Tag: statistics

Can J Ophthalmol. 2023 Sep 2:S0008-4182(23)00251-X. doi: 10.1016/j.jcjo.2023.08.005. Online ahead of print.

ABSTRACT

OBJECTIVE: The purpose of this research is to report on real-world anti-vascular endothelial growth factor (anti-VEGF) treatment patterns in retinal vein occlusions (RVO).

DESIGN: Retrospective cohort study.

PARTICIPANTS: Treatment-naive RVO patients initiating anti-VEGF injections between 2015 and 2021.

METHODS: Medical records available until June 2022 were reviewed. Demographics, diagnosis, number of injections, treatment length, reason for discontinuation, and baseline and final data (e.g., date, age, best-corrected visual acuity [BCVA], and central subfield thickness) were recorded. Statistical analyses performed with STATA 17.0 assessed differences between baseline and final values, branch (BRVO) and central retinal vein occlusion (CRVO), and treatment-discontinuation subgroups.

RESULTS: A total of 219 treatment-naive eyes were included (70.3 ± 13.2 years of age, 52.5% female), with 99 BRVOs and 120 CRVOs (2482 injections). The discontinuation rate was 76.7% (168 of 219), with 72.7% of patients (77 of 99) with BRVOs and 75.8% of patients (91 of 120) with CRVOs discontinuing injections. Reasons for discontinuation included stable off active therapy (98 eyes), severe comorbidity or death (17 eyes), switched to intraocular steroid (implant or injection) (12 eyes), lack of visual benefit (10 eyes), ocular comorbidity (5 eyes), patient decision (5 eyes), and patient transfer (5 eyes). Among the remaining 67 eyes, 16 (24%) were lost to follow-up. Reasons for discontinuation differed between BRVO and CRVO patients (p = 0.002). Eyes with CRVO presented with worse BCVA (p < 0.0001) and achieved worse final BCVA (p < 0.0001), but both groups experienced improvements (p < 0.0001). Younger age, better baseline BCVA, and a diagnosis of BRVO were independent predictors of better final visual acuity.

CONCLUSION: Over 7.5 years, treatment was discontinued for three-quarters of RVOs. Stable disease was the most common reason for discontinuation, with nearly half (45%) of all RVOs in the cohort stable off active therapy. Better visual outcomes were achieved in BRVO than in CRVO, although both groups benefited from treatment.

PMID:37669742 | DOI:10.1016/j.jcjo.2023.08.005

Int J Pharm. 2023 Sep 3:123368. doi: 10.1016/j.ijpharm.2023.123368. Online ahead of print.

ABSTRACT

The drying capacity of a continuous vibrated fluid bed dryer was studied using a DoE by varying microcrystalline cellulose content in the formulation, water amount in the twin-screw granulation, inlet air temperature, air flow rate and the acceleration of the horizontal fluid-bed. Temperature and humidity profiles were measured along the dryer using wireless sensors. For the parameter space explored in this study, acceleration was the most influential process parameter of the dryer regarding the resulting granule moisture content. An empirical model was developed that allowed for fast and accurate moisture content prediction that could be incorporated into an enhanced control strategy. In addition, a mechanistic model was formulated that allow for prediction of temperature and moisture profiles, and most importantly the moisture content of the granules inside the dryer. The mechanistic model can be integrated to other unit operation models to provide overall understanding of an integrated continuous process line. The mechanistic model also makes it possible to define the equipment design requirements (e.g., length of the dryer) to meet the specific needs in terms of drying capacity, temperature and moisture profile.

PMID:37669728 | DOI:10.1016/j.ijpharm.2023.123368

Photodiagnosis Photodyn Ther. 2023 Sep 3:103777. doi: 10.1016/j.pdpdt.2023.103777. Online ahead of print.

ABSTRACT

AIM: The objective of this study is to investigate and compare the superficial and deep vascular structures of the retina, as well as the changes in the choriocapillaris (CC) and optic disc microvasculature, using optical coherence tomography angiography (OCTA) in patients diagnosed with diabetes mellitus (DM) without diabetic retinopathy (DR), patients with non-proliferative and proliferative DR, and healthy individuals.

