Category: Statistics

Eur J Pain. 2022 Mar 9. doi: 10.1002/ejp.1932. Online ahead of print.

ABSTRACT

BACKGROUND: With regard to attitudes towards pain, many questionnaires have been developed. Although undoubtedly useful, they were specifically designed for the use in chronic pain and are less suitable for the assessment in the general population. The purpose of the present paper was to develop a measure for the assessment of general attitudes towards pain applicable in the general population, regardless of clinical condition, and to test its psychometric properties.

METHODS: We developed the General Attitudes Towards Pain Inventory and conducted two studies in order to provide psychometric data: In a general population sample (N = 362, study one), participants were asked to complete a questionnaire battery. To assess test-retest reliability, participants were contacted again after four weeks (retest sample: N = 101). For the evaluation of criterion validity (study two), a sample with sadomasochistic sexual preference (N = 68) was additionally recruited.

RESULTS: Statistical analyses revealed, overall, acceptable internal consistencies and test-retest reliabilities. A ten-factor model showed acceptable fit and was superior to alternative models. The inventory demonstrated convergent and divergent validity. In this context, we found pain sensitivity to be associated with pain attitudes. Finally, compared to the general population sample, individuals with sadomasochistic sexual preference showed significantly higher scores on fascination-pleasure and challenge subscales.

CONCLUSIONS: In the present paper, we introduce a new and comprehensive instrument for pain research and provide evidence for its reliability and validity. In addition, we present new insights into how interindividual differences in pain sensitivity relate to pain attitudes.

PMID:35263817 | DOI:10.1002/ejp.1932

J Knee Surg. 2022 Mar 9. doi: 10.1055/s-0042-1743497. Online ahead of print.

ABSTRACT

Isolated lateral compartment knee osteoarthritis (OA) affects between 7 and 10% of patients with knee OA. Although lateral unicompartmental knee arthroplasty (UKA) is an accepted treatment to manage this condition, it is performed relatively infrequently. The aim of this study was to evaluate the mid-term survivorship, radiographic outcomes, and patient-reported outcome measures (PROMs). We performed a retrospective review of a prospectively maintained database of consecutive isolated lateral UKAs performed by a single surgeon at an academic institution between September 2007 and December 2015. Our primary outcome was failure defined as revision surgery to total knee arthroplasty (TKA). Secondary outcomes included any additional surgery for any other reason. Forty-nine consecutive patients (27 females) with median age of 54.7 years (45.2-82.2) met the inclusion criteria. The survival rate for the whole cohort was 86.1% (95% confidence interval [CI]: 73.2-99.0) at 10 years as defined by conversion to TKA. There were a total of four lateral UKAs (all mobile bearings) revised to TKAs. The entire cohort demonstrated statistically significant improvements from preoperative PROMs compared with the most recent postoperative PROMs including the Western Ontario and McMaster Universities Osteoarthritis Index, Knee injury and Osteoarthritis Outcome Score, and Tegner activity scale at a median 8.8 (1.7-12.2) years follow-up. Patients with mobile bearing underwent higher revision to TKA and reoperation for all indications compared with fixed-bearing lateral UKA. In this relatively young cohort, lateral UKA yielded acceptable long-term survival and satisfactory improvement in functional outcomes. Patients who had fixed-bearing implants had similar improvement and trended toward lower revision rates than those with mobile-bearing implants. Level III therapeutic: retrospective Study was performed.

PMID:35263794 | DOI:10.1055/s-0042-1743497

Am J Trop Med Hyg. 2022 Mar 9:tpmd211310. doi: 10.4269/ajtmh.21-1310. Online ahead of print.

ABSTRACT

Fluvoxamine is widely prescribed as an antidepressant. Recent studies show the drug may have a clinical benefit in treating COVID-19. We aimed to perform a meta-analysis of the existing randomized trials of fluvoxamine compared with placebo on the early treatment of COVID-19 patients. We included only randomized clinical trials enrolling ambulatory patients with early-stage disease (symptoms > 7 days) for the prevention of hospitalization. We searched MEDLINE, and clinicaltrials.gov databases to identify trials and extract data with clarifications from the study investigators. We performed a fixed-effects meta-analysis and sensitivity analyses via R to evaluate the pooled estimate of hospitalization. We included three randomized trials: STOP COVID 1 and 2, and the TOGETHER Trial. The studies included a total of 2,196 patients. The STOP COVID trials measured clinical deterioration whereas the TOGETHER Trial measured hospitalization as the primary outcome. All trials reported on hospitalization up to day 28. The meta-analysis results show that patients receiving fluvoxamine were 31% less likely to experience clinical deterioration or hospitalization compared with placebo (risk ratio, 0.69; 95% CI, 0.54-0.88). A sensitivity analysis using the definition of hospitalization resulted in a risk reduction of 21% (95% CI, 0.60-1.03). Data from three randomized controlled trials show that fluvoxamine was associated with a reduction in the primary outcome measure (either clinical deterioration or composite outcome of hospitalization or extended emergency setting observation), although analysis of hospitalization-only was not statistically significant. More evidence from future trials is still needed to support the findings of this meta-analysis.

