A national perspective on cardiovascular diseases in Saudi Arabia.

BACKGROUND: Cardiovascular diseases (CVDs) are common chronic conditions that lead to morbidity and mortality worldwide. However, there are no recent national or regional reports about CVDs in Saudi Arabia. Therefore, this study aimed to estimate the national and regional prevalence rates of CVDs among the Saudi population. METHODS: This study used data from an ongoing household health survey conducted by the General Authority for Statistics in 2017. The survey sample comprised 24,012 homes that were determined to be a representative sample of the population and dispersed throughout the 13 administrative areas. A self-reported diagnosis of CVD was collected by asking subjects if they had been diagnosed by a physician. RESULTS: The prevalence of CVDs among the Saudi population aged 15 years and older was 1.6% (n = 236,815). The prevalence is higher in males at 1.9% compared to females at 1.4%. Age is a significant factor, with a gradual increase in CVD prevalence until the age of 50, followed by a sharp rise. The prevalence among the age group (≥ 65 years) was the highest, recording 11% (n = 93,971), followed by the age group (60-64 years) which reached 6.5% (n = 31156.71), and the lowest prevalence was found in the age group (< 40 years) as 1.2% (n = 108,226). When considering regional differences, Makkah has the highest prevalence at 1.9% (n = 85,814), followed by Riyadh at 1.7% (n = 79,191). Conversely, Najran has the lowest prevalence at 0.76% (n = 332), with the Northern Border Region having the second lowest rate at 1,46% ( n = 4218) These findings underscore the importance of considering both demographic and regional factors in addressing and managing cardiovascular health in Saudi Arabia. CONCLUSION: This study provides the most recent estimates of the national and regional prevalence rates of CVDs in Saudi Arabia. The findings suggest that CVDs are more common among older adults, males, and residents of the Makkah region. This information can be used to inform public health policies and interventions to reduce the burden of CVDs in Saudi Arabia.

Comparison of a two-wavelength pyrometer system and spectral pyrometry for high-temperature measurements.

A pyrometer system is an optically passive, non-intrusive method that uses thermal radiation law to determine temperature. It combines electronic and optical instruments to detect low-level signals of radiation measurements. Surface high-temperature measurements are successfully obtained using a two-wavelength pyrometer system. This study used a pyrometer system to achieve high stability, minimize errors due to changing emissivity, and remove background noise from the radiation measurement for surface high-temperature measurements. Temperature measurements were also obtained from Planck's model, and the results were compared with logarithmic assumption. The precision of these measurements is improved through variable optimization of the instruments, validation of the data, and calibration of the pyrometer system. The 16 temperature measurements were obtained (800-1600°C temperature measurement range) with a correlation coefficient above 97%. The response time between temperature readings is within 785 µs. Furthermore, the high-temperature measurements were obtained with higher stability (±2.99∘ C at 1600°C) and less error (less than 2.29% for Si sensor). In addition, the error of the temperature measurement was reduced from 5.33% to 0.86% at 850°C by using Planck's model compared with using logarithmic assumption. A cooling system temperature is also optimized to reduce the error temperature reading. It was found to be at 10°C that the uncertainty was reduced from 2.29% at ambient temperature to 1.53% at 1600°C. The spectral pyrometry system was also used in comparison with the two-wavelength pyrometer system to confirm that the calibration curves of the spectral pyrometry can be used to determine temperature measurements.

Long-term care facilities' response to the COVID-19 pandemic: An international, cross-sectional survey.

AIMS: To (i) assess the adherence of long-term care (LTC) facilities to the COVID-19 prevention and control recommendations, (ii) identify predictors of this adherence and (iii) examine the association between the adherence level and the impact of the pandemic on selected unfavourable conditions. DESIGN: Cross-sectional survey. METHODS: Managers (n = 212) and staff (n = 2143) of LTC facilities (n = 223) in 13 countries/regions (Brazil, Egypt, England, Hong Kong, Indonesia, Japan, Norway, Portugal, Saudi Arabia, South Korea, Spain, Thailand and Turkey) evaluated the adherence of LTC facilities to COVID-19 prevention and control recommendations and the impact of the pandemic on unfavourable conditions related to staff, residents and residents' families. The characteristics of participants and LTC facilities were also gathered. Data were collected from April to October 2021. The study was reported following the STROBE guidelines. RESULTS: The adherence was significantly higher among facilities with more pre-pandemic in-service education on infection control and easier access to information early in the pandemic. Residents' feelings of loneliness and feeling down were the most affected conditions by the pandemic. More psychological support to residents was associated with fewer residents' aggressive behaviours, and more psychological support to staff was associated with less work-life imbalance. CONCLUSIONS: Pre-pandemic preparedness significantly shaped LTC facilities' response to the pandemic. Adequate psychological support to residents and staff might help mitigate the negative impacts of infection outbreaks. IMPACT: This is the first study to comprehensively examine the adherence of LTC facilities to COVID-19 prevention and control recommendations. The results demonstrated that the adherence level was significantly related to pre-pandemic preparedness and that adequate psychological support to staff and residents was significantly associated with less negative impacts of the pandemic on LTC facilities' staff and residents. The results would help LTC facilities prepare for and respond to future infection outbreaks. PATIENT OR PUBLIC CONTRIBUTION: No Patient or Public Contribution.

Promoting workplace retention during global crises: An international survey of the preventive role of psychological support among victims of social discrimination in long-term care facilities.

This international cross-sectional survey examined the potential role of organizational psychological support in mitigating the association between experiencing social discrimination against long-term care (LTC) facilities' healthcare professionals (HCPs) and their intention to stay in the current workplace during the COVID-19 pandemic. Participants included a convenience sample of 2,143 HCPs (nurses [21.5 %], nurse aids or residential care workers [40.1 %], social workers [12.1 %], and others [26.4 %]) working at 223 LTC facilities in 13 countries/regions. About 37.5 % of the participants reported experiencing social discrimination, and the percentage ranged from 15.3 % to 77.9 % across countries/regions. Controlling for socio-demographic and work-related variables, experiencing social discrimination was significantly associated with a lower intention to stay, whereas receiving psychological support showed a statistically significant positive association (p-value=0.015 and <0.001, respectively). The interaction term between social discrimination and psychological support showed a statistically significant positive association with the intention to stay, indicating a moderating role of the psychological support.

Traumatic vertebral artery dissection associated with cervical neck traction devices.

Cervical arterial dissection (CAD) is a common cause of stroke in young people which can be classified as either spontaneous or traumatic. The primary initial symptoms are headache, neck pain, and dizziness. Recently, a 57-year-old woman experienced a severe headache after using a cervical neck traction device. Radiological examination of the head and neck revealed right vertebral artery dissection, which emphasizes the importance of recognizing that using cervical neck traction devices increases the risk of traumatic vertebral artery dissection.

Monolithic high contrast grating on GaSb/AlAsSb based epitaxial structures for mid-infrared wavelength applications.

We demonstrate monolithic high contrast gratings (MHCG) based on GaSb/AlAs0.08Sb0.92 epitaxial structures with sub-wavelength gratings enabling high reflection of unpolarized mid-infrared radiation at the wavelength range from 2.5 to 5 µm. We study the reflectivity wavelength dependence of MHCGs with ridge widths ranging from 220 to 984 nm and fixed 2.6 µm grating period and demonstrate that peak reflectivity of above 0.7 can be shifted from 3.0 to 4.3 µm for ridge widths from 220 to 984 nm, respectively. Maximum reflectivity of up to 0.9 at 4 µm can be achieved. The experiments are in good agreement with numerical simulations, confirming high process flexibility in terms of peak reflectivity and wavelength selection. MHCGs have hitherto been regarded as mirrors enabling high reflection of selected light polarization. With this work, we show that thoughtfully designed MHCG yields high reflectivity for both orthogonal polarizations simultaneously. Our experiment demonstrates that MHCGs are promising candidates to replace conventional mirrors like distributed Bragg reflectors to realize resonator based optical and optoelectronic devices such as resonant cavity enhanced light emitting diodes and resonant cavity enhanced photodetectors in the mid-infrared spectral region, for which epitaxial growth of distributed Bragg reflectors is challenging.

Normative values for hand grip and pinch strength for 6 to 18 year-olds in Saudi Arabia.

