Public Locations Research Articles

Abstract 22: Racial And Ethnic Differences In Bystander Cardiopulmonary Resuscitation For Witnessed Out-of-Hospital Cardiac Arrest

Background: Racial disparities in bystander cardiopulmonary resuscitation (CPR) treatment contributes to inequities in survival for out-of-hospital cardiac arrest (OHCA). Whether bystander CPR rates differ by race/ethnicity for witnessed OHCAs in public settings is unclear but critical to understand for informing public health interventions. Methods: Within the Cardiac Arrest Registry to Enhance Survival, we identified 110,054 witnessed OHCAs during 2013-2019. Using hierarchical logistic regression, we compared rates of bystander CPR in Blacks/Hispanics vs. Whites for OHCAs at home vs. in public locations, overall and by neighborhood race and income groups. Results: Overall, 35,469 (32.2%) witnessed OHCAs occurred in Black/Hispanic individuals and 25,758 (23.4%) OHCAs occurred in public locations. Blacks/Hispanics were less likely to receive bystander CPR at home (38.5% vs. 47.4% for Whites; adjusted OR [aOR]=0.74 [95% CI: 0.71-0.76]) and in public (45.6% vs. 60.0%; aOR=0.59 [0.56-0.63]), and the magnitude of this disparity was greater for OHCAs occurring in public ( P for interaction <0.001). Lower bystander CPR rates for Blacks/Hispanics at home and in public were found in majority Black/Hispanic, Integrated, and predominantly White neighborhoods ( Table ), and the magnitude of this difference was greater for public OHCAs in each neighborhood race/ethnicity stratum (all P- values for interaction < 0.02). A similar pattern was found in high, middle, and low-income neighborhoods, with lower bystander CPR rates for Blacks/Hispanics at home and in public and a larger treatment disparity for OHCAs in public vs. at home in each income strata (all P- values for interaction < 0.001). Conclusions: Black and Hispanic victims of witnessed OHCA are less likely to receive potentially life-saving bystander CPR, as compared with White patients, and the magnitude of this disparity was greater for OHCAs witnessed in public than at home.

Strategic placement of automated external defibrillators (AEDs) for cardiac arrests in public locations and private residences

AimThe aim of our study was to determine whether businesses can be identified that rank highly for their potential to improve coverage of out-of-hospital cardiac arrests (OHCAs) by automated external defibrillators (AEDs), both in public locations and private residences. MethodsThe cohort comprised 10,422 non-traumatic OHCAs from 2014 to 2020 in Perth, Western Australia. We ranked 115 business brands (across 5,006 facilities) for their potential to supplement coverage by the 3,068 registered public-access AEDs in Perth, while accounting for AED access hours. ResultsRegistered public-access AEDs provided 100 m coverage of 23% of public-location arrests, and 4% of arrests in private residences. Of the 10 business brands ranked highest for increasing the coverage of public OHCAs, six brands were ranked in the top 10 for increased coverage of OHCAs in private residences. A public phone brand stood out clearly as the highest-ranked of all brands, with more than double the coverage-increase of the second-ranked brand. If all 115 business brands hosted AEDs with 24–7 access, 57% of OHCAs would remain without 100 m coverage for public arrests, and 92% without 100 m coverage for arrests in private residences. ConclusionMany businesses that ranked highly for increased coverage of arrests in public locations also rank well for increasing coverage of arrests in private residences. However, even if the business landscape was highly saturated with AEDs, large gaps in coverage of OHCAs would remain, highlighting the importance of considering other modes of AED delivery in metropolitan landscapes.

Measuring the Effect of Audio Instructions on the Time and Effectiveness of Tourniquet Application by Laypeople

Objective The “Stop the Bleed” campaign was created to educate laypeople about bleeding control and make bleeding control kits available in public locations. Unfortunately, previous research has indicated that up to half of all laypeople cannot effectively apply a tourniquet. The purpose of this study was to determine if laypeople could apply tourniquets more effectively with just-in-time training using combined audio-written instructions versus written-only instructions. Methods We conducted a prospective randomized study comparing the application of a tourniquet using a simulated bