Category: Statistics

Arthritis Res Ther. 2022 Dec 28;24(1):283. doi: 10.1186/s13075-022-02944-1.

ABSTRACT

BACKGROUND: Psoriatic arthritis (PsA) patient data from two phase 3 secukinumab trials (FUTURE 1, 5) were analysed to quantify the prevalence and extent of pre-existing radiographic damage (RD) at baseline; investigate the association of RD with swollen/tender joint counts (SJC/TJC) at baseline; and investigate the extent to which RD at baseline correlated with response to secukinumab.

METHODS: Pooled data (N = 1554) provided baseline radiographic bone erosion and joint space narrowing (JSN) scores at pre-specified locations per the van der Heijde-modified total Sharp score (vdH-mTSS) for PsA and swollen and tender joint scores in the same joints at multiple visits. Overall patient RD and individual joints RD bone erosion and JSN scores were assessed. The association between joint activity (tenderness, swelling) and vdH-mTSS was assessed at the overall patient-level and individual joint tender, swollen scores (yes/no) and RD joint JSN and bone erosion scores at the individual joint-level. Treatment response was assessed using SJC/TJC at weeks 16 and 52 and the proportion of patients achieving minimal disease activity (MDA) over all assessments within 1 year from FUTURE 5 alone.

RESULTS: A substantial prevalence of pre-existing RD with higher prevalence of erosion than JSN was observed (86% and 60% of patients had positive erosion and JSN scores, respectively); higher RD prevalence was associated with longer time since PsA diagnosis. Joint activity was weakly associated with RD at baseline at the patient-level (Pearson’s coefficients: range 0.12-0.18), but strongly associated at the individual joint-level, with a higher probability of tender/swollen joints to associate with higher JSN/erosion scores: all 42 analysed joints showed statistical significance at the 0.05 level (unadjusted) for the relationship between joint tenderness (yes/no) and its JSN score, all but one for tenderness and bone erosion scores, and all but 2 for swollen and JSN scores and for swollen and bone erosion score. Secukinumab (150/300 mg), reduced TJC and SJC across all values of baseline erosion and JSN scores at weeks 16 and 52. Patients with higher levels of RD were less likely to achieve zero tender/zero swollen joint status and had lower chance of achieving MDA.

CONCLUSIONS: PsA patients showed substantial prevalence of RD at baseline that correlated with time since diagnosis, but patient’s individual joint activity was strongly associated with pre-existing RD at those joints. Patients with the highest RD at baseline had a reduced likelihood of achieving zero joint count status.

PMID:36578042 | DOI:10.1186/s13075-022-02944-1

BMC Ophthalmol. 2022 Dec 28;22(1):512. doi: 10.1186/s12886-022-02753-9.

ABSTRACT

BACKGROUND: To ascertain the agreement of corneal aberrations obtained from the Pentacam and the KR-1W in myopic populations and to investigate the influence of the level of myopia as well as the laterality on the agreement.

METHODS: In this observational study, a rotating Scheimpflug camera (Pentacam AXL) and a Hartmann-Shack wavefront analyzer with Placido-disc topographer (KR-1W) were used to measure the aberrations of myopes in the anterior corneal surface by one experienced operator. All examinations were computed across a 6 mm diameter. Six subgroups were generated according to the degree of myopia (mild, moderate, and severe myopia) and the laterality of eyes (right and left eyes).

RESULTS: The study included 245 eyes of 170 participants. For certain anterior corneal aberrations, statistically significant differences existed between the Pentacam and the KR-1W (all P < .05). The values of Zernike (Z)(2,0), Z(2,2), Z(3,1), and Z(4,0) varied in all levels of myopia regardless of the laterality, with the values of the Pentacam constantly larger than the KR-1W in the measurement of Z(2,0), Z(2,2), and Z(4,0). For 2nd to 6th aberrations, both instruments correlated poorly to moderately. The width of limits of agreement between the two instruments was clinically too wide (> 0.1 μm) for aberrations closely correlated with visual quality, including Z(3, ± 3), Z(3, ± 1), and Z(4,0), and almost all aberrations, indicating poor agreement.

