Tag: statistics

AIDS Behav. 2022 Aug 6. doi: 10.1007/s10461-022-03792-5. Online ahead of print.

ABSTRACT

Peer-driven interventions can be effective in reducing HIV injection risk behaviors among people who inject drugs (PWID). We employed a causal mediation framework to examine the mediating role of recall of intervention knowledge in the relationship between a peer-driven intervention and subsequent self-reported HIV injection-related risk behavior among PWID in the HIV Prevention Trials Network (HPTN) 037 study. For each intervention network, the index participant received training at baseline to become a peer educator, while non-index participants and all participants in the control networks received only HIV testing and counseling; recall of intervention knowledge was measured at the 6-month visit for each participant, and each participant was followed to ascertain HIV injection-related risk behaviors at the 12-month visit. We used inverse probability weighting to fit marginal structural models to estimate the total effect (TE) and controlled direct effect (CDE) of the intervention on the outcome. The proportion eliminated (PE) by intervening to remove mediation by the recall of intervention knowledge was computed. There were 385 participants (47% in intervention networks) included in the analysis. The TE and CDE risk ratios for the intervention were 0.47 [95% confidence interval (CI): 0.28, 0.78] and 0.73 (95% CI: 0.26, 2.06) and the PE was 49%. Compared to participants in the control networks, the peer-driven intervention reduced the risk of HIV injection-related risk behavior by 53%. The mediating role of recall of intervention knowledge accounted for less than 50% of the total effect of the intervention, suggesting that other potential causal pathways between the intervention and the outcome, such as motivation and skill, self-efficacy, social norms and behavior modeling, should be considered in future studies.

PMID:35932359 | DOI:10.1007/s10461-022-03792-5

Environ Sci Pollut Res Int. 2022 Aug 6. doi: 10.1007/s11356-022-22352-x. Online ahead of print.

ABSTRACT

The association between co-exposure to multiple metals and renal function is poorly understood. We aimed to evaluate the individual and joint effects of metal exposure on renal function in this study. We performed a cross-sectional study including 5828 participants in Guangxi, China, in 2019. Urine concentrations of 17 metals were detected by inductively coupled plasma mass spectrometry (ICP-MS). Logistic regression model and restricted cubic spline (RCS) were applied to investigate the association of individual metal exposure with renal dysfunction. Weighted quantile sum (WQS) regression and Bayesian kernel machine regression (BKMR) were used to assess the co-exposure effects of the metals. Participants with the highest quartile of urinary Cu were at 1.84-fold (95% confidence interval (CI): 1.20-2.87) increased risk of renal dysfunction compared with the lowest quartile. The highest quartiles of urinary Sr, Cs, V, Ba, and Se were associated with 0.27-fold (95% CI: 0.17-0.43), 0.33 (95% CI: 0.19-0.53), 0.41 (95% CI: 0.25-0.65), 0.58 (95% CI: 0.36-0.90), and 0.33 (95% CI: 0.19-0.56) decreased risk of renal dysfunction compared with their lowest quartile, respectively. Furthermore, urinary Ba and Cu were non-linearly correlated with renal dysfunction. The WQS analysis showed that mixed metal exposure was inversely associated with renal dysfunction (OR = 0.47, 95% CI: 0.35-0.62), and Sr accounted for the largest weight (52.2%), followed by Cs (32.3%) in the association. Moreover, we observed a potential interaction between Cu, Cs, and Ba for renal dysfunction in BKMR model. Exposure to Se, Sr, Cs, V, and Ba is associated with decreased risk of renal dysfunction, whereas an increased risk is associated with Cu exposure. Co-exposure to these metals is negatively associated with renal dysfunction, and Sr and Cs are the main contributors to the associations.

PMID:35932350 | DOI:10.1007/s11356-022-22352-x

Eur Arch Otorhinolaryngol. 2022 Aug 6. doi: 10.1007/s00405-022-07585-3. Online ahead of print.

ABSTRACT

PURPOSE: To evaluate association between clinical and pathological findings and repeated recurrence in sinonasal inverted papilloma.

METHODS: Retrospective cohort study conducted at a tertiary care teaching hospital included all patients operated for inverted papilloma from January 2010 to December 2019. Patients were categorized as primary and recurrent cases. Based on disease status at follow-up, they were subcategorized into ‘primary with no recurrence’ (PnR), ‘primary with recurrence’ (PwR), ‘recurrent with no further recurrence’ (RnR), and ‘recurrent with further recurrence’ (RwR) groups. Data including demography, clinical, endoscopic and pathological findings were collected and analyzed.