BACKGROUND: Normative values for hand grip and pinch strength among children in Saudi Arabia has not been well established. Therefore, the main aim of this study is to establish normative values for hand grip and pinch strength in children aged 6 to 18 years in Saudi Arabia. METHODS: A cross-sectional study was conducted from different 5 regions in Saudi Arabia. Participants between the age of 6 years and 18 years old were recruited through different primary and secondary schools in Saudi Arabia. Data for age, gender, Body Mass Index, and preferred hand were collected. Hand grip strength was measured using digital hand dynamometer and the tip pinch, palmar pinch, and key pinch strength were measured using the hydraulic pinch gauge. RESULTS: A total of 616 participants included in this study (318 boys and 298 girls). Participants were stratified into 5 chronological age groups of 6-7 years, 8-9, 10-11, 12-13, 14-15, 16-17, and 18 years. The results showed an overall trend of increasing hand grip strength and pinch strength with age regardless of hand preference. Boys had significantly higher grip strength than girls in all age groups (P < 0.05). CONCLUSION: This study established normative values for hand grip and pinch strength in the healthy Saudi pediatric and adolescent population, using boys and girls aged 6 to 18. The outcomes of this study also demonstrated that gender, age, and hand preference can all have an impact on how strong a handgrip develops.

Prevalence of lower back pain and its associations with lifestyle behaviors among college students in Saudi Arabia.

BACKGROUND: Lower back pain (LBP) is a common musculoskeletal disorder that may affect students' daily lives. Recent psychological research showed a relevant connection between LBP and multidimensional health. However, the association between LBP and lifestyle behavior has not been established, and improving knowledge in this area may help develop preventive strategies and optimize college students' quality of life. METHODS: A cross-sectional study of 1420 college students in Saudi Arabia was conducted, and participants who attended Saudi Universities were recruited from May 2021 to November 2021. An established validated online survey assessed LBP, sleep quality, time spent sedentary (sedentary duration), health responsibility, physical activity, nutrition, spiritual growth, interpersonal relationships, and stress management. Generalized Linear Regression was used to assess the associations between LBP severity and lifestyle behaviors after controlling for covariates. RESULTS: LBP was prevalent among college students from Saudi Arabia. Most of the sample were young (23.81 ± 6.02), and female (83.7%). There were significant differences between students with and without LBP regarding age, BMI, sex, marital status, pain severity, overall lifestyle behavior, health responsibility, physical activity, nutrition, stress management, and global sleep quality. After controlling for age, BMI, sex, and marital status, there were significant associations between pain severity and global sleep quality (ß=0.2, p < .001, CI: 16 to 0.24), and sedentary duration (ß=0.03, p = .01, CI:0.009 to 0.06). CONCLUSIONS: This study helped define the prevalence of LBP in college students in Saudi Arabia and evaluated the association between LBP and lifestyle behaviors. The findings showed that students with higher levels of poor sleep quality or sedentary behavior had higher levels of pain. Promoting sleep quality and reducing sedentary behavior may help establish preventive strategies for LBP in college students.

Promising score for teaching and learning environment: an experience of a fledgling medical college in Saudi Arabia.

BACKGROUND: Professional competency of graduates of an institute reflects its teaching and learning environment (TLE). This study aimed to provide a preliminary assessment of the TLE at the College of Medicine at Majmaah University. METHODS: A cross-sectional survey was conducted during the 2019-20 academic year among students at the College. A validated scoring tool "the Experience of Teaching and Learning Questionnaire" (available at https://bit.ly/3sVBuEw ) was used. The mean score of each section and statement, the difference between the mean scores of different demographic groups, and correlations between sections were analysed. RESULTS: A total of 234 (72.2%) enrolled students participated in this survey, with a male-to-female ratio and a ratio of participants from basic to clinical years being 2:1 and 1:1, respectively. Most participants reported a GPA of above 3/5. The overall mean score was 3.52/5 points. Section one "approaches to learning and studying" has the highest mean score (3.68), and no section scored a mean below three, though section three "demands made by the course" scored a borderline mean of 3.08. Students in clinical years had a significantly higher overall mean score compared to their counterparts (3.66 vs. 3.39, p < 0.001). CONCLUSIONS: Students at the College had a positive perception of the TLE, but face challenges in coping with the demands of acquiring knowledge and subject-based skills, and in appreciating the TLE especially during basic science years, highlighting the need for an atmosphere that allows them to meet demands and develop greater appreciation.

Translation and Validation of the Arabic Version of the Athlete Psychological Strain Questionnaire.

