Tag: statistics

J Dent. 2024 Jul 16:105246. doi: 10.1016/j.jdent.2024.105246. Online ahead of print.

ABSTRACT

OBJECTIVE: To evaluate the postoperative sensitivity (POS), as well as the clinical performance of posterior restorations using a new chemically-cured bulk-fill composite (Stela Automix and Stela Capsule, SDI) comparing with a light-cured bulk-fill composite after 6 months.

METHODS: Fifty-five participants with at least three posterior teeth needing restoration were recruited. A total of 165 restorations were performed on Class I or Class II cavities. After the application of Stela primer, the chemically-cured composite (Stela Automix or Stela Capsule) was inserted. For the light-cured composite group, a universal adhesive (Scotchbond Universal) was applied with a bulk-fill composite (Filtek One). Participants were evaluated for spontaneous and stimulated POS in the baseline, after 48 hours, 7 days, and 6 months. Additionally, each restoration was assessed using the updated version of FDI criteria after 6 months. The differences in the proportions of the groups were compared by Cochran test statistics (α=0.05).

RESULTS: Both chemically-cured composites showed a lower risk of POS compared to the light-cured composite at baseline and up to 48 hours (p<0.04). A significantly lower surface luster and texture was observed for the Stela Capsule composite compared to the light-cured bulk-fill composite (baseline and 6 months; p=0.03). A significant color mismatch was observed for the light-cured bulk-fill composite compared to the chemically-cured composites (baseline and 6 months; p=0.03). No significant differences were observed in any other item evaluations (p>0.05).

CONCLUSION: Chemically-cured composites exhibit lower postoperative sensitivity and less color mismatch compared to a light-cured bulk-fill composite after 6 months of clinical service.

CLINICAL SIGNIFICANCE: The chemically-cured composites appear to be an appealing option for restoring posterior teeth, as they exhibit lower postoperative sensitivity compared to a light-cured bulk-fill composite, both at baseline and up to 48 hours, and less color mismatch.

PMID:39025426 | DOI:10.1016/j.jdent.2024.105246

Environ Toxicol Pharmacol. 2024 Jul 16:104511. doi: 10.1016/j.etap.2024.104511. Online ahead of print.

ABSTRACT

The issue of toxic metal pollution is a considerable environmental concern owing to its complex nature, spatial and temporal variability, and susceptibility to environmental factors. Current water quality criteria and ecological risk assessments of metals are based on single-metal toxicity data from short-term, simplified indoor exposure conditions, ignoring the complexity of actual environmental conditions. This results in increased uncertainty in predicting toxic metal toxicity and risk assessment. Using appropriate bioavailability and effect modeling of metals is critical for establishing environmental quality standards and performing risk assessments for metals. Traditional dose-effect models are based on a static statistical relationship and fall short of revealing the bioavailability and effect processes of metals and do not effectively assess ecological impacts under complex exposure conditions. This paper summarizes the toxicokinetic-toxicodynamic (TK-TD) model, which is gaining interest in environmental and ecotoxicological research. The key concepts, and theories of its construction theories, are discussed and the application of the TK-TD model in toxicity prediction and risk assessment of different metals in the aquatic environment, and trends in the development of the TK-TD model are highlighted. The findings of our review prove that the TK-TD model can effectively predict toxic metal toxicity in real time and under complex exposure conditions in the future.

PMID:39025423 | DOI:10.1016/j.etap.2024.104511

Obstet Gynecol. 2024 Aug 1;144(2):241-251. doi: 10.1097/AOG.0000000000005634. Epub 2024 Jun 6.

ABSTRACT

OBJECTIVE: To identify individual- and community-level factors that predict the odds of multigravid Black women having consecutive pregnancies without adverse pregnancy outcomes.