MATERIALS AND METHODS: This prospective study conducted between July 2020 and July 2021 included patients diagnosed with type 2 DM without DR, as well as patients with mild nonproliferative, moderate nonproliferative, and proliferative DR without macular edema. A control group of 25 age- and gender-matched healthy individuals was also included. OCTA parameters of the patients were examined.

RESULTS: In the DR groups, compared to the control group, there was a significant decrease in macular superficial, deep, and CC perfusion areas as the severity of DR increased (p<0.001). The vascular density (VD) of the superficial capillary plexus (SCP) and deep capillary plexus (DCP) exhibited a statistically significant decrease in all quadrants of the DR group compared to the control group (p=0.033 for SCP in the fovea, p<0.001 for all other quadrants). The superficial and deep FAZs showed a significant expansion in the DR group compared to the control group (p=0.003 for superficial FAZ, p<0.001 for deep FAZ). As the severity of DR increased, there was a statistically significant decrease in the perfusion areas of the optic nerve head (ONH), radial peripapillary capillary (RPC), and vitreous segments (p<0.001 for ONH, p=0.031 for RPC, p<0.001 for vitreous). There was a statistically significant decrease in RPC VD in all quadrants as the severity of DR increased. Moreover, as the severity of DR increased, a statistically significant decrease in the VD of the ONH was observed in all quadrants except for the inferior nasal (p=0.094), inferior temporal (p=0.111), superior temporal (p=0.18), and temporal (p=0.284) quadrants.

CONCLUSION: Our study demonstrated the involvement of macular and optic nerve perfusion areas (PA) and VD in diabetic patients. OCTA proved to be a valuable and noninvasive imaging modality, providing an easy and repeatable assessment of posterior segment vascular changes in patients with DR.

PMID:37669724 | DOI:10.1016/j.pdpdt.2023.103777

Arch Cardiol Mex. 2023 Sep 5. doi: 10.24875/ACM.22000118. Online ahead of print.

ABSTRACT

INTRODUCTION AND OBJECTIVES: The objective of this study is to compare the clinical characteristics and outcomes of contemporary cohorts of patients undergoing catheter ablation for atrial fibrillation (AF), stratified by age (< 70 years and ≥ 70 years).

METHODS: This retrospective cohort study included patients who underwent catheter ablation for refractory AF. The minimum follow-up duration per patient was 12 months.

RESULTS: A total of 239 patients were included in the study, with 171 (71.5%) in the < 70 years group and 68 (28.5%) in the ≥ 70 years group. The mean age of the study population was 62.4 years (SD 10.87). The < 70 years group had a mean age of 58.03 years (SD 9.71), while the ≥ 70 years group had a mean age of 73.4 years (SD 3.05). Furthermore, a higher proportion of paroxysmal AF was observed in patients < 70 years, whereas a higher proportion of persistent AF was found in patients ≥ 70 years. These differences were statistically significant. The recurrence rates after the initial ablation procedure were similar between the two groups (21.43% in the < 7 0 years group vs. 23.53% in the ≥ 70 years group, p = 0.79). Additionally, there were no significant differences in terms of complications. The < 70 years group experienced 18 complications, while the ≥ 70 years group had 5 complications (p = 0.472).

CONCLUSION: The findings of this study suggest that patients aged 70 years and older who undergo their first catheter ablation procedure for AF demonstrate similar clinical outcomes compared to patients younger than 70 years.

PMID:37669664 | DOI:10.24875/ACM.22000118

Acta Ortop Mex. 2022 Nov-Dec;36(6):373-378.

ABSTRACT

INTRODUCTION: the orthopedic shoe is usually prescribed during postoperative care after hallux valgus surgery to protect the osteotomy and provide functional comfort to the patient. In this regard, the superiority of rigid sole shoe (RSS) compared to the reverse camber shoe (RCS) remains controversial. The aim of this study is to compare the clinical, functional and radiological outcomes from using the rigid sole shoe (RSS) vs. the reverse camber shoe (RCS) after hallux valgus surgery.

