among patients with mixed growth or poly isolate, 16 had two bacteria, three had three bacteria, and one had four bacteria isolated, totaling 105 isolated microorganisms (14 different species, 70.5% Gram-positive bacteria and 29.5% Gram-negative bacteria). Twelve patients (11%) developed clinically significant infections (eleven got burn wound infection, and one had septicemia). All patients received prophylactic systemic antibiotics. Only 35.2% of the isolated bacteria from the wounds were sensitive to the prophylactic antibiotics, and only ∼17% in case of clinically significant infections. We found a statistically significant difference in the length of hospital stay between patients with initially colonized samples of burn wounds compared with patients with initial negative samples (p = 0.008). All patients in the cohort survived hospital discharge.

CONCLUSION: Despite common bacterial colonization of acute burn wounds, only ∼10% of the patients developed clinically significant infections, a minority of which were sensitive to prophylactic antibiotics. Our findings indicate the need to refine the antibiotic approach in pediatric patients with minor/moderate burns in our local setting.

PMID:37981486 | DOI:10.1016/j.burns.2023.10.014

Burns. 2023 Nov 3:S0305-4179(23)00208-5. doi: 10.1016/j.burns.2023.10.007. Online ahead of print.

ABSTRACT

The COVID-19 pandemic had widespread effects on the healthcare system due to public health regulations and restrictions. The following study shares trends observed during these extraordinary circumstances to investigate the impact of the COVID-19 pandemic on the provision of pediatric burn care at an American-Burn-Association verified tertiary pediatric hospital in Ontario, Canada. Pediatric burn patient data for new burn patients between March 17^th, 2019, and March 17^th, 2021, was retrospectively extracted and two cohorts of patients were formed: pre-pandemic and pandemic, through which statistical analysis was performed. No significant changes in the number of admitted patients, age, and sex of patients were observed. However, a significant increase in fire/flame burns was observed during the pandemic period. Additionally, a decrease in follow-up care was observed while an increase in acute burn care (wound care and surgical interventions) was found for the pandemic cohort. Despite changes to hospital care facilities to maximize resources for COVID-19-related care, our findings demonstrate that burn care remained an essential service and significant reductions in patient volumes were not observed. Overall, this study will aid in future planning and management for the provision of pediatric burn resources during similar public health emergencies.

PMID:37981484 | DOI:10.1016/j.burns.2023.10.007