CONCLUSIONS: In clinical practice, the Pentacam based on Scheimpflug technology and the KR-1W based on Placido Disc System are not interchangeable in measuring anterior corneal aberration for myopes regardless of myopia degree and the laterality, suggesting that a consistent instrument should be selected for surgical design as well as follow-up.

PMID:36578031 | DOI:10.1186/s12886-022-02753-9

Trials. 2022 Dec 28;23(1):1058. doi: 10.1186/s13063-022-06900-x.

ABSTRACT

RATIONALE: The effectiveness of universal immunisation with pneumococcal conjugate vaccine (PCV) has been evident in many countries. However, the global impact of PCV is limited by its cost, which has prevented its introduction in several countries. Reducing the cost of PCV programmes may facilitate vaccine introduction in some countries and improve the sustainability of PCV in EPIs in low-income countries when they transition away from subsidised vaccine supply.

METHODS AND DESIGN: PVS is a real-world field trial of an alternative schedule of one dose of PCV scheduled at age 6 weeks with a booster dose at age 9 months (i.e. the alternative ‘1+1’ schedule) compared to the standard schedule of three primary doses scheduled at 6, 10, and 14 weeks of age (i.e. the standard ‘3+0’ schedule). Delivery of the interventions began in late 2019 in 68 geographic clusters and will continue for 4 years. The primary endpoint is the prevalence of nasopharyngeal vaccine-type pneumococcal carriage in children aged 2-260 weeks with clinical pneumonia in year 4. Secondary endpoints are the prevalence of vaccine-type pneumococcal carriage among all ages in year 4 and the incidence of radiological pneumonia in children enrolled to receive the interventions. Additional disease and carriage endpoints are included.

PURPOSE: This statistical analysis plan (SAP) describes the cohorts and populations, and follow-up criteria, to be used in different analyses. The SAP defines the endpoints and describes how adherence to the interventions will be presented. We describe how analyses will account for the effect of clustering and stratified randomisation. The SAP defines the approach to non-inferiority and other analyses. Defining the SAP early in the trial will avoid bias in analyses that may arise from prior knowledge of trial findings.

PMID:36578030 | DOI:10.1186/s13063-022-06900-x

BMC Complement Med Ther. 2022 Dec 28;22(1):342. doi: 10.1186/s12906-022-03797-6.

ABSTRACT

BACKGROUND: Bangladesh’s population commonly utilizes Complementary and alternative medicine (CAM) to treat their health issues. Despite the increasing interest in CAM, it has been excluded from conventional medical training in Bangladesh for many years. Therefore, this study assessed and compared the knowledge level, attitude, perceived effectiveness, and self-practice of CAM among undergraduate students of Bangladesh.

METHODS: This cross-sectional group comparison study was conducted among undergraduate (both medical and non-medical) students of Bangladesh between November and December 2021. Data was collected using a self-reported pretested semi-structured online questionnaire. The questionnaire contained questions regarding background information, knowledge regarding CAM, source of CAM knowledge, attitude towards CAM, interest in attaining CAM knowledge, perceived effectiveness of CAM, perceived adverse effects of CAM, self-practice of CAM, and whether would they refer CAM to others. A total of 576 students responded and the data gathered allowed for the following: (1) an overview of the study groups, (2) respondents’ general perception and knowledge regarding CAM, and (3) a comparison of respondents’ CAM knowledge, general perception, and usage by area of study. Data were analyzed using STATA (v.16) and descriptive statistics, Pearson’s chi-square test, and Mann-Whitney U test were performed.

RESULTS: A total of 329 medical students and 247 non-medical students participated in the study. The mean age of the participants was 21.57 ± 1.8 years and 56.2% of them were male. The most known CAM among medical (M) students was homeopathy (44.6%) and among non-medical (NM) students were herbal medicine (45.7%). Non-medical students had significantly better knowledge about nine out of twelve CAM modalities included in the study, and no significant differences were present for the rest of the modalities. Medical (81.1%) and non-medical students (86.2%) perceived traditional Chinese medicine and homeopathy to be the most effective respectively. “Incorporating CAM with conventional medicine would result in increased patient satisfaction” showed the most statistically significant (p = 0.0002) difference among both groups. Yoga was the most often practiced modality among medical students and homeopathy among non-medical students.

CONCLUSION: Medical students have a lacking of knowledge and a positive attitude towards CAM, despite its very common practice among the people of Bangladesh. Therefore, emphasis should be put on the inclusion of CAM modules in medical training.

PMID:36578028 | DOI:10.1186/s12906-022-03797-6

BMC Med Educ. 2022 Dec 28;22(1):898. doi: 10.1186/s12909-022-03985-5.

ABSTRACT

BACKGROUND: This study aimed to evaluate the acceptance of Peer Physical Examination (PPE) in middle Eastern society with its associate factors, and PPE acceptance during Covid-19 pandemic. The acceptance of PPE is considered high in multiple studies carried out in the west, but there were nearly no studies investigating the acceptance of PPE in the middle east or low-income countries.

METHODS: A questionnaire was shared through social media with students with focus on clinical-year students. A total number of 657 medical students were collected with a 74.5% response rate. The questionnaire gathered demographic information and recorded previous experience of PPE. A 5-point-likert scale was used to assess acceptance of PPE, factors affecting it, and the influence of COVID-19 pandemic. It also considered body’s areas students would accept to be examined. Associations between participants’ demographic and other details were tested using independent-samples T Test and other tests, and a p-value of < 0.05 was considered significant.

RESULTS: Eighty percent of medical students accepted PPE, while 3% did not, and 17% were neutral. Males had statistically significantly higher acceptance rates of PPE (M = 3.94 out of 5). Also, females had lower acceptance of being examined by other gender than males but did not mind examining other gender. Furthermore, the groin area (thigh) was the most rejected area for examination (20% only accept it), followed by the breast (23%). There was no statistically significant difference between different Universities groups or between different academic performance groups, finally there was statistically significant effect of religion and society on acceptance of PPE and religion has affected females more than males (p- value = 0.002). 70.8% of students supported PPE during the COVID-19 pandemic, while 6.8% did not, and 22.4% were neutral. There was not a significant difference in acceptance and supporting of PPE during the COVID-19 pandemic between males and females.

CONCLUSIONS: With an 80% acceptance rate, PPE represents an effective alternative to the absent life models in Syrian universities. The application of PPE is less likely to go without difficulties, but authors suggest the presence of a supervisor and single-gender groups with friends paired together if possible.

PMID:36578027 | DOI:10.1186/s12909-022-03985-5

BMC Pregnancy Childbirth. 2022 Dec 28;22(1):973. doi: 10.1186/s12884-022-05332-4.

ABSTRACT

BACKGROUND: The impact of labor epidural analgesia (LEA) on breastfeeding remains controversial. The aim of this study was to assess the relationship between LEA use and exclusive breastfeeding (EBF) up to 6 months.

METHODS: This was a cross-sectional survey on healthy mothers who had vaginal delivery with infants aged 7-12 months from seven maternal health WeChat groups in Jiaxing, China. Data including EBF status up to 6 months, maternal sociodemographic characteristics, LEA use in labor, breastfeeding supports during hospitalization and reasons for stopping EBF were collected using online self-administered questionnaires in October 2021. A multivariable logistic regression model was used to determine the potential association of LEA use with EBF up to 6 months by the adjusted odds ratio (AOR) and 95% confidence interval (CI).