MATERIAL AND METHODS: fifty-seven hallux valgus surgery patients were included and analyzed retrospectively. The 1st group included 28 patients using the RSS and the 2nd group included 29 patients using the RCS. The orthopedic shoe was used for six weeks postoperatively. Clinical data (lumbar and lower limb pain, need of crutches and problems with going up and down stairs), radiological data (IMA, HVA) and postoperative complications (displacement of osteotomy, metatarsal fracture or non-union) were collected.

RESULTS: the RSS showed less difficulty going up and down stairs (OR 3.8 (CI 95% 1.2-12.8), p 0.02), only going upstairs (OR 3.2 (CI 95% 1.1-10), p 0.03), as well as a decreased need for crutches (OR 1.7 (CI 95% 1.04-2.6), p < 0.03). Lumbar spine or lower limb pain did not show any statistical differences. No statistical differences in the epidemiological and radiological data were found between the groups.

CONCLUSIONS: the RSS seems to provide more comfort to the patients without worsening the radiological results.

PMID:37669657

Ann Clin Biochem. 2023 Sep 5:45632231202330. doi: 10.1177/00045632231202330. Online ahead of print.

ABSTRACT

BACKGROUND: The CELTIC Ranges project aims to deliver a comprehensive range of reference intervals for commonly ordered laboratory investigations suitable for use in an Irish population as well as enabling comparison with relevant international studies. In this paper, we describe our methodology used throughout the entire project and present paediatric reference intervals for renal profile tests in plasma (sodium, potassium, urea, and creatinine).

METHODS: 1023 children aged up to 17 years were recruited from our hospital’s general practitioner paediatric phlebotomy clinic. Clinical chemistry analyses were performed on the Roche Modular system and statistical analysis was completed in line with CLSI guideline EP28-A3c.

RESULTS: The plasma reference interval for sodium for ages 0.45-16.99 years was 137-143 mmol/L in 1000 subjects (combined genders). For plasma potassium, the corresponding ranges between 1-16.99 years (combined genders) were 3.6-4.8 mmol/L. Apart from neonates and in keeping with other studies, age-partitioning for electrolytes was not required. Data for plasma creatinine (enzymatic methodology) and urea is also presented and, as anticipated, required partitioning for both age and gender.

CONCLUSIONS: Our renal profile findings are broadly consistent with those of international studies e.g. CALIPER, HAPPI, NORDIC, Prince and KiGGs. Moreover, the CELTIC Ranges study is also based on over 1000 subjects whose samples were analysed on the widely used Roche Modular analytics system. We also expect the findings will improve knowledge of children’s metabolic health in Ireland.

PMID:37669625 | DOI:10.1177/00045632231202330

Int Arch Allergy Immunol. 2023 Sep 5:1-8. doi: 10.1159/000533331. Online ahead of print.

ABSTRACT

INTRODUCTION: Many parents of children with allergies are worried whether their subsequent children will have allergic reactions to the same allergens. Much of the current research on sibling allergens has been focused on twins; however, in real life, very few children are twins. Our study provides an opportunity to initially explore the sensitivity to allergens in siblings diagnosed with respiratory allergic diseases.

METHODS: Siblings diagnosed with bronchial asthma and/or allergic rhinitis in the Outpatient Department of Allergy Department of Yantai Yuhuangding Hospital from January 2018 to December 2021 were selected. The siblings were divided into elder group and younger group. Data of gender, age, feeding history, serum total IgE (TIgE), absolute eosinophil counts, and allergen-specific IgE (sIgE) were collected and analyzed. The sIgEs of allergens were divided into six categories and analyzed.

RESULTS: A total of 98 sibling pairs of patients were included in this study. There were no differences in the positive rates of the different types of allergens, TIgE values, and the absolute eosinophil values between the elder and younger groups and between different genders. Logistic regression analysis indicated that the elder siblings allergic to dust mites, fungi, weed pollens, or food had a statistically significant increased risk of having their younger sibling sensitive to these types of allergens (all p &lt;0.05), and the risk of allergy to dust mites, weed pollens, and tree pollens of younger group increased with age (all p &lt;0.05). Except for the sIgE values of dust mites, the sIgE values of the other allergens were significantly correlated between the two groups (all p &lt;0.05).