METHODS: We conducted a secondary analysis of 515 multigravid Black women from a longitudinal observational study (2017-2019). We assessed the presence of adverse pregnancy outcomes (hypertensive disorders, gestational diabetes, preterm birth, fetal growth restriction, placental abruption, and pregnancy loss) for the index and prior pregnancies. We examined U.S. Census data, medical records, and surveys across multiple socioecologic domains: personal, behavioral, socioeconomic, and policy. We estimated adjusted odds ratios (aORs) and 95% CIs for the association between individual- and community-level factors and consecutive healthy pregnancies using hierarchical logistic regression models adjusted for maternal age, body mass index (BMI), gravidity, interpregnancy interval, and median household income.

RESULTS: Among 515 multigravid Black women (age 27±5 years, BMI 31.4±8.9, gravidity 4±2), 38.4% had consecutive healthy pregnancies without adverse pregnancy outcomes. Individual-level factors associated with consecutive healthy pregnancies included normal glucose tolerance (aOR 3.9, 95% CI, 1.2-12.1); employment (aOR 1.9, 95% CI, 1.2-2.9); living in communities with favorable health indicators for diabetes, hypertension, and physical activity; and household income of $50,000 per year or more (aOR 3.5, 95% CI, 1.4-8.7). When individual and community factors were modeled together, only income and employment at the individual and community levels remained significant.

CONCLUSION: Individual and community income and employment are associated with consecutive healthy pregnancies in a cohort of Black patients, emphasizing the need for comprehensive, multilevel systems interventions to reduce adverse pregnancy outcomes for Black women.

PMID:39024647 | DOI:10.1097/AOG.0000000000005634

J Glob Health. 2024 Jul 19;14:04126. doi: 10.7189/jogh.14.04126.

ABSTRACT

BACKGROUND: Bangladesh carries a substantial health and economic burden of seasonal influenza, particularly among the World Health Organization (WHO)-defined high-risk populations. We implemented a modelling study to determine the cost-effectiveness of influenza vaccination in each of five high-risk groups (pregnant women, children under five years of age, adults with underlying health conditions, older adults (≥60 years), and healthcare personnel) to inform policy decisions on risk group prioritisation for influenza vaccination in Bangladesh.

METHODS: We implemented a Markov decision-analytic model to estimate the impact of influenza vaccination for each target risk group. We obtained model inputs from hospital-based influenza surveillance data, unpublished surveys, and published literature (preferentially from studies in Bangladesh, followed by regional and global ones). We used quality-adjusted life years (QALY) as the health outcome of interest. We also estimated incremental cost-effectiveness ratios (ICERs) for each risk group by comparing the costs and QALY of vaccinating compared to not vaccinating each group, where the ICER represents the additional cost needed to achieve one year of additional QALY from a given intervention. We considered a willingness-to-pay threshold (ICER) of less than one gross domestic product (GDP) per capita as highly cost-effective and of one to three times GDP per capita as cost-effective (per WHO standard). For Bangladesh, this threshold ranges between USD 2462 and USD 7386.

RESULTS: The estimated ICERs were USD -99, USD -87, USD -4, USD 792, and USD 229 per QALY gained for healthcare personnel, older adults (≥60), children aged less than five years, adults with comorbid conditions, and pregnant women, respectively. For all risk groups, ICERs were below the WHO willingness-to-pay threshold for Bangladesh. Vaccinating pregnant women and adults with comorbid conditions was highly cost-effective per additional life year gained, while vaccinating healthcare personnel, older adults (≥60), and children under five years were cost-saving per additional life year gained.

CONCLUSIONS: Influenza vaccination to all target risk groups in Bangladesh would be either cost-saving or cost-effective, per WHO guidelines of GDP-based thresholds.

PMID:39024624 | DOI:10.7189/jogh.14.04126

J Glob Health. 2024 Jul 19;14:04144. doi: 10.7189/jogh.14.04144.

ABSTRACT

BACKGROUND: As the global population ages, the burden of cancer is increasing. We aimed to assess the impact of population ageing on cancer-related disability-adjusted life years (DALYs).

METHODS: We used the decomposition method to estimate the impact of ageing, population growth, and epidemiological change on cancer-related DALYs from 1990 to 2019, stratified by 204 countries/territories and by their sociodemographic index (SDI). This approach separates the net effect of population ageing from population growth and change in age-specific DALY rates.