PMID:35263710 | DOI:10.4269/ajtmh.21-1310

Rehabilitation (Stuttg). 2022 Mar 9. doi: 10.1055/a-1726-6845. Online ahead of print.

ABSTRACT

PURPOSE: There is little representative evidence for the German rehabilitation system on occupational reintegration after medical rehabilitation. For persons who have undergone rehabilitation on behalf of the German Pension Insurance (GPI) due to a neurological disease, it is therefore important to determine (a) what socio-medical risks exist prior to rehabilitation, (b) how well persons were able to participate in working life after rehabilitation, and (c) what conditions determine the work participation.

METHODS: The study is conducted on the basis of the GPI’s database of rehabilitation statistics. Included were all persons, who completed medical rehabilitation in 2016 due to a neurological disease. The analyses were carried out for the entire group and also in a differentiated manner for the 2 main diseases, cerebrovascular diseases (CD) and multiple sclerosis (MS). Work participation was operationalized both via a monthly status variable until 24 months after rehabilitation and as a rate of all persons who were employed at the 12 and 24 months follow up and in the 3 months before, respectively. To analyse the factors influencing stable work participation, multiple logistic regression models with stepwise inclusion were calculated separately for the rates after 12 and 24 months.

RESULTS: A total of 42,230 data sets were included in the analysis (CD: n=18,368, 44%; MS: n=6,343, 15%). Patients with neurological diseases were 50 years old on average, 43% were female. We found that approximately15% of patients reported no absenteeism, whereas 17% stated an absence leave of six months or more in the year prior to rehabilitation. Mental and cardiovascular comorbidity was documented in 31 and 44% of the cases respectively. Nearly 48% of patients with CD returned to work two years after rehabilitation. For MS patients, the percentage was slightly higher at 54%. The amount of sick leave of the rehabilitated individual, their gross/net income prior to rehabilitation as well their work capacity prior to admission were the three strongest influencing factors on their return to the labour market.

CONCLUSION: About half of all persons with neurological diseases return to sustainable work after medical rehabilitation in Germany. The amount of sick leave and the income before rehabilitation are determining factors as to whether the person will return to work. The analysis provides representative data on occupational reintegration after medical rehabilitation due to a neurological disease for the first time.

PMID:35263791 | DOI:10.1055/a-1726-6845

Nurse Educ Today. 2022 Mar 3;111:105322. doi: 10.1016/j.nedt.2022.105322. Online ahead of print.

ABSTRACT

BACKGROUND: Social media are a suite of popular online technologies that enable people to share and co-create digital content. Evidence suggests some nursing students utilise social media inappropriately but there is limited literature on nursing students’ opinions of professionalism in online environments. This study aimed to examine the opinions of nursing students in relation to digital professionalism on social media.

METHOD: A descriptive, cross-sectional study was conducted with undergraduate nursing students in the United Kingdom (n = 112). An existing self-reported questionnaire was adapted for data collection. This was distributed to adult nursing students enrolled across all four years of a Bachelor of Nursing programme. Data were analysed using descriptive statistics.

FINDINGS: Many nursing students were heavy social media users (n = 49, 44%), with Facebook, Instagram, and Snapchat being the most popular applications. Nursing students were also aware of the professional nursing regulator, the Nursing and Midwifery Council, guidelines on responsible social media use (n = 48, 43%). Nursing students’ responses to various digitally professional scenarios revealed agreement that posts about alcohol or sexually explicit content, along with comments about colleagues or patients were inappropriate. However, there were mixed views around taking photographs at work, with some nursing students across all four years of the degree programme perceiving this to be satisfactory behaviour.

DISCUSSION: The opinions of nursing students towards digital professionalism on social media are somewhat aligned with professional standards, although students can hold varying views on the subject. More research on how nursing students employ social media is warranted to ensure their opinions match their actual practice in online environments. It is also recommended to educate nursing students about the professional values and behaviours required on social media and how best to communicate, interact, and share information on the various online platforms, to minimise personal and organisational risk.

PMID:35263709 | DOI:10.1016/j.nedt.2022.105322

Clin Nutr. 2022 Feb 11;41(4):829-837. doi: 10.1016/j.clnu.2022.01.034. Online ahead of print.

