Category: Statistics

Occup Environ Med. 2024 Apr 29:oemed-2024-109428. doi: 10.1136/oemed-2024-109428. Online ahead of print.

ABSTRACT

OBJECTIVES: Hospital attendance related to fire, flame or smoke exposure is commonly associated with work. The aim of this study was to examine time trends and risk factors for work-related fire/flame/smoke injuries in Victoria, Australia.

METHODS: This study was based on emergency department (ED) presentation records from the Victorian Emergency Minimum Dataset, 2003-2021. Cases were people aged 15-74 years with injury-related ED presentations, if cause of injury was recorded as fire/flame/smoke, based on coded data and/or narratives. Work-related rates were calculated per employed persons; non-work rates were calculated per population. Work-related and non-work-related cases were compared using logistic regression modelling.

RESULTS: There were 11 838 ED presentations related to fire/flame/smoke: 1864 (15.7%) were work-related. Non-work-related rates were 12.3 ED presentations per 100 000 population, and work-related rates were 3.43 per 100 000 employed persons annually. Over the study period, work-related rates decreased annually by 2.0% (p<0.0001), while non-work rates increased by 1.1% (p<0.0001). Work-related cases (vs non-work) were associated with summer (vs winter), but the association with extreme bushfire periods (Victorian ‘Black Saturday’ and ‘Black Summer’) was not statistically significant. Work-related cases were less severe than non-work-related cases, evidenced by triage status and subsequent admission.

CONCLUSIONS: Rates of occupational fire/flame/smoke-related injury presentations decreased over the past two decades in Victoria, while non-work-related rates increased. This could reflect improved safety in the workplace. Hospital data, however, cannot be used to distinguish occupation or industry therefore, employment data linkage studies are recommended to further inform workplace preventive measures.

PMID:38684332 | DOI:10.1136/oemed-2024-109428

Stat Med. 2024 Apr 29. doi: 10.1002/sim.10087. Online ahead of print.

ABSTRACT

Longitudinal clinical trials for which recurrent events endpoints are of interest are commonly subject to missing event data. Primary analyses in such trials are often performed assuming events are missing at random, and sensitivity analyses are necessary to assess robustness of primary analysis conclusions to missing data assumptions. Control-based imputation is an attractive approach in superiority trials for imposing conservative assumptions on how data may be missing not at random. A popular approach to implementing control-based assumptions for recurrent events is multiple imputation (MI), but Rubin’s variance estimator is often biased for the true sampling variability of the point estimator in the control-based setting. We propose distributional imputation (DI) with corresponding wild bootstrap variance estimation procedure for control-based sensitivity analyses of recurrent events. We apply control-based DI to a type I diabetes trial. In the application and simulation studies, DI produced more reasonable standard error estimates than MI with Rubin’s combining rules in control-based sensitivity analyses of recurrent events.

PMID:38684331 | DOI:10.1002/sim.10087

AJNR Am J Neuroradiol. 2024 Apr 29:ajnr.A8322. doi: 10.3174/ajnr.A8322. Online ahead of print.

ABSTRACT

BACKGROUND AND PURPOSE: The Brain Tumor Reporting and Data System (BT-RADS) is a structured radiology reporting algorithm that was introduced to provide uniformity in post-treatment primary brain tumor follow-up and reporting, but its interrater reliability (IRR) assessment has not been widely studied. Our goal is to evaluate the IRR among neuroradiologists and radiology residents in the use of BT-RADS.

MATERIALS AND METHODS: This retrospective study reviewed 103 consecutive MR studies in 98 adult patients previously diagnosed with and treated for primary brain tumor (January 2019 to February 2019). Six readers with varied experience (4 neuroradiologists and 2 radiology residents) independently evaluated each case and assigned a BT-RADS score. Readers were blinded to the original score reports and the reports from other readers. Cases in which at least one neuroradiologist scored differently were subjected to consensus scoring. After the study, a post-hoc reference score was also assigned by 2 readers using future imaging and clinical information previously unavailable to readers. The interrater reliabilities were assessed using Gwet’s AC2 index with ordinal weights and percent agreement.