RESULTS: Increased incidence of pale appearance of lesion in RnR group (p = 0.017), polypoidal appearance in primary group (p = 0.002) and fibrous appearance in the recurrent group (p = 0.002) were statistically significant. Predominant epithelium was combined respiratory and squamous epithelium in primary and recurrent groups and also in RnR group (p = 0.019), while it was squamous (p = 0.024) in RwR group. Epithelial hyperplasia was more common in primary and RnR groups. Oncocytic change, cystic dilatation, microabscess and squamous metaplasia were seen more in recurrent and RnR groups. Cytoplasmic glycogenation was more in recurrent and RwR groups. Stroma was predominantly edematous in all the groups.

CONCLUSIONS: Patients with recurrence are younger and present earlier than those with primary disease. Fleshy appearance and pink/red colour of tumour, lining epithelium being squamous and cytoplasmic glycogenation could be considered as features predicting recurrence. Negative predictors of recurrence of IP include pale appearance of tumour, combined respiratory and squamous epithelium lining and squamous metaplasia.

PMID:35932314 | DOI:10.1007/s00405-022-07585-3

Soc Psychiatry Psychiatr Epidemiol. 2022 Aug 6. doi: 10.1007/s00127-022-02323-w. Online ahead of print.

ABSTRACT

PURPOSE: This study aimed to explore the prevalence and distribution of mental disorders in the elderly population 5 years after the Lushan earthquake in Ya’an, China.

METHODS: A multi-stage, group-matching random sampling method was adopted with 2579 elderly participants (≥ 60 years old) who were interviewed from January to May 2019. Preliminary screening was conducted using the scale by trained psychiatric nurses, followed by a diagnostic interview during the second stage using Chinese Version of the 5th edition of the Diagnostic and Statistical Manual of Mental Disorder by trained psychiatrists.

RESULTS: A total of 2561 participants were included in this study with complete data. The weighted lifetime prevalence of all mental disorders in the elderly was 16.2% (95% CI 15.3-17.1), and the weighted 12-month prevalence was 15.2% (95% CI 13.4-17.0). Depressive disorders, anxiety disorders, substance-related and addictive disorders were the most common mental disorders. The 12-month prevalence of all mental disorders were significantly higher in the elderly living alone, with chronic somatic disease, and being poor (P < 0.05). The 12-month prevalence of posttraumatic stress disorder (PTSD) was significantly higher in the elderly in extremely severely earthquake-affected areas (P < 0.001).

CONCLUSION: The results of this study show that mental health status of the elderly in Ya’an area differ by socio-economic development, geographical location, and natural disasters. The social and economic development characteristics, the impact of major natural disasters (e.g., earthquakes), and population characteristics should be combined to formulate strategies and interventions to promote the mental health of the elderly.

PMID:35932308 | DOI:10.1007/s00127-022-02323-w

Cancer. 2022 Aug 6. doi: 10.1002/cncr.34405. Online ahead of print.

ABSTRACT

BACKGROUND: CD5-positive diffuse large B-cell lymphoma (DLBCL) is a clinically rare subtype of DLBCL with aggressive clinical manifestations and a poor prognosis. It has been demonstrated that the prognostic nutritional index (PNI), an indicator of nutritional status and systemic inflammation, is a significant prognostic factor for several types of lymphoma. The objective of this multicenter retrospective study was to explore the prognostic value of the PNI in patients with CD5-positive DLBCL.

METHODS: In total, 207 patients with CD5-positive DLBCL were recruited from 11 centers of the Huaihai Lymphoma Working Group. Maximally selected rank statistics analysis was used to identify optimal cutoff points for the PNI. A Cox proportional hazards model was used for univariable and multivariable analyses. Kaplan-Meier curves were used to calculate survival rates and draw survival curves, and the log-rank test was used to compare differences between groups.

RESULTS: The median age at diagnosis was 61 years, and the 5-year overall survival rate was 47.5%. According to the maximally selected rank statistics analysis, a score of 49.7 was the optimal cutoff point for the PNI. Subgroup analysis showed that the PNI could re-stratify patients in BCL-2-negative, MYC-negative, high-intermediate-risk and high-risk International Prognostic Index, BCL-6-positive and BCL-6-negative, high Ki-67 score (≥0.9), Ann Arbor stage III/IV, Eastern Cooperative Oncology Group performance status ≥2, and germinal center B subgroups. Multivariable analysis revealed that PNI, age, Eastern Cooperative Oncology Group performance status, albumin level, and red blood cell count were independent prognostic factors for CD5-positive DLBCL.