ABSTRACT

BACKGROUND & AIMS: Skeletal muscle area (SMA) in the computed tomography (CT) at the third lumbar vertebra (L3) level is a proxy for whole-body muscle mass but is only performed for clinical reasons. Ultrasound is a promising tool to determine muscle mass at the bedside. It is still unclear how well ultrasound and which ultrasound measuring points can predict CT L3 SMA.

METHODS: This prospective observational trial included 200 non-critically ill patients, who underwent an abdominal CT scan for any clinical reason within 48 h before the ultrasound examination. Ultrasound muscle thickness was evaluated at 3 measuring points on the thigh and 2 measuring points on the upper arm with minimal compression. On the CT scan, the entire L3 SMA was measured based on Hounsfield units. Using a model selection algorithm based on the Bayesian information criterion (BIC) and clinical considerations, a linear prediction model for CT L3 SMA based on the ultrasound muscle thickness and other independent variables was fitted and assessed with cross-validation.

RESULTS: 67,5% and 32,5% of the patients were from surgical and medical wards, respectively. Mean ultrasound muscle thickness values were between 2,2 and 3,6 cm on the thigh and between 1,4 and 2,8 cm on the upper arm. All ultrasound muscle thickness values were higher in men than in women (P < 0,05). CT L3 SMA was 40 cm² higher in men than in women (P < 0,001). The final prediction model for CT L3 SMA included the following 4 independent variables: ultrasound muscle thickness at the ventral measuring point of the thigh in the short-axis plane, sex, weight, and height. It had a similar BIC (BIC of 1515) compared to larger models with 6-8 independent variables including multiple ultrasound measuring points (BIC of 1506-1519). Additional clinical considerations to choose the final model were less time consumption when measuring a single ultrasound measuring point and better anatomical overview at the short-axis plane. The final model predicted CT L3 SMA with a R² of 0,74 (P < 0,001) and a cross-validated R² of 0,65.

CONCLUSIONS: One single ultrasound measuring point at the thigh together with sex, height and weight very well predicts CT L3 SMA across different clinical populations. Ultrasound is a safe and bedside method to measure muscle thickness longitudinally to monitor the effects of nutrition and physical therapy.

PMID:35263692 | DOI:10.1016/j.clnu.2022.01.034

J Stomatol Oral Maxillofac Surg. 2022 Mar 6:S2468-7855(22)00055-6. doi: 10.1016/j.jormas.2022.03.009. Online ahead of print.

ABSTRACT

INTRODUCTION: The aims of this study were to evaluate periodontal bone defects around the lower and upper incisors and to identify changes in the buccolingual inclination of the incisors during orthodontic decompensation in skeletal Class III orthognathic surgery patients.

MATERIALS AND METHODS: The sample consisted of 26 adults with skeletal Class III deformity who had undergone presurgical orthodontic treatment and orthognathic surgery. Lateral cephalograms obtained before orthodontic treatment and before surgery were used to determine the inclination and position changes of the incisors. Cephalometric measurements were taken using Dolphin Imaging 11.95. Three-dimensional images were generated from cone-beam computed tomography (CBCT) scans prior to surgery and used to detect periodontal bone defects, including fenestration (F) and dehiscence (D).

RESULTS: Intraclass correlation coefficients (ICC) were determined and the measurements showed high reproducibility. The cephalometric data showed normal distribution and there were no differences between genders in terms of cephalometric changes, dehiscence, fenestration, or coexistent (D-F/DF) formation. The patients presented maxillary incisor retroclination and mandibular incisor proclination, which was consistent with the tooth decompensation. CBCT assessment was performed for a total of 208 teeth; while 81 upper and 94 lower incisors had D-F/DF formation, 23 upper and 10 lower incisors were healthy. Statistically significant correlations were not found between the inclination degree of the incisors and D-F/DF formation.

CONCLUSIONS: Decompensation of incisors during presurgical orthodontic treatment increases the risk of periodontal defects. There is no linear relationship between the increase in the inclination degrees of incisors and D-F/DF formation.

PMID:35263684 | DOI:10.1016/j.jormas.2022.03.009

Accid Anal Prev. 2022 Mar 6;169:106610. doi: 10.1016/j.aap.2022.106610. Online ahead of print.