CONTEXT: The international sports community is becoming more proactive in clinical mental health practice and research. An athlete-specific psychological distress screening tool can identify potential mental health illness. DESIGN: The Athlete Psychological Strain Questionnaire (APSQ) is a simple screening tool for detecting early signs of athlete-specific strain and related mental health concerns. METHODS: We evaluated the internal consistency and reliability of the translated and culturally adjusted Arabic version of the APSQ (APSQ-Ar) with Arabic-speaking elite athletes. The final translation underwent standard forward and backward translation, an inspection by a team of experts, and then preliminary testing. The APSQ-Ar was cross-culturally validated and then assessed for internal consistency and reliability among (n = 98) Arabic-speaking athletes. RESULTS: There were no problems with the patients' understanding or interpretation of the items on the APSQ-Ar translation. The intraclass correlation value was .93 (95% confidence interval, .89-.95), and the mean difference was 2.4 with a minimal detectable change of 5.12, demonstrating strong test-retest reliability. Moreover, Cronbach alpha showed excellent internal consistency (.76). CONCLUSIONS: The APSQ-Ar was demonstrated to be good, reliable, and internally consistent. With APSQ-Ar, sports medicine professionals in Arabic-speaking countries will be able to identify psychological distress and symptoms in athletes and, as a result, provide them with mental health support.

Low-energy laser therapy application on knee joints as an auxiliary treatment in patients with polyarticular juvenile idiopathic arthritis: a dual-arm randomized clinical trial.

Patients with juvenile idiopathic arthritis (JIA) always experience persistent pain and stiffness which induces muscle weakness, fatigue, and functional limitations. This study evaluated whether applying low-energy laser therapy (LLT) on the knee joint could be an effective adjuvant intervention for patients with JIA. Sixty children with polyarticular JIA participated and were randomly allocated to receive either LLT (wavelength λ = 903 nm; power output of 50 mW; and energy of 1.5 J) plus exercises (LLT group) or exercises alone (control group). Pain, peak concentric torque of quadriceps muscles, fatigue, and functional status were measured by the visual analogue scale, isokinetic testing system, Pediatric Quality of Life Inventory Multidimensional Fatigue Scale, and Childhood Health Assessment Questionnaire, respectively pre- and post-intervention, and at 6-month follow-up. Per the mixed-model analysis of variance, the LLT group showed a statistically more favorable improvement in pain (P = .003, ηp2 = .014), fatigue perception (P = .004, ηp2 = .015), and functional status (P = .022, ηp2 = .09) across the three assessment occasions, as compared to the control group. However, no significant difference was demonstrated between both groups concerning peak concentric torque (all P > .05). Incorporation of LLT into the standard physical rehabilitation program for patients with JIA has the potential to induce more conducive improvements in pain, fatigue, and functional performance, but is not effective for improving muscle performance.

Nurses' Perception of Safety Culture in Medical-Surgical Units in Hospitals in Saudi Arabia.

Introduction: Patient safety captures the essence of the primary principle of medical ethics, primum non nocere, first do no harm; this is an important concern in the health care system. Nurses are indispensable members of this system and are the largest group of health care providers involved in the direct delivery of patient care. As an integral part of the health care system, it is important to know nurses' opinions on patient safety culture. Objectives: First, to evaluate and measure the existing safety culture and safety of patients in medical-surgical wards (MSW) in hospitals located in the Qassim region, in the Kingdom of Saudi Arabia. Second, to survey the opinion of registered nurses and supervisors/managers about safety culture and issues concerned with safety in hospitals in the region. Materials and Methods: A validated cross-sectional survey, namely the Hospital Survey on Patient Safety Culture (HSOPSC), was used. This survey queried 300 nurses in different MSWs in four hospitals in the Qassim Region. Results: Overall, a positive culture of safety exists in MSWs, with 69% of RNs rating their wards as having great/excellent safety culture. Notably, some participants felt it was problematic that blame was assigned to nurses for reported errors. While 55.9% of participants noted that all errors or narrowly avoided errors had been reported, less than half actually reported errors in the last year. Conclusion: The perceived safety culture was largely positive; however, the results also indicated that a culture of safety comes with some risk and blame.

Impact of Age and Alberta Stroke Program Early Computed Tomography Score 0 to 5 on Mechanical Thrombectomy Outcomes: Analysis From the STRATIS Registry.