RESULTS: Of the 98 patients evaluated (median age, 53 years; interquartile range, 41-66 years), 53% were males. The most common tumor type was astrocytoma (77%) of which 56% were grade 4 glioblastoma. Gwet’s index for interrater reliability among all six readers was 0.83 (95% CI: 0.78, 0.87). The Gwet’s index for the neuroradiologists’ group (0.84 [95% CI: 0.79, 0.89]) was not statistically different from that for the residents’ group (0.79 [95% CI: 0.72, 0.86]) (χ² = 0.85; p = 0.36). All four neuroradiologists agreed on the same BT-RADS score in 57 of the 103 studies, three neuroradiologists agreed in 21 of the 103 studies, and two neuroradiologists agreed in 21 of the 103 studies. Percent agreement between neuroradiologist blinded scores and post-hoc reference scores ranged from 41%-52%.

CONCLUSIONS: A very good interrater agreement was found when tumor reports were interpreted by independent blinded readers using BT-RADS criteria. Further study is needed to determine if this high overall agreement can translate into greater consistency in clinical care.

ABBREVIATIONS: BI-RADS = Breast Imaging Reporting and Data System; BT-RADS = Brain Tumor Reporting and Data System; IQR = interquartile range; IRR = interrater reliability; NI-RADS = Neck Imaging Reporting and Data System.

PMID:38684320 | DOI:10.3174/ajnr.A8322

AJNR Am J Neuroradiol. 2024 Apr 29:ajnr.A8320. doi: 10.3174/ajnr.A8320. Online ahead of print.

ABSTRACT

BACKGROUND AND PURPOSE: Ischemic stroke disrupts functional connectivity within the brain’s resting-state networks (RSNs), impacting recovery. This study evaluates the effects of NEH (Norepinephrine and Hydralazine), a cerebral perfusion augmentation therapy, on RSN integrity in a hyper-acute canine stroke model.

MATERIALS AND METHODS: Fifteen adult purpose-bred mongrel canines, divided into treatment and control (natural history) groups, underwent endovascular induction of acute middle cerebral artery occlusion (MCAO). Post-occlusion, the treatment group received intra-arterial Norepinephrine (0.1-1.52 μg/kg/min, adjusted for 25-45 mmHg above baseline mean arterial pressure) and Hydralazine (20mg). Resting-state fMRI data were acquired with a 3.0 T scanner using a BOLD-sensitive EPI sequence (TR/TE=1400 ms/20ms, 2.5 mm slices, 300 temporal positions). Preprocessing included motion correction, spatial smoothing (2.5 mm FWHM), and high-pass filtering (0.01 Hz cutoff). Functional connectivity within RSNs were analyzed through group-level independent component analysis (ICA) and weighted whole-brain ROI-to-ROI connectome, pre-and post-MCAO.

RESULTS: NEH therapy significantly maintained connectivity post-MCAO in the Higher-order Visual and Parietal RSNs, as evidenced by thresholded statistical mapping (TFCE p-corr > 0.95). However, this preservation was network-dependent, with no significant changes in the Primary Visual and Sensorimotor networks.

CONCLUSIONS: NEH demonstrates potential as a proof-of-concept therapy for maintaining RSN functional connectivity following ischemic stroke, emphasizing the therapeutic promise of perfusion augmentation. These insights reinforce the role of functional connectivity as a measurable endpoint for stroke intervention efficacy, suggesting clinical translatability for patients with insufficient collateral circulation.

ABBREVIATIONS: NEH＝ Norepinephrine and Hydralazine; RSN＝ Resting-State Network; ICA = Independent Component Analysis; rsfMRI = resting-state Functional Magnetic Resonance Imaging; MCAO = Middle Cerebral Artery Occlusion; TFCE = Threshold-Free Cluster Enhancement.