ABSTRACT

This paper investigates the determinants of injury severities in pedestrian-motor vehicle accidents at signalised and unsignalised junctions, and at physically-controlled and human-controlled crossings in Scotland. The accident data were drawn from the official police crash report database of the UK spanning a period between 2010 and 2018. Correlated random parameter ordered probit models with heterogeneity in the means were developed in order to account for the multi-layered impact of unobserved heterogeneity on statistical estimation. The model estimation results showed that the severities of accident injuries are affected by roadway, location, weather, vehicle, and driver characteristics as well as temporal attributes (including time and day of the accident). Factors such as the urban context, lighting and weather conditions and road surface conditions were found to result in correlated random parameters, thus capturing the intricate, yet interactive effects of unobserved heterogeneity, and particularly the unobserved behavioural response of road users to different traffic control types at junctions and crossings. Vehicle type, driver’s gender and day-of-the-week were observed to influence the random parameters’ distributions. Empirically, the results showcase variations in the determinants of injury severities at signalised and unsignalised junctions, and at physically-controlled and human-controlled crossings. Even though most of these variations were related to the magnitude of impact of the determinants, differences in the directional effects on injury severities were also identified, mainly for factors related to weather conditions, hazard presence on the road, and temporal characteristics of the accidents.

PMID:35263674 | DOI:10.1016/j.aap.2022.106610

Clin Immunol. 2022 Mar 6:108965. doi: 10.1016/j.clim.2022.108965. Online ahead of print.

ABSTRACT

Rheumatoid arthritis (RA) etiopathogenesis still remains complex, but involvement of several immune cells is evident. Present study focusses on evaluation of polymorphonuclear neutrophils (PMNs) in RA patients and healthy controls. From generation of oxidative species, release of inflammatory cytokines and matrix-degrading proteases, PMNs possess the ability to mediate immunological responses. Intracellular and mitochondrial ROS in PMNs and other oxidative parameters including catalase, superoxide dismutase, glutathione peroxidase, reduced glutathione and lipid peroxidation were measured in PMNs and serum samples. Gene regulation studies involved in oxidative (Keap1 and Nrf2) and degradative pathways (MMP2 and MMP9) were done using DNA methylation analysis. Intracellular expression levels of Keap1, Nrf2, Dnmt1, MMP2, and MMP9 were analyzed using flowcytometry in patients and controls. Moreover, serum levels of pro-inflammatory cytokines IL-1β, IL-6, and TNF-α were also measured. Comparative measurements amongst patients and controls were statistically analyzed, and correlations were made with disease severity scores (DAS28 ESR).

PMID:35263664 | DOI:10.1016/j.clim.2022.108965

Photodiagnosis Photodyn Ther. 2022 Mar 6:102795. doi: 10.1016/j.pdpdt.2022.102795. Online ahead of print.

ABSTRACT

BACKGROUND: Photodynamic therapy (PDT) has shown satisfactory antibacterial effects. However, few information regarding the cytotoxicity potential of PDT using curcumin as a photosensitizer (PS) on fibroblasts are found. The aim of this in vitro study was to evaluate the cytotoxicity of root canal irrigating solutions and photodynamic therapy with curcumin PS on the L-929 cell line.

METHODS: Healthy mouse skin fibroblast cells were distributed into the following 7 experimental groups: G1 – culture medium DMEM (control group); G2 – 0.9% sodium chloride; G3 – 2.5% sodium hypochlorite (NaOCl); G4 – 5% NaOCl; G5 – PDT with curcumin PS at 500 mg/L + blue LED; G6 – PDT with curcumin PS at 750 mg/L + blue LED; and G7 – PDT with curcumin PS at 1000 mg/L + blue LED. All experimental groups which underwent PDT action were submitted to blue LED for 4 minutes, with a wavelength of 480 nm and energy fluency of 75 J/cm². The cultures were maintained under standard cell culture conditions (37°C, 100% humidity, 5% CO₂). Cell viability analysis was performed using the colorimetric method to evaluate the periods of 6, 24, and 48 hours. Data were subjected to the Kruskal-Wallis test, followed by the Dunn test to compare groups and Friedman test to compare periods (α = 0.05).

RESULTS: When comparing the periods, no significant differences were observed for any of the experimental groups analyzed (p > 0.05), except for the NaOCl_2.5 group that exhibited higher cell viability at 6 hours compared to the period of 48 hours (p = 0.0489). In the comparisons of the experimental groups, there were no statistically significant differences between the control group compared to all disinfection protocols, regardless of the period evaluated (p > 0.05), except for the PDT + C₁₀₀₀ group that showed lower cell viability (p < 0.05).

CONCLUSIONS: PDT with curcumin at 1000 mg/L was cytotoxic on L-929 fibroblast cell culture. However, laser-activated curcumin at a concentration of 500 mg/L presented no influence on L-929 fibroblast cell viability in in vitro conditions.

PMID:35263668 | DOI:10.1016/j.pdpdt.2022.102795