CONCLUSION: The positive rates of different allergens were similar between siblings. Elder siblings with dust mites, fungi, weed pollen, or food allergen positivity will have younger siblings sensitive to the same types of allergens.

PMID:37669624 | DOI:10.1159/000533331

J Chromatogr A. 2023 Aug 21;1708:464320. doi: 10.1016/j.chroma.2023.464320. Online ahead of print.

ABSTRACT

As production processes have evolved, airborne concentrations of benzene, toluene and xylene in many workplaces are already well below the occupational exposure limits. However, studies have shown that low levels of exposure to benzene, toluene and xylene can still cause health effects in people exposed occupationally. However, there is no literature on health risk assessment of internal exposure. In view of this, an analytical method based on quaternary amine-functionalized core-shell-shell magnetic polymers (QA-CSS-MPs) was developed for the determination of seven metabolites in urine by MSPE-UPLC-DAD-HRMS. Furthermore, an improved QuEChERS method for the extraction of seven metabolites from human urine samples was introduced for the first time and satisfactory extraction rates were achieved. In addition, QA-CSS-MPs microspheres with core-shell-shell structure were designed and synthesized, and the morphology, composition and magnetic properties of the materials were fully characterized to verify the rationality of the synthetic route. Subsequently, QA-CSS-MPs microspheres were used as magnetic solid-phase extraction (MSPE) adsorbents for the purification of urine extracts, and UPLC-DAD-HRMS was used for the detection of seven metabolites. As a result, this method allows the accurate determination of seven metabolites in urine samples over an ultra-wide concentration range (0.001-100 mg/L). Under optimal experimental conditions, i.e., 2% hydrochloric acid in urine for the hydrolysis and 20 mg of QA-CSS-MPs for 5 min purification, the spiked recoveries of the seven target metabolites ranged from 81.5% to 117.7% with RSDs of 1.0%-9.4%. The limits of detection (LODs, S/N≥3) for the established method were in the range of 0.2-0.3 μg/L. The developed method was applied to 254 human urine samples for the determination of seven metabolites. The results showed that the concentration distributions of three xylene metabolites in urine, 2-MHA, 3-MHA, 4-MHA and total MHA, showed statistically significant differences for occupational exposure (p<0.001). In addition, the results of the internal exposure assessment showed that there is a high potential health risk associated with occupational exposure processes.

PMID:37669614 | DOI:10.1016/j.chroma.2023.464320

Prev Vet Med. 2023 Sep 1;219:106017. doi: 10.1016/j.prevetmed.2023.106017. Online ahead of print.

ABSTRACT

Stray animals are unowned free roaming, homeless, abandoned, street or sheltered animals, particularly dogs, cats and cattle. They could act as carrier of several zoonotic pathogens such as rabies virus, Mycobacterium and Brucella species. However, comprehensive information on the prevalence of zoonotic pathogens in stray animals is very limited. We conducted a systematic review as per Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) 2020 guidelines to estimate the prevalence of brucellosis in stray dogs, cats and cattle. Eligibility criteria for the study were determined using the PECOS classification (population, exposure, comparison, outcome, study design) as a tool to guide the research and adjust the search strategy. Major bibliographic databases [Web of Science, Medline, Scopus, ScienceDirect, Google Scholar and PubMed] were searched using predefined keywords for published epidemiological studies on brucellosis in stray animals (dogs, cats and cattle). Systematic assessments of all the studies since 1990-2022 were conducted and those reporting the prevalence of brucellosis in stray dogs, cats and cattle using appropriate diagnostic tests (culture, molecular, serological) were included. Studies reporting prevalence of brucellosis (Brucella infection or exposure) in kennel dogs, dairy herds, livestock farms, humans or marine species were excluded. The apparent individual test- wise prevalence along with 95% confidence intervals (CI) was estimated using Epitools. Out of 2689 studies, 37 met the inclusion criteria and were included in the systematic review. Of 37 studies, 28 (75.7%) were conducted in stray dogs, 7 (18.9%) in cattle and 2 (5.4%) in cats. Furthermore, only 21.62% studies (8/37) used probabilistic random sampling approaches and 13.51% studies (5/37) explained and justified the study sample size using appropriate methods for estimation of disease prevalence in the study populations. Higher sero-prevalence in stray dogs has been reported in studies conducted in Jordan (38.0% (95% CI: 24.0-54.0) and Pakistan (38.0% (95% CI: 31.0-45.0) whereas no sero-positivity was recorded in the studies conducted in Brazil, North Colombia, Cyprus, South Korea and USA. All studies on brucellosis (n = 7) in stray cattle were from India; conducted in stray cattle reared in cow-shelters. Sero-prevalence in the range of 4.3%- 64.3% was reported in stray cattle. Differences in diagnostic tests and host species, as well as limited number and non-randomized studies and high statistical heterogeneity did not allow us to determine combined meta-analysed prevalence estimates. Stray animals are likely to pose a zoonotic and disease spillover risk to human and livestock populations.