CONCLUSIONS: The PNI was a significant prognostic indicator for CD5-positive DLBCL and was able to re-stratify the prognosis for clinicopathologic subgroups of patients with CD5-positive DLBCL.

PMID:35932292 | DOI:10.1002/cncr.34405

J Am Geriatr Soc. 2022 Aug 6. doi: 10.1111/jgs.17964. Online ahead of print.

ABSTRACT

BACKGROUND: Falls are common in older adults and can lead to severe injuries. The Strategies to Reduce Injuries and Develop Confidence in Elders (STRIDE) trial cluster-randomized 86 primary care practices across 10 health systems to a multifactorial intervention to prevent fall injuries, delivered by registered nurses trained as falls care managers, or enhanced usual care. STRIDE enrolled 5451 community-dwelling older adults age ≥70 at increased fall injury risk.

METHODS: We assessed fall-related outcomes via telephone interviews of participants (or proxies) every 4 months. At baseline, 12 and 24 months, we assessed health-related quality of life (HRQOL) using the EQ-5D-5L and EQ-VAS. We used Poisson models to assess intervention effects on falls, fall-related fractures, fall injuries leading to hospital admission, and fall injuries leading to medical attention. We used hierarchical longitudinal linear models to assess HRQOL.

RESULTS: For recurrent event models, intervention versus control incidence rate ratios were 0.97 (95% confidence interval [CI], 0.93-1.00; p = 0.048) for falls, 0.93 (95% CI, 0.80-1.08; p = 0.337) for self-reported fractures, 0.89 (95% CI, 0.73-1.07; p = 0.205) for adjudicated fractures, 0.91 (95% CI, 0.77-1.07; p = 0.263) for falls leading to hospital admission, and 0.97 (95% CI, 0.89-1.06; p = 0.477) for falls leading to medical attention. Similar effect sizes (non-significant) were obtained for dichotomous outcomes (e.g., participants with ≥1 events). The difference in least square mean change over time in EQ-5D-5L (intervention minus control) was 0.009 (95% CI, -0.002 to 0.019; p = 0.106) at 12 months and 0.005 (95% CI, -0.006 to 0.015; p = 0.384) at 24 months.

CONCLUSIONS: Across a standard set of outcomes typically reported in fall prevention studies, we observed modest improvements, one of which was statistically significant. Future work should focus on patient-, practice-, and organization-level operational strategies to increase the real-world effectiveness of interventions, and improving the ability to detect small but potentially meaningful clinical effects.

CLINICALTRIALS: gov identifier: NCT02475850.

PMID:35932279 | DOI:10.1111/jgs.17964

J Neurosurg. 2022 Aug 5:1-11. doi: 10.3171/2022.6.JNS2297. Online ahead of print.

ABSTRACT

OBJECTIVE: Broca’s aphasia is a syndrome of impaired fluency with retained comprehension. The authors used an unbiased algorithm to examine which neuroanatomical areas are most likely to result in Broca’s aphasia following surgical lesions.

METHODS: Patients were prospectively evaluated with standardized language batteries before and after surgery. Broca’s area was defined anatomically as the pars opercularis and triangularis of the inferior frontal gyrus. Broca’s aphasia was defined by the Western Aphasia Battery language assessment. Resections were outlined from MRI scans to construct 3D volumes of interest. These were aligned using a nonlinear transformation to Montreal Neurological Institute brain space. A voxel-based lesion-symptom mapping (VLSM) algorithm was used to test for areas statistically associated with Broca’s aphasia when incorporated into a resection, as well as areas associated with deficits in fluency independent of Western Aphasia Battery classification. Postoperative MRI scans were reviewed in blinded fashion to estimate the percentage resection of Broca’s area compared to areas identified using the VLSM algorithm.

RESULTS: A total of 289 patients had early language evaluations, of whom 19 had postoperative Broca’s aphasia. VLSM analysis revealed an area that was highly correlated (p < 0.001) with Broca’s aphasia, spanning ventral sensorimotor cortex and supramarginal gyri, as well as extending into subcortical white matter tracts. Reduced fluency scores were significantly associated with an overlapping region of interest. The fluency score was negatively correlated with fraction of resected precentral, postcentral, and supramarginal components of the VLSM area.

CONCLUSIONS: Broca’s aphasia does not typically arise from neurosurgical resections in Broca’s area. When Broca’s aphasia does occur after surgery, it is typically in the early postoperative period, improves by 1 month, and is associated with resections of ventral sensorimotor cortex and supramarginal gyri.

PMID:35932264 | DOI:10.3171/2022.6.JNS2297

Health Econ. 2022 Aug 6. doi: 10.1002/hec.4561. Online ahead of print.