RESULTS: Cancer-related DALYs among individuals aged ≥65 years increased by 95.14% between 1990 (52.25 million) and 2019 (101.96 million). Population growth was the main contributor to cancer-related DALYs (92.38 million, attributed proportion: 60.91%), followed by population ageing (41.38 million, 27.28%). Cancer-related DALYs attributed to population ageing followed a bell-shaped pattern when stratified by SDI, meaning they peaked in middle-SDI countries. Cancer-related DALYs attributed to ageing increased in 171 and decreased in 33 countries/territories. The top three cancer types with the highest increase in the absolute number of cancer-related DALYs associated with ageing were tracheal, bronchus, and lung (8.72 million); stomach (5.06 million); and colorectal (4.28 million) cancers, while the attributed proportion of DALYs was the highest in prostate (44.75%), pancreatic (40.93%), and non-melanoma skin (38.03%) cancers.

CONCLUSIONS: Population ageing contributed to global cancer-related DALYs, revealing a bell-shaped pattern when stratified by socioeconomic development, affecting middle-SDI countries the most. To respond to the growing ageing population and reduce cancer-related DALYs, it is necessary to allocate health care resources and prioritize interventions for older adults.

PMID:39024622 | DOI:10.7189/jogh.14.04144

Obstet Gynecol. 2024 Aug 1;144(2):e46. doi: 10.1097/AOG.0000000000005653.

NO ABSTRACT

PMID:39024617 | DOI:10.1097/AOG.0000000000005653

Turk J Pediatr. 2024 Jul 11;66(3):346-353. doi: 10.24953/turkjpediatr.2024.4566.

ABSTRACT

OBJECTIVE: Rheumatic heart disease (RHD) is the most common cause of acquired heart disease in developing countries and remains a serious public health problem. In the subclinical course of carditis, the absence of typical symptoms and the normal range of classical echocardiographic measurements used to evaluate cardiac functions have required new echocardiographic methods and parameters. Previous studies regarding rheumatic heart disease in children and adults have shown that strain patterns obtained by speckle tracking echocardiography, are in fact affected although left ventricular systolic functions are preserved, yet some studies have suggested otherwise. The aim of our study is to compare the use of speckle tracking echocardiography with conventional methods in the evaluation of cardiac functions and myocardial involvement in children with subclinical RHD.

MATERIALS AND METHODS: The study group consisted of 24 patients with asymptomatic cardiovascular who had no history of acute rheumatic fever, but had definite or probable rheumatic valve disease. This study group was determined according to the World Heart Federation guidelines by an echocardiographic examination performed for different reasons, as well as the control group of 22 healthy children. In order to evaluate the left ventricular regional myocardial functions of the patients, tissue Doppler echocardiography (TDE) and speckle tracking echocardiographic parameters were compared with the control group.

RESULTS: The mean ages of the patient and control groups were 14.1±2.7 years and 13.9±2.3 years, respectively. There was no statistically significant difference between the two groups in terms of conventional methods (p>0.05) but global longitudinal strain and strain rate values were found to be significantly lower in the patient group (p<0.01). These changes appeared to be relevant throughout the duration of the illness.

CONCLUSION: In patients with subclinical rheumatic heart disease, conventional echocardiographic evaluations are likely negative, whereas two-dimensional speckle tracking echocardiography reveal systolic and diastolic dysfunctions of the disease.

PMID:39024598 | DOI:10.24953/turkjpediatr.2024.4566

N Z Med J. 2024 Jul 19;137(1599):49-54. doi: 10.26635/6965.6477.

ABSTRACT

AIMS: To describe the clinical features and outcomes of patients with myelopathy and neuropathy due to recreationally inhaled nitrous oxide.

METHODS: We identified patients presenting with nitrous oxide-associated myelopathy from an electronic database of all discharges in a large tertiary hospital between 2016 and 2023. Demographics, clinical features and the results of investigations were recorded. The primary outcome was modified Rankin Scale score (mRS) at least 3 months after hospital discharge where available.