RESULTS: Of a total of 537 surveyed mothers, 408 (76.0%) delivered with LEA and 398 (74.1%) exclusively breastfed their infants until 6 months. All mothers delivered in the hospitals with active breastfeeding policies. There was no statistical difference in the rate of EBF up to 6 months between mothers with and without LEA (73.8% versus 75.2%, P = 0.748). Multivariable logistic regression analysis indicated that only increased maternal age (AOR = 0.906, 95% CI 0.854-0.961, P = 0.001) and perceived insufficient breast milk (AOR = 0.129, 95% CI 0.082-0.204, P < 0.001) were associated with lower odds of EBF up to 6 months. The top three reasons for non-EBF were no or insufficient breast milk (41.7%), inability to breastfeed infants after return to work (27.3%), and maternal related factors (24.4%).

CONCLUSIONS: LEA does not affect EBF up to 6 months. Other factors such as health education and breastfeeding-friendly hospital strategies may be much more important to breastfeeding outcomes compared to LEA use.

PMID:36578025 | DOI:10.1186/s12884-022-05332-4

Reprod Health. 2022 Dec 28;19(1):232. doi: 10.1186/s12978-022-01534-3.

ABSTRACT

BACKGROUND: Utilization of contraceptives remains low in several countries in sub-Saharan Africa despite evidence of its benefits. Several factors are associated with contraceptive use. However, little is known about the association between women’s decision-making capacity and the utilization of contraceptives in Mali. This study sought to determine the effect of women’s household decision-making power on contraceptive use in Mali.

METHODS: This study involved a cross-sectional analysis of data from the 2018 Mali Demographic and Health Survey. A total of 7893 married women were included in the final analysis. A binary logistic regression analysis was conducted with statistical significance set at p < 0.05.

RESULTS: Contraceptive use among married women in Mali was 17.1%. The odds of using contraceptives were higher among women with joint decision-making with their husbands on how to spend respondent’s earnings [aOR = 1.79; 95% CI = 1.12, 2.85], joint decision-making with their husbands on what to do with their husband’s earnings [aOR = 1.43; 95% CI = 1.12, 1.83], and joint decision-making with husband on large household purchases [aOR = 1.32; 95% CI = 1.10, 1.59]. Deciding alone on a visit to family or relatives was associated with lower odds of contraceptive use [AOR = 0.72; 95% CI = 0.58, 0.89].

CONCLUSION: The study has revealed that joint household decision-making is positively associated with contraceptive use. Therefore, to achieve Sustainable Development Goal 3, the ministry for the advancement of women, children and families and related stakeholders must unearth strategies to empower women in joint decision-making and encourage men’s involvement in contraceptive decision-making.

PMID:36578012 | DOI:10.1186/s12978-022-01534-3

Health Res Policy Syst. 2022 Dec 28;20(1):140. doi: 10.1186/s12961-022-00945-9.

ABSTRACT

BACKGROUND: This paper seeks to assess the sustainability of the reformed maternity insurance system and the extent to which China’s current maternity insurance system can support different levels of fertility incentives in the future. Our findings will serve as a reference for countries in a similar demographic predicament and those about to face it.

METHODS: This study used a combination of qualitative and quantitative methods. In the qualitative assessment, we used a grounded theory model to generalize the factors influencing the sustainability of maternity insurance funds. For the quantitative analysis, we used a novel and comprehensive system dynamics model to visualize the status of the combined operation of maternity and health insurance. Data are mainly derived from the historical data of the Statistical Yearbook of Jiangsu Province and the National Bureau of Statistics of China.

RESULTS: In the short term, fertility incentive payments can be set to motivate people to have children. It is therefore recommended that when the scope of the fertility incentive policy is limited to two children, and an average amount above RMB 10 000 could be set, it would be prudent to set the amount at a level not exceeding RMB 10 000 when the scope of the fertility incentive policy is for all newborns. In the long term, a system of incentives for childbirth should be built from education policy, house price regulation, tax relief and childcare services.

CONCLUSION: Our research not only highlights the significance of improving the resilience of maternity insurance by combining maternity insurance and health insurance funds, but also suggests a way to economically incentivize beneficiaries to have children so as to mitigate the decline in China’s birth rate and cope with the crisis of an ageing population.