BACKGROUND AND PURPOSE: This study investigates clinical outcomes after mechanical thrombectomy in adult patients with baseline Alberta Stroke Program Early CT Score (ASPECTS) of 0 to 5. METHODS: We included data from the STRATIS Registry (Systematic Evaluation of Patients Treated With Neurothrombectomy Devices for Acute Ischemic Stroke) from patients who underwent mechanical thrombectomy within 8 hours of symptom onset and had available ASPECTS data adjudicated by an independent core laboratory. Angiographic and clinical outcomes were collected, including successful reperfusion (modified Thrombolysis in Cerebral Infarction ≥2b), functional independence (modified Rankin Scale score 0-2), 90-day mortality, and symptomatic intracranial hemorrhage at 24 hours. Outcomes were stratified by ASPECTS scores and age. RESULTS: Of the 984 patients enrolled, 763 had available ASPECTS data. Of these patients, 57 had ASPECTS of 0 to 5 with a median age of 63 years (interquartile range, 28-100), whereas 706 patients had ASPECTS of 6 to 10 with a median age of 70 years of age (interquartile range, 19-100). Ten patients had ASPECTS of 0 to 3 and 47 patients had ASPECTS of 4 to 5 at baseline. Successful reperfusion was achieved in 85.5% (47/55) in the ASPECTS of 0 to 5 group. Functional independence was achieved in 28.8% (15/52) in the ASPECTS of 0 to 5 versus 59.7% (388/650) in the 6 to 10 group (P<0.001). Mortality rates were 30.8% (16/52) in the ASPECTS of 0 to 5 and 13.4% (87/650) in the 6 to 10 group (P<0.001). sICH rates were 7.0% (4/57) in the ASPECTS of 0 to 5 and 0.9% (6/682) in the 6 to 10 group (P<0.001). No patients aged >75 years with ASPECTS of 0 to 5 (0/12) achieved functional independence versus 44.8% (13/29) of those age ≤65 (P=0.005). CONCLUSIONS: Patients <65 years of age with large core infarction (ASPECTS 0-5) have better rates of functional independence and lower rates of mortality compared with patients >75 years of age. Registration: URL: https://www.clinicaltrials.gov; Unique identifier: NCT02239640.

Prevalence of frailty and associated factors among Saudi community-dwelling older adults: a cross-sectional study.

BACKGROUND: Prevalence of frailty has been previously established in different Western countries; however, the prevalence and the burden of in the aging populations of Saudi Arabia has not been examined. Therefore, the aim of this study was to examine the prevalence of frailty, and associated factors among Saudi older population. METHODS: The study included a total of 486 community-dwelling elderly adults aged 60 years and over living in the Riyadh area. This study took place from August 2019 to June 2020. The prevalence of frailty was determined using the Fried's frailty phenotype. Association between sociodemographic features and clinical factors and frailty was estimated by Odds Ratio and confidence intervals (OR, IC 95%) using a multinomial logistic regression model. RESULTS: The overall prevalence of pre-frailty and frailty were 47.3 and 21.4%, respectively. The following factors were associated with being frail: age (OR: 6.92; 95%CI 3.11-15.41); living alone (OR: 2.50; 95%CI: 1.12-5.59); had more chronic conditions (OR: 1.96; 95%CI: 1.16-3.30); and cognitive impairment (OR: 7.07; 95%CI: 3.92-12.74). CONCLUSIONS: The Compared with other populations, the prevalence of frailty and pre-frailty in the Riyadh region of Saudi Arabia was high. The implications of frailty in this population should be discussed in future study.

Incidence of stroke among Saudi population: a systematic review and meta-analysis.

BACKGROUND AND AIMS: Stroke is a leading cause of death and disability worldwide. However, our knowledge of the incidence of stroke for Saudi Arabian population is not known. Thus, we aimed to determine the pooled annual incidence of stroke in Saudi Arabia. We conducted a comprehensive literature search of PubMed, Web of Science, and SCOPUS, without language or publication year limits. Outcomes of interest were stroke incidence rate for both first and recurrent. A total of five studies met the inclusion criteria for this review. The pooled annual incidence of stroke in Saudi Arabia was 0.029% (95% CI: 0.015 to 0.047) equivalent of 29 strokes per 100,000 people annually (95% CI: 15 to 47). CONCLUSION: The findings indicate that there are 29 stroke cases for every 100,000 people annually for individuals residing Saudi Arabia. Our values were lower than those of other high-income countries. Establishing a nationwide stroke registry is warranted for monitoring and improving healthcare services provided to stroke survivors.

Psychometric properties of instrumented postural sway measures recorded in community settings in independent living older adults.