RESULTS: There were 12 patients identified, six women, mean (SD) age 27.5 (5.1) years, range 19-47 years. The most common symptoms were numbness, weakness and mental state changes. Four patients used large amounts of inhaled nitrous oxide and also took over-the-counter vitamin B12 supplements. The median (range) hospital length of stay was 8.5 (2-56) days. Functional independence at last assessment (median [range] of 3 [1-34] months after discharge) was achieved in nine of the patients, with three requiring ongoing support for activities of daily living (mRS ≥3).

CONCLUSION: Nitrous oxide abuse and its neurological complications are an important public health issue. Clinicians should be aware that some patients who use large amounts of nitrous oxide may self-supplement vitamin B12.

PMID:39024584 | DOI:10.26635/6965.6477

N Z Med J. 2024 Jul 19;137(1599):37-48. doi: 10.26635/6965.6428.

ABSTRACT

AIM: To describe the incidence, characteristics, outcomes and hospital costs of patients admitted to hospital following trauma in a health region in Aotearoa New Zealand over a 10-year period.

METHODS: A retrospective, observational study used data from the Te Manawa Taki (TMT) regional trauma registry to identify patients of all ages and injury severities that were admitted to hospital following injuries from 2013 to 2022, inclusive. This study reports on incidence of injuries with regard to age, gender, ethnicity, injury severity score (ISS), injury characteristics and direct cost to TMT facilities.

RESULTS: Searches identified 60,753 trauma events leading to patient admission to hospitals in the TMT region. Of these, 81.9% were low-severity trauma, 10.2% were moderate-severity trauma and 7.9% were high-severity trauma. There were statistically significant relationships between gender, ethnicity and ISS category. Males were more likely to be hospitalised for any traumatic injuries. High-severity trauma is dominated by road traffic injuries and low-severity trauma is dominated by falls. Advanced age was associated with higher injury severity. The direct cost of trauma care to TMT hospitals increased by 122% during the 10-year period.

CONCLUSIONS: The study has identified the incidence, demographic features, severity, costs and outcomes for trauma patients admitted to hospitals in the TMT region of Aotearoa New Zealand over a continuous 10-year period. The volumes and costs of injury represent a significant burden on the health system, individuals and communities. Detailed understanding of the causes and costs of injuries of all severities will inform prevention activities, clinical quality improvement and health service planning.

PMID:39024583 | DOI:10.26635/6965.6428

N Z Med J. 2024 Jul 19;137(1599):27-36. doi: 10.26635/6965.6361.

ABSTRACT

AIM: The aim of this study was to update and project the growth of ophthalmologists in New Zealand. This will help decision makers better understand the current ophthalmologist workforce and make appropriate resource allocations.

METHOD: Supply and demographics of ophthalmologists in New Zealand were obtained from the Medical Council of New Zealand, Health Workforce New Zealand and Health New Zealand – Te Whatu Ora. Ophthalmology trainee numbers were extracted from the annual reports of the Royal Australian and New Zealand College of Ophthalmologists (RANZCO). New Zealand population statistics were extracted from the Stats NZ database. A simulation model was developed to project the growth of ophthalmologists from 2024 to 2050.

RESULTS: In March 2023, there were 175 practising ophthalmologists in New Zealand. Overall, there were 34.0 ophthalmologists per million population, with 201.4 ophthalmologists per million for those aged ≥65 years. To maintain the current ratio, an additional 20 practising ophthalmologists are needed by 2050.

CONCLUSION: The ratio of ophthalmologists per million population aged ≥65 years is projected to drop by 1.5% annually. To meet the demand of an increasing and ageing population, and RANZCO’s goal of 40 ophthalmologists per million population, there needs to be an increase in ophthalmologist training positions from the current 5-year average of 6.6 to 11 new trainees annually, and a more effective distribution of the ophthalmologist workforce.

PMID:39024582 | DOI:10.26635/6965.6361