PMID:38684318 | DOI:10.3174/ajnr.A8320

BMJ. 2024 Apr 29;385:q971. doi: 10.1136/bmj.q971.

NO ABSTRACT

PMID:38684290 | DOI:10.1136/bmj.q971

CMAJ. 2024 Apr 28;196(16):E547-E557. doi: 10.1503/cmaj.231419.

ABSTRACT

BACKGROUND: People with opioid use disorder (OUD) are at risk of premature death and can benefit from palliative care. We sought to compare palliative care provision for decedents with and without OUD.

METHODS: We conducted a cohort study using health administrative databases in Ontario, Canada, to identify people who died between July 1, 2015, and Dec. 31, 2021. The exposure was OUD, defined as having emergency department visits, hospital admissions, or pharmacologic treatments suggestive of OUD within 3 years of death. Our primary outcome was receipt of 1 or more palliative care services during the last 90 days before death. Secondary outcomes included setting, initiation, and intensity of palliative care. We conducted a secondary analysis excluding sudden deaths (e.g., opioid toxicity, injury).

RESULTS: Of 679 840 decedents, 11 200 (1.6%) had OUD. Compared with people without OUD, those with OUD died at a younger age and were more likely to live in neighbourhoods with high marginalization indices. We found people with OUD were less likely to receive palliative care at the end of their lives (adjusted relative risk [RR] 0.84, 95% confidence interval [CI] 0.82-0.86), but this difference did not exist after excluding people who died suddenly (adjusted RR 0.99, 95% CI 0.96-1.01). People with OUD were less likely to receive palliative care in clinics and their homes regardless of cause of death.

INTERPRETATION: Opioid use disorder can be a chronic, life-limiting illness, and people with OUD are less likely to receive palliative care in communities during the 90 days before death. Health care providers should receive training in palliative care and addiction medicine to support people with OUD.

PMID:38684285 | DOI:10.1503/cmaj.231419

CMAJ. 2024 Apr 28;196(16):E563-E565. doi: 10.1503/cmaj.231272.

NO ABSTRACT

PMID:38684284 | DOI:10.1503/cmaj.231272

BMJ Open. 2024 Apr 29;14(4):e066605. doi: 10.1136/bmjopen-2022-066605.

ABSTRACT

OBJECTIVE: To assess the prevalence of modern contraceptive discontinuation and associated factors among married reproductive age (15-49 years) group women.

STUDY DESIGN, SETTING AND PARTICIPANTS: A community-based cross-sectional study was conducted in Debre Berhan town among 500 reproductive age group women. Study participants were selected using two-stage sampling procedures. Data were collected using a semistructured face-to-face interview questionnaire. The data were entered in EpiData V.4.2.0 and then exported to SPSS V.25 software for data analysis. Descriptive statistics such as mean, per cent and frequency were used to summarise women’s characteristics. Binary logistic regression analysis was used to identify predictors’ variables with modern contraceptive discontinuation and p<0.05 was used to declare association.

RESULTS: The prevalence of modern contraceptive discontinuation among married reproductive age group women was 35.2% with a mean duration of use of 2.6±2.1 months. This study also revealed that the discontinuation rate was 12.6% within the first year of use. In the current study, those living with their husband (adjusted OR (AOR)=3.81, p<0.001), experiencing side effects while using modern contraceptives (AOR=2.45, p=0.02), getting counselling service (AOR=5.51, p<0.001) and respondent husband acceptance of her modern contraceptive use (AOR=3.85, p=0.01) were significantly associated with modern contraceptive discontinuation.

CONCLUSION: The findings of this study showed that the prevalence of modern contraceptive discontinuation rate of all methods among married reproductive age group women was 35.2%. To reduce modern contraceptive discontinuation, mutually, it is important to create community awareness about the importance of the continued use of modern contraceptives, improve the quality of family planning service in the health institution, strengthen family planning counselling service and give adequate counselling on details of effectiveness and side effects.