BACKGROUND: In the last few decades, research related to balance in older adults has been conducted in lab-based settings. The lack of portability and high cost that is associated with the current gold standard methods to quantify body balance limits their application to community settings such as independent living facilities. The purpose of the study was to examine the relative and absolute reliability and the convergent validity of static standing balance performance using an accelerometer device. METHODS: A total of 131 participants (85% female, mean age 80 ± 8 years) were included for the validity aim, and a subsample of 38 participants were enrolled in the reliability testing (89% female, mean age 76 ± 7 years). The root-mean-square (RMS) and normalized path length (NPL) for sway in antero-posterior (AP) and medio-lateral (ML) directions were calculated for different standing balance conditions. Test-retest reliability was assessed over two testing visits occurring 1 week apart using the intraclass correlation coefficient (ICC) for relative reliability, and the minimal detectable change (MDC) was calculated for the absolute reliability. Spearman's rank correlation coefficient was used to test convergent validity at baseline between balance measurements and related mobility measures. RESULTS: Reliability of balance performance using accelerometers was good to excellent with ICC values ranging from 0.41 to 0.83 for RMS sway and from 0.49 to 0.82 for NPL sway. However, the ICC during semi-tandem stance in A-P direction was 0.35, indicating poor reliability. The MDC of the sway measurements ranged from 2.4 to 9.4 for the RMS and 5.2 to 13.8 for the NPL. Balance measurements were correlated with mobility measurements. CONCLUSIONS: Using a portable accelerometer to quantify static standing postural control provides reliable measurements in community settings.

Impact of caffeine on metabolic activity and biofilm formation of Candida albicans on acrylic denture resin in the presence of nicotine.

STATEMENT OF PROBLEM: Candida albicans has been implicated in denture stomatitis, and this effect is exacerbated by nicotine exposure. However, studies have also suggested that caffeine exposure inhibits the growth of C. albicans. The interaction effects of nicotine and caffeine are not yet clear on the growth of C. albicans. PURPOSE: The purpose of this in vitro study was to determine the effect of caffeine on metabolic activity and biofilm formation of C. albicans growing on acrylic denture resin while simultaneously exposed to nicotine and, if an effect were to be identified, whether this effect would vary depending on the caffeine concentration. MATERIAL AND METHODS: A total of 240 acrylic resin specimens were divided into 2 equal groups (120 each). Specimens in one group were processed to measure C. albicans metabolic activity, and those in the other group were processed to measure C. albicans biofilm attachment. Ten subgroups (n=12) were established within each group with different concentration combinations of nicotine and caffeine to test the interaction effect. The first subgroup was designed as a negative control, containing 0 mg/mL of nicotine and caffeine. The following subgroups all contained 8.00 mg/mL of nicotine, and the caffeine concentrations were prepared at the following 9 levels: 0, 0.25, 0.50, 1.00, 2.00, 4.00, 8.00, 16.00, and 32.00 mg/mL. Metabolic activity was measured by using a 2,3-bis (2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-carboxanilide (XTT) assay. Biofilm attachment was measured by using spiral plating and calculated in terms of the number of colony-forming units (CFUs)/mL. Descriptive statistics and a 2-way ANOVA were conducted to determine whether the concentrations of nicotine and caffeine used affected the biofilm attachment and metabolic activity of C. albicans (α=.05). RESULTS: The presence of 8 mg/mL of nicotine increased the metabolic activity and biofilm formation of C. albicans. When compared with the 0 mg/mL of caffeine and 8.00 mg/mL of nicotine group, caffeine from 1.00 to 4.00 mg/mL significantly increased C. albicans biofilm metabolic activity. Caffeine at 16.00 and 32.00 mg/mL significantly decreased C. albicans biofilm metabolic activity in the presence of 8 mg/mL of nicotine. Caffeine from 1.00 to 32.00 mg/mL significantly decreased the biofilm formation of C. albicans in the presence of 8 mg/mL of nicotine. CONCLUSIONS: The presence of 8 mg/mL of nicotine alone increased the metabolic activity and biofilm formation of C. albicans. In the presence of 8 mg/mL of nicotine with different caffeine concentrations, the results suggest that, overall, caffeine at higher concentrations (16 and 32 mg/mL) inhibited the metabolic activity and biofilm formation of C. albicans on acrylic denture resin most.

Plyometric exercises: subsequent changes of weight-bearing symmetry, muscle strength and walking performance in children with unilateral cerebral palsy.