PMID:36578006 | DOI:10.1186/s12961-022-00945-9

BMC Oral Health. 2022 Dec 28;22(1):648. doi: 10.1186/s12903-022-02672-7.

ABSTRACT

BACKGROUND: Adhesive tooth-colored restorations are strongly dependent on the substrate surface cleanliness to allow intimate contact between resin cement and dentin surface, so several methods were adopted for the total cleaning of temporary cement residues. This study aimed to assess the effect of mechanical and chemo-mechanical cleaning methods of temporary cement on the immediate shear bond strength of self-adhesive resin cement to dentin surface.

METHODS: Forty freshly extracted lower first premolars were cut to expose a flat dentin surface. Discs of temporary crown composite resin material were constructed and cemented to the flat dentin surface using resin-based and non-eugenol temporary cement then stored at room temperature in distilled water. Dividing of samples into two groups according to the method of temporary cement cleaning. Group I (n = 20) mechanical cleaning using the rotary instrument, and group II (n = 20) chemo-mechanical cleaning using chlorhexidine-containing scrub. CAD/CAM reinforced Composite discs were bonded to the dentin surface using self-adhesive composite resin cement, then measurement of shear bond strength was done using a universal testing machine. Further analysis of failure mode after debonding was performed by Scanning electron microscope.

RESULTS: No statistically significant difference was found between the mean shear bond strength of the two cleaning methods (P-value = 0.636). Regardless of the cleaning method, the group cemented with resin-based temporary cement showed statistically significantly higher mean shear bond strength than non-eugenol temporary cement (P-value = 0.048).

CONCLUSION: Both cleaning methods (mechanical and chemo-mechanical) applied in this study were effective in cleaning temporary cement remnants from the dentin substrate surface with statistically significant differences between results of shear bond strength with significantly higher values recorded with resin-based temporary cement.

PMID:36578003 | DOI:10.1186/s12903-022-02672-7

Int J Behav Nutr Phys Act. 2022 Dec 28;19(1):159. doi: 10.1186/s12966-022-01401-1.

ABSTRACT

BACKGROUND: Physical inactivity is a risk factor for numerous adverse health conditions and outcomes, including all-cause mortality. Aging rural women are at particular risk for physical inactivity based on environmental, sociocultural, and psychosocial factors. This study reports on changes in physical activity and associated factors from a multicomponent community-engaged intervention trial.

METHODS: Strong Hearts, Healthy Communities 2.0 (SHHC-2.0) was a 24-week cluster (community) randomized controlled trial building on the results from the previous trial of SHHC-1.0. Rural women (n = 182) aged 40 and over living in 11 rural communities in upstate New York were recruited. The intervention consisted of twice-weekly experiential classes focused on exercise, nutrition, and civic engagement. Physical activity outcomes included accelerometry and self-report as well as related psychosocial measures at midpoint (12 weeks) and post-intervention (24 weeks). Data were analyzed using multilevel linear regression models with the community as the random effect.

RESULTS: Compared to participants from the control communities, participants in the intervention communities showed a significant increase in objectively measured moderate to vigorous intensity physical activity: at 12 weeks (increase of 8.1 min per day, P < 0.001) and at 24 weeks (increase of 6.4 min per day; P = 0.011). Self-reported total MET minutes per week also increased: at 12 weeks (increase of 725.8, P = 0.003) and 24 weeks (increase of 955.9, P = 0.002). Several of the psychosocial variables also showed significant positive changes.

CONCLUSIONS: The SHHC-2.0 intervention successfully increased physical activity level and related outcome measures. Modifications made based upon in-depth process evaluation from SHHC-1.0 appear to have been effective in increasing physical activity in this at-risk population.

TRIAL REGISTRATION: Clinicaltrials.gov: NCT03059472. Registered 23 February 2017.

PMID:36578002 | DOI:10.1186/s12966-022-01401-1