PMID:37669604 | DOI:10.1016/j.prevetmed.2023.106017

J Foot Ankle Res. 2023 Sep 5;16(1):54. doi: 10.1186/s13047-023-00654-8.

ABSTRACT

BACKGROUND: Footwear and orthotic research has traditionally been conducted within laboratories. With increasing prevalence of wearable sensors for foot and ankle biomechanics measurement, transitioning experiments into the real-world is realistic. However wearable systems must effectively detect the direction and magnitude of response to interventions to be considered for future usage.

METHODS: RunScribe IMU was used simultaneously with motion capture, accelerometers, and force plates during straight-line walking. Three orthotics (A, B, C) were used to change lower limb biomechanics from a control (SHOE) including: Ground reaction force (GRF) loading rate (A), pronation excursion (A and B), maximum pronation velocity (A and B), and impact shock (C) to test whether RunScribe detected effects consistent with laboratory measurements. Sensitivity was evaluated by assessing: 1. Significant differences (t-test) and effect sizes (Cohen’s d) between measurement systems for the same orthotic, 2. Statistical significance (t-test and ANOVA) and effect size (Cohen’s d & f) for orthotic effect across measurement systems 3. Direction of orthotic effect across measurement systems.

RESULTS: GRF loading rate (SHOE: p = 0.138 d = 0.403, A: p = 0.541 d = 0.165), impact shock (SHOE: p = 0.177 d = 0.405, C: p = 0.668 d = 0.132), pronation excursion (A: p = 0.623 d = 0.10, B: p = 0.986 d = 0.00) did not significantly differ between measurement systems with low effect size. Significant differences and high effect sizes existed between systems in the control condition for pronation excursion (p = 0.005 d = 0.68), and all conditions for pronation velocity (SHOE: p < 0.001 d = 1.24, A: p = 0.001 p = 1.21, B: p = 0.050 d = 0.64). RunScribe (RS) and Laboratory (LM) recorded the same significant effect of orthotic but inconsistent effect sizes for GRF loading rate (LM: p = 0.020 d = 0.54, RS: p = 0.042 d = 0.27), pronation excursion (LM: p < 0.001 f = 0.31, RS: p = 0.042 f = 0.15), and non-significant effect of orthotic for impact shock (LM: p = 0.182 d = 0.08, RS: p = 0.457 d = 0.24). Statistical significance was different between systems for effect of orthotic on pronation velocity (LM: p = 0.010 f = 0.18, RS: p = 0.093 f = 0.25). RunScribe and Laboratory agreed on the direction of change of the biomechanics variables for 69% (GRF loading rate), 40%-70% (pronation excursion), 47%-65% (pronation velocity), and 58% (impact shock) of participants.

CONCLUSION: The RunScribe shows sensitivity to orthotic effect consistent with the laboratory at the group level for GRF loading rate, pronation excursion, and impact shock during walking. There were however large discrepancies between measurements in individuals. Application of the RunScribe for group analysis may be appropriate, however implementation of RunScribe for individual assessment and those including pronation may lead to erroneous interpretation.

PMID:37670403 | DOI:10.1186/s13047-023-00654-8