OBJECTIVE: To evaluate the subsequent effects of plyometric training on weight-bearing symmetry, muscle strength, and gait performance in children with unilateral cerebral palsy. METHODS: Thirty-nine children with spastic hemiplegia (age 8-12 years) were randomly divided into either the PLYO group (n=19, received a 30-minute plyometric exercise program plus the traditional physical rehabilitation, twice/week for eight consecutive weeks) or Non-PLYO group (n=20, received the traditional physical rehabilitation only). The weight-bearing symmetry index (WB-SI), maximum isometric muscle strength (MIMS) of quadriceps and hamstring muscles, and spatial-temporal gait parameters were assessed pre and post-intervention. RESULTS: From pre- to post-intervention, changes of WB-SI among PLYO and Non-PLYO groups did not differ significantly (P=.81; hindfoot and P=.23; forefoot). MIMS of quadriceps and hamstring muscles at 90° knee flexion (P=.008 and .013 respectively) increased significantly in PLYO compared to Non-PLYO group. Walking speed (P=.033), stride length (P=.002), and step time (P<.001) improved markedly in PLYO group more than in Non-PLYO group. The proportion of single leg support (P=.14) among PLYO and Non-PLYO groups did not differ significantly. CONCLUSION: Addition of plyometric exercises to the physical rehabilitation programs of children with unilateral CP could achieve greater improvement in muscles strength and walking performance, but not in WB-SI.

Psychometric Properties of Lower Extremity Strength Measurements Recorded in Community Settings in Independent Living Older Adults.

BACKGROUND: A uniaxial load cell device provides an alternative, easy and inexpensive way to quantify muscle strength in different settings outside the clinic and research labs. So, the purpose of the study was to examine the test-retest reliability and the construct validity of lower extremity strength performance using an uniaxial load cell device. METHODS: A total of 131 subjects (85% female, mean age 80 ± 8 years) were included for the validity aim, and a sample of 38 subjects were enrolled in the reliability testing (89% female, mean age 76 ± 7 years). For the strength measurements were assessed with a portable load cell for three consecutive trials. Test-retest reliability was assessed over two testing visits occurring one week apart. Spearman's rank correlation coefficient was used to test convergent validity with other mobility-related measurements construct validity at baseline. RESULTS: Strength measurements showed good to excellent reliability in most of the measured parameters with intraclass correlation coefficients range from 0.89 to 0.99 and were correlated with mobility measurements with Spearman rho range from 0.21 to 0.38. CONCLUSION: The portable uni-axial load cell to measure lower extremity strength provides reliable measurements in community settings.

Health-related quality of life and long-term outcomes after endoscopic therapy for walled-off pancreatic necrosis.

BACKGROUND AND AIM: Walled-off pancreatic necrosis (WON) frequently develops after necrotizing pancreatitis. Endoscopic drainage has become the preferred modality for symptomatic or infected WON. The aim of the present study was to assess health-related quality of life (HR-QOL) and long-term outcomes in patients undergoing endoscopic drainage for WON. METHODS: Patients undergoing endoscopic drainage of WON from January 2006 to May 2016 were identified. Data recorded included demographic information, and the incidence of long-term sequelae including pancreatic endocrine and exocrine insufficiency. Attempts were made to contact all patients. HR-QOL was assessed using the SF-36 questionnaire. RESULTS: Eighty patients were analyzed, 41 (51.3%) of whom completed the SF-36. One-year all-cause mortality was 6.2%, and disease-related mortality was 3.7%. A notable proportion of patients developed exocrine insufficiency (32.5%), endocrine insufficiency (27.7%), and long-term opiate use (42.5%). Development of exocrine insufficiency was predictive of lower total SF-36 scores (P = 0.016). Patients with WON had better HR-QOL compared with cohorts of irritable bowel syndrome (IBS) and inflammatory bowel disease (IBD). In patients developing exocrine insufficiency versus healthy controls, poorer scores in the physical role (P < 0.001), general health (P < 0.001), vitality (P = 0.001), and emotional role (P = 0.029) domains were observed. Exocrine insufficiency patients had better HR-QOL than the IBS and IBD cohorts, although these differences were less pronounced. CONCLUSION: After undergoing endoscopic drainage for WON, patients have relatively preserved HR-QOL. The subset of patients that develop exocrine insufficiency have significantly poorer HR-QOL compared to healthy controls, although not to the degree of chronic gastrointestinal disorders such as IBS and IBD.