PMID:38684273 | DOI:10.1136/bmjopen-2022-066605

BMJ Open. 2024 Apr 28;14(4):e079953. doi: 10.1136/bmjopen-2023-079953.

ABSTRACT

OBJECTIVES: To examine non-sport- and sport-related concussion severity, clinical care frequency and delayed reporting in relation to recovery duration among collegiate athletes.

DESIGN: Retrospective cohort study.

SETTING: Pac-12 varsity collegiate athletes.

PARTICIPANTS: 461 collegiate male and female athletes PRIMARY AND SECONDARY OUTCOME MEASURES: The incidence of sport-related concussion (SRC) and non-sport-related concussion (NRC) were collected as well as times to recovery and return-to-play (RTP), symptom score and symptom severity and reported a loss of consciousness (LOC), retrograde amnesia (RGA) and post-traumatic amnesia (PTA) following concussion incidence.

RESULTS: Among 461 concussions, 388 (84%) occurred within sport and 73 (16%) occurred outside of sport. NRC, on average, required 3.5 more days to become asymptomatic (HR: 0.73, 95%confidence interval: 0.56 to 0.96, p=0.02) and 7 more days to RTP (HR: 0.64, 95% confidence interval: 0.49 to 0.85, p<0.01) compared with SRC. NRC were associated with an increase of 1.83 (p=0.07) symptoms reported at the time of diagnosis, an increase of 6.95 (p=0.06) in symptom severity and a higher prevalence of reported LOC (22% NRC vs. 3% SRC, p<0.001), PTA (15% NRC vs. 5% SRC, p<0.01) and RGA (10% NRC vs. 4% SRC, p=0.06), compared with SRC. There was no significant difference in clinical care (p=0.28) or immediate reporting (p=0.35) between NRC and SRC.

CONCLUSION: NRC were associated with greater severity and longer recovery duration when compared with SRC in a cohort of collegiate athletes.

PMID:38684271 | DOI:10.1136/bmjopen-2023-079953

BMJ Open. 2024 Apr 28;14(4):e077711. doi: 10.1136/bmjopen-2023-077711.

ABSTRACT

OBJECTIVE: We investigated the prevalence and predictors of workplace sexual harassment against nurses in the Central Region of Ghana.

DESIGN: A cross-sectional online survey.

SETTING: Central Region of Ghana.

PARTICIPANTS: A total of 1494 male and female nurses from various healthcare facilities in the Central Region participated in this survey from August to September 2021.

MAIN OUTCOME MEASURES: The prevalence of sexual harassment was determined using the Sexual Experiences Questionnaires and the Workplace Violence in the Health Sector Questionnaires. We used descriptive statistics to analyse participants’ characteristics and the occurrence of sexual harassment. Binary logistic regression was used to determine the predictors of sexual harassment. The survey instrument yielded a reliability value of 0.82.

RESULTS: The prevalence of sexual harassment was 43.6% when behaviour-based questions were applied and 22.6% when a direct question was used. The main perpetrators of sexual harassment were male physicians (20.2%), male nurses (15.4%), male relatives of patients (15.1%) and male patients (11.6%). Unfortunately, only a few victims lodged complaints of harassment. Compared with males, female nurses were more likely to be sexually harassed (adjusted OR, aOR 1.59, 95% CI 1.23 to 2.07). Moreover, nurses with higher work experience (aOR 0.86, 95% CI 0.80 to 0.93), those married (aOR 0.54, 95% CI 0.41 to 0.72) and those working in private or mission/Christian Health Association of Ghana health facilities (aOR 0.49, 95% CI 0.36 to 0.68) were less likely to be sexually harassed.

CONCLUSIONS: The prevalence of workplace sexual harassment against nurses in the Central Region of Ghana is high and may compromise quality healthcare delivery in the region. Therefore, managers of healthcare facilities and the Ghana Health Service need to institute antisexual harassment interventions, including education, training and policy, with a focus on females in general, but especially those who are not married, less experienced and those working in public health facilities.

PMID:38684266 | DOI:10.1136/bmjopen-2023-077711