ABSTRACT

Better integration is a priority for most international health systems. However, multiple interventions are often implemented simultaneously, making evaluation difficult and providing limited evidence for policy makers about specific interventions. We evaluate a common integrated care intervention, multi-disciplinary group (MDG) meetings for discussion of high-risk patients, introduced in one socio-economically deprived area in the UK in spring 2015. Using data from multiple waves of the national GP Patient Survey and Hospital Episode Statistics, we estimate its effects on primary and secondary care utilization and costs, health status and patient experience. We use triple differences, exploiting the targeting at people aged 65 years and over, parsing effects from other population-level interventions implemented simultaneously. The intervention reduced the probability of visiting a primary care nurse by three percentage points and decreased length of stay by 1 day following emergency care admission. However, since planned care use increased, overall costs were unaffected. MDG meetings are presumably fulfilling public health objectives by decreasing length of stay and detecting previously unmet needs. However, the effect of MDGs on health system cost is uncertain and health remains unchanged. Evaluations of specific integrated care interventions may be more useful to public decision makers facing budget constraints.

PMID:35932257 | DOI:10.1002/hec.4561

J Paediatr Child Health. 2022 Aug 6. doi: 10.1111/jpc.16145. Online ahead of print.

ABSTRACT

AIM: Post-circumcision topical steroids may reduce the number of patients with balanitis xerotica obliterans (BXO) who require subsequent meatal dilatation. However, their use has only been investigated in the presence of an abnormal urethral meatus. The aim of this study is to determine if post-operative topical steroids reduce the need for subsequent meatal dilatation in patients with histologically proven BXO independent of the appearance of the urethral meatus. To determine if post-operative topical steroids reduce the need for subsequent meatal procedures in patients with histologically proven BXO. To determine if the appearance of the meatus at circumcision affects the need for subsequent meatal procedure.

METHODS: We performed a retrospective review of all paediatric patients with histologically confirmed BXO post circumcision. We excluded all those with ‘chronic inflammation’ or ‘early BXO’. Patients were divided into groups based on whether post-operative topical steroids were prescribed. The appearance of the urethral meatus at circumcision was recorded. Primary outcome was progression to subsequent meatal dilatation. Statistical significance was calculated using Fisher’s exact test. A P value < 0.05 was considered significant.

RESULTS: One hundred and seventeen patients with histologically confirmed BXO were identified between October 2012 and December 2017. Fifty-nine patients were prescribed post-operative topical steroids (50%). Nine patients required subsequent meatal dilatation procedure (8%) and only one of these had been prescribed post-operative topical steroids (P = 0.0165). Abnormal meatus was noted in 24 (21%) patients. Three patients in this group required subsequent meatal dilatation compared with 6 in the group with a normal meatal appearance (P = 0.385).

CONCLUSIONS: Post-operative topical steroids can reduce the need for subsequent meatal dilatation in boys with BXO. The appearance of the urethral meatus at circumcision does not predict the need for subsequent meatal dilatation.

PMID:35932250 | DOI:10.1111/jpc.16145

J Sch Health. 2022 Aug 6. doi: 10.1111/josh.13216. Online ahead of print.

ABSTRACT

BACKGROUND: Although positive youth development (PYD) programs have demonstrated effectiveness in improving adolescent reproductive health outcomes, there is a lack of evidence on effective school-based interventions designed especially for high school settings. This study examined the efficacy of Peer Group Connection (PGC-HS), a school-based PYD program, in improving sexual health outcomes for high school participants.

METHODS: A total of 1523 ninth-grade students at 18 schools were randomly assigned to be offered PGC-HS or a classes-as-usual control condition during 2016 to 2017 and 2017 to 2018 school years. Impacts were assessed on three confirmatory and 6 exploratory outcomes via self-reported participant questionnaire data collected at the beginning of 10th grade.

RESULTS: Although the offer of PGC-HS had no statistically detectable effect on confirmatory behavioral outcomes (sexual initiation, frequency of sex, and number of sexual partners) at 10th grade follow-up, causal impact estimates indicate that PGC-HS participants were less likely than control participants to ever have had vaginal sex. PGC-HS participants also scored higher on decision-making skills and perceived connection to peer connectedness.

CONCLUSIONS: Results suggest that by building social and emotional skills and helping students form supportive peer relationships, PGC-HS may encourage students to make healthier choices and avoid risky behaviors during a critical period in high school, thus, reducing the risk of pregnancy.

PMID:35932196 | DOI:10.1111/josh.13216