Tag: statistics

PLoS One. 2022 Feb 22;17(2):e0264290. doi: 10.1371/journal.pone.0264290. eCollection 2022.

ABSTRACT

BACKGROUND: In times of the global corona pandemic health care workers (HCWs) fight the disease at the frontline of healthcare services and are confronted with an exacerbated load of pandemic burden. Psychosocial resources are thought to buffer adverse effects of pandemic stressors on mental health. This rapid review summarizes evidence on the specific interplay of pandemic burden and psychosocial resources with regard to the mental health of HCWs during the COVID-19 pandemic. The goal was to derive potential starting points for supportive interventions.

METHODS: We conducted a rapid systematic review following the recommendations of the Cochrane Rapid Reviews Methods Group. We searched 7 databases in February 2021 and included peer-reviewed quantitative studies, that reported related data on pandemic stressors, psychosocial resources, and mental health of HCWs.

RESULTS: 46 reports were finally included in the review and reported data on all three outcomes at hand. Most studies (n = 41) applied a cross-sectional design. Our results suggest that there are several statistically significant pandemic risk factors for mental health problems in HCWs such as high risk and fear of infection, while resilience, active and emotion-focused coping strategies as well as social support can be considered beneficial when protecting different aspects of mental health in HCWs during the COVID-19 pandemic. Evidence for patterns of interaction between outcomes were found in the context of coping style when facing specific pandemic stressors.

CONCLUSIONS: Our results indicate that several psychosocial resources may play an important role in buffering adverse effects of pandemic burden on the mental health of HCWs in the context of the COVID-19 pandemic. Nevertheless, causal interpretations of mentioned associations are inadequate due to the overall low study quality and the dominance of cross-sectional study designs. Prospective longitudinal studies are required to elucidate the missing links.

PMID:35192662 | DOI:10.1371/journal.pone.0264290

PLoS One. 2022 Feb 22;17(2):e0263664. doi: 10.1371/journal.pone.0263664. eCollection 2022.

ABSTRACT

Given challenges with adherence to existing HIV prevention products, the development of an extended duration vaginal ring could improve adherence while reducing patient and provider burden. Additionally, women have other interlinked sexual health concerns such as unintended pregnancy. We evaluated acceptability of a 90-day ring to prevent HIV and hypothetical preferences for a dual (HIV and contraceptive) indication. This was a secondary analysis of a Phase 1, two-arm, multi-site, placebo-controlled randomized trial evaluating safety and pharmacokinetics of a 90-day vaginal ring containing tenofovir for HIV prevention (N = 49). We used a mixed methods approach to assess quantitative data on acceptability (n = 49) and used qualitative data from a random subset to explain the quantitative findings (N = 25). The 3-month extended duration tenofovir ring was highly acceptable. Participants perceived the ring to be easy to use, comfortable and reported liking it more over time. About half felt the ring during sex but most of those participants said it bothered them only a little. Concerns about hygiene increased over the study period but were often outweighed by the benefits of an extended duration ring. Interest in a multi-purpose ring was high (77%) and even higher among those who were sexually active and had male partners. The 3-month extended duration tenofovir ring for HIV prevention was highly acceptable among women and interest in an MPT was high.

PMID:35192655 | DOI:10.1371/journal.pone.0263664

PLoS One. 2022 Feb 22;17(2):e0264323. doi: 10.1371/journal.pone.0264323. eCollection 2022.

ABSTRACT

OBJECTIVES: The purpose of this study was to evaluate the COVID-19 vaccination experience among United States-based dental professionals and students: to understand their beliefs, concerns, safety and confidence levels, and side effects experienced after vaccination; striving to boost vaccination acceptability to curtail the pandemic.

METHODS: An observational survey study approved by The University of Texas Health San Antonio Institutional Review Board was distributed to members of the School of Dentistry community using Qualtrics XM software. The survey was completed anonymously. Data were analyzed using R statistical computing software, χ2 test and Fisher’s Exact test.

RESULTS: Over 80% of all participants felt moderately to very safe working after the COVID-19 vaccine was made available, and more than 75% were moderately to very confident that the vaccine can protect them during the pandemic. At least 35% were moderately to very concerned about immediate and long-term side effects of the vaccine; despite the concerns, 94% received the vaccine. Side effects were more common after the second dose of the vaccine. Most common side effects were injection site pain, and general side effects of fatigue/tiredness, headache, muscle/body ache, and chills/fever. 74% reported no effect of the vaccine on daily activities, and the severity of side effects no worse than mild (about 60%).

CONCLUSIONS: Majority of the participants felt safe and confident that the vaccine would protect them against COVID-19 infection. Sharing these findings and reliable information that the vaccine is safe and effective is paramount to fostering the vaccine uptake and curtailing the pandemic.

PRACTICAL IMPLICATIONS: Findings of this study demonstrated the confidence of the UT Health San Antonio, School of Dentistry community that the benefits of the vaccines greatly outweigh the risks; boosting the vaccination acceptance while creating a COVID-19 free environment both for the academic dental setting and the community it serves.

PMID:35192657 | DOI:10.1371/journal.pone.0264323

PLoS One. 2022 Feb 22;17(2):e0264181. doi: 10.1371/journal.pone.0264181. eCollection 2022.

ABSTRACT

Low-power consumption has been always a crucial design constraint for an efficient intellectual property based three-dimensional multi-core system that cannot be ignored easily. As the complexity increases due to the number of cores/stacks/ layers in 3D digital systems, the challenges to handle power can be more difficult at a high abstraction level. Therefore, the low-power approach gives designers an opportunity to estimate and optimize the power consumption in the early stages of design phases. The accurate power estimation through the macro-modeling approach at high-level reduces the risk of redesign cycle and turn-around time. In this research, we have presented an improved statistical macro-modeling approach that estimates power through statistical characteristics of randomly generated input patterns by using Biogeography Based Optimization. These input patterns propagate signals into an IP-based 3D digital test system. In experiments, the test system is based on four 8 to 32- bits heterogeneous cores. The response of the power is monitored by applying the well-known Monte Carlo Simulation technique. The entire power estimation method is performed in two major steps. First, the average power is estimated for an IP-based individual core. Second, the average power for bus-based Through-Silicon-Via is estimated. Finally, the cores and B-TSVs are integrated together to construct a 3D system. Then the average power for complete test systems is estimated. The experimental results of the statistical power macro-model are compared with the commercial Electronic Design Automation power simulator at the operating frequency of 100 MHz. The average percentage error of the test system is calculated as 8.65%. For the validation of these results, the statistical error analysis is additionally performed and reveals that our proposed macro-model is accurate in terms of percentage of error with a feasible amount of time.

PMID:35192654 | DOI:10.1371/journal.pone.0264181

PLoS Negl Trop Dis. 2022 Feb 22;16(2):e0010183. doi: 10.1371/journal.pntd.0010183. Online ahead of print.

ABSTRACT

BACKGROUND: Snakebite is a neglected problem with a high mortality in India. There are no simple clinical prognostic tools which can predict mortality in viper envenomings. We aimed to develop and validate a mortality-risk prediction score for patients of viper envenoming from Southern India.

METHODS: We used clinical predictors from a prospective cohort of 248 patients with syndromic diagnosis of viper envenoming and had a positive 20-minute whole blood clotting test (WBCT 20) from a tertiary-care hospital in Puducherry, India. We applied multivariable logistic regression with backward elimination approach. External validation of this score was done among 140 patients from the same centre and its performance was assessed with concordance statistic and calibration plots.

FINDINGS: The final model termed VENOMS from the term “Viper ENvenOming Mortality Score included 7 admission clinical parameters (recorded in the first 48 hours after bite): presence of overt bleeding manifestations, presence of capillary leak syndrome, haemoglobin <10 g/dL, bite to antivenom administration time > 6.5 h, systolic blood pressure < 100 mm Hg, urine output <20 mL/h in 24 h and female gender. The lowest possible VENOMS score of 0 predicted an in-hospital mortality risk of 0.06% while highest score of 12 predicted a mortality of 99.1%. The model had a concordance statistic of 0·86 (95% CI 0·79-0·94) in the validation cohort. Calibration plots indicated good agreement of predicted and observed outcomes.

CONCLUSIONS: The VENOMS score is a good predictor of the mortality in viper envenoming in southern India where Russell’s viper envenoming burden is high. The score may have potential applications in triaging patients and guiding management after further validation.

PMID:35192642 | DOI:10.1371/journal.pntd.0010183

PLoS One. 2022 Feb 22;17(2):e0263333. doi: 10.1371/journal.pone.0263333. eCollection 2022.

ABSTRACT

Obesity, associated with having excess body fat, is a critical public health problem that can cause serious diseases. Although a range of techniques for body fat estimation have been developed to assess obesity, these typically involve high-cost tests requiring special equipment. Thus, the accurate prediction of body fat percentage based on easily accessed body measurements is important for assessing obesity and its related diseases. By considering the characteristics of different features (e.g. body measurements), this study investigates the effectiveness of feature extraction for body fat prediction. It evaluates the performance of three feature extraction approaches by comparing four well-known prediction models. Experimental results based on two real-world body fat datasets show that the prediction models perform better on incorporating feature extraction for body fat prediction, in terms of the mean absolute error, standard deviation, root mean square error and robustness. These results confirm that feature extraction is an effective pre-processing step for predicting body fat. In addition, statistical analysis confirms that feature extraction significantly improves the performance of prediction methods. Moreover, the increase in the number of extracted features results in further, albeit slight, improvements to the prediction models. The findings of this study provide a baseline for future research in related areas.

PMID:35192644 | DOI:10.1371/journal.pone.0263333

PLoS One. 2022 Feb 22;17(2):e0263431. doi: 10.1371/journal.pone.0263431. eCollection 2022.

ABSTRACT

BACKGROUND: Adolescents are currently becoming sexually active before their 18th birthday during which they have to battle with unsafe sexual behaviours, teenage pregnancies, sexually transmitted infections (STIs), and school dropouts. The trend is linked with low soft skills (self-esteem and assertiveness skills) for them to make informed, reasoned, and responsible decisions over sexual activities. This study designed and tested the effect of integrated reproductive health (RH) lesson materials in a problem-based pedagogy (PBP) to enhance soft skills for safe sexual behaviour among adolescents in Tanzania.

METHODS: A double-blinded clustered randomized controlled trial was conducted between September 2019 and September 2020 among 660 randomly selected adolescents. A Sexual-risk Behaviour Beliefs and Self-esteem Scale adopted from previous studies measured soft skills for safe sexual behaviour. A descriptive statistical analysis was performed by using the statistical analysis software programme version 9.4. The effect of the intervention was determined using Linear Mixed Model set at α error probability = 5% significance level (95% confidence interval) and a β error probability = 0.80.

FINDINGS: Adolescents’ mean age was 15±1.869 with 57.5% females. The end-line findings indicated that the coefficient of soft skills was significantly higher among adolescents in the hybrid PBP (β=9.0986, p<0.01; 95%CI: 4.7772, 14.2311) and pure PBP (β =8.7114, p<0.01; 95%CI: 3.9990, 10.1208) than in the control group. The retention rate of soft skills was still significantly higher at 3-months follow-up (β=2.0044; p<0.01; 95%CI: 1.0234, 4.1182) and at 6-months follow-up (β=1.9803; p<0.01; 95%CI: 0.8399, 3.1099) compared to the baseline and immediate post-intervention assessments.

CONCLUSION: The intervention substantially enhanced soft skills for safe sexual behaviour among adolescents of both sex. Despite the fact that scores for soft skills varied across the study timelines, adolescents demonstrated significant intentions to abstain from sexual intercourse, delay sexual relationships, negotiate condom use, and withstand sexual coercions. The PBP may need to be incorporated in ordinary level secondary school curricula as a formal guide to teachers and or health workers to optimally prepare adolescents for their healthy adulthood.

PMID:35192640 | DOI:10.1371/journal.pone.0263431

PLoS One. 2022 Feb 22;17(2):e0262911. doi: 10.1371/journal.pone.0262911. eCollection 2022.

ABSTRACT

BACKGROUND: COVID-19 pandemic resulted in about 165 million infections and 3.4 million deaths all over the world across 15 months. The most severe clinical presentation of COVID-19 diseases is interstitial pneumonia.

METHODS: In this paper we describe clinical outcomes based on radiological features as well as the pattern of haematochemical parameters and IgG/IgM antibodies in 75 patients hospitalized due to COVID-related interstitial pneumonia not requiring intensive care assistance. Each patient underwent routine laboratory tests, including inflammatory markers and coagulation profile at baseline. Computed Tomography (CT) was performed at baseline and after 3 months to assess the persistence of radiological sequelae. A Generalized Linear Model (GLM) was used to test for each patient the association between individual haematochemical parameters at the time of hospital admission and the subsequent radiological features after three months. The presence of IgG antibodies was quantitatively determined in 70 patients at the time of hospital admission and after 3 months. A subgroup of 49 and 21 patients underwent additional dosage of IgG after 6 and 12 months, respectively. IgM serological antibodies were available for 17 patients at baseline and 61 at T3, with additional follow-up for 51 and 20 subjects after 6 and 12 months, respectively.

RESULTS: Only 28 out of 75 patients discharged from the hospital were totally healed after 3 months, while 47 patients (62.7%) still presented radiological sequelae. According to the GLM model, specific haematochemical baseline parameters-such as IL-6, GPT, platelets and eosinophil count-showed a statistically significant association with the presence of radiological sequelae at month 3 highlighting an OR = 0.5, thus meaning that subjects completely healed after 3 months presented half levels of IL-6 at baseline compared to patients with sequelae. In general, IgG serum levels were always higher than IgM at the time of hospitalization (75% at T0; n = 12 out of 16 patients with data available in both visits), after 3 months (72.1%; n = 44 out of 61 pts.), after 6 months (56.8%; 25 out of 44 pts.), and one year after hospitalization (60%; 12 out of 20 pts.). Overall, IgG and IgM serum levels presented a statistically significant decreasing trend from the baseline to month 3, 6 and 12. One patient presented an increase in IgM between baseline and month 3 but negative PCR test for SARS-COV2 on throat swab.

CONCLUSIONS: As supported by our findings on 75 patients, COVID-related interstitial pneumonia triggers early IgG levels (higher than IgM) that gradually decrease over 12 months. Mid-term sequelae are still detectable at lung Computed Tomography after 3 months from the hospital admission. Occasionally, it is possible to observe increase of IgM levels in presence of low concentrations of IgG and negative PCR ELISA tests for SARS-COV2 RNA. Baseline levels of IL-6 could be proposed as predictor of radiological mid/long-term sequelae after COVID-related interstitial pneumonia.

PMID:35192635 | DOI:10.1371/journal.pone.0262911

PLoS One. 2022 Feb 22;17(2):e0259329. doi: 10.1371/journal.pone.0259329. eCollection 2022.

ABSTRACT

By identifying homogeneity in bone and soft tissue covariation patterns in living hominids, it is possible to produce facial approximation methods with interspecies compatibility. These methods may be useful for producing facial approximations of fossil hominids that are more realistic than currently possible. In this study, we conducted an interspecific comparison of the nasomaxillary region in chimpanzees and modern humans with the aim of producing a method for predicting the positions of the nasal tips of Plio-Pleistocene hominids. We addressed this aim by first collecting and performing regression analyses of linear and angular measurements of nasal cavity length and inclination in modern humans (Homo sapiens; n = 72) and chimpanzees (Pan troglodytes; n = 19), and then performing a set of out-of-group tests. The first test was performed on four subjects that belonged to the same genus as the training sample, i.e., Homo (n = 2) and Pan (n = 2), and the second test, which functioned as an interspecies compatibility test, was performed on Pan paniscus (n = 1), Gorilla gorilla (n = 3), Pongo pygmaeus (n = 1), Pongo abelli (n = 1), Symphalangus syndactylus (n = 3), and Papio hamadryas (n = 3). We identified statistically significant correlations in both humans and chimpanzees with slopes that displayed homogeneity of covariation. Prediction formulae combining these data were found to be compatible with humans and chimpanzees as well as all other African great apes, i.e., bonobos and gorillas. The main conclusion that can be drawn from this study is that our set of regression models for approximating the position of the nasal tip are homogenous among humans and African apes, and can thus be reasonably extended to ancestors leading to these clades.

PMID:35192639 | DOI:10.1371/journal.pone.0259329

PLoS One. 2022 Feb 22;17(2):e0260840. doi: 10.1371/journal.pone.0260840. eCollection 2022.

ABSTRACT

BACKGROUND: Many health risks in pregnant women and their foetuses can be reduced by practicing antenatal exercise. However, the adequate practice of antenatal exercise among pregnant women is low in Ethiopia. Therefore, this study aimed to assess the practice of antenatal exercise and its associated factors among pregnant women in Arba Minch town.

METHODS: A community-based cross-sectional study design was conducted. Data were collected by using a structured questionnaire from 422 pregnant women selected by a simple random sampling technique. Descriptive statistics were computed and a binary logistic regression model was fitted. In multivariable logistic-regression adjusted odds ratio (AOR) with 95% confidence intervals were used to determine the strength of associations. The significance level was declared at a p-value < 0.05.

RESULTS: Among 410 participants, 32.9% (95% CI 28%-37%) adequately practiced antenatal exercise. Factors negatively associated with an adequate antenatal exercise were husband’s primary school level [Adjusted odds ratio (AOR) = 0.3, (95% CI: 0.1, 0.7)], history of miscarriage [AOR = 0.3, (95% CI: 0.1, 0.7)], inadequate knowledge [AOR = 0.2, (95% CI: 0.1, 0.3)], and unfavorable attitude [AOR = 0.3, (95% CI 0.2, 0.5)]. Whereas, factors positively associated with an adequate antenatal exercise were employment status of women [AOR = 4.8, (95% CI: 1.8, 13.1)], and a practice of regular exercise before current pregnancy [AOR = 1.9, (95% CI: 1.1, 3.2)].

CONCLUSIONS: The findings of this study indicated that adequate practice of antenatal exercise was found to be low. Appropriate measures should be taken to improve the husband’s educational level, mother’s occupation, knowledge, and attitudes towards antenatal exercise. Special consideration should be given to those with a history of miscarriage and women should be encouraged to practice regular exercise before pregnancy.

PMID:35192634 | DOI:10.1371/journal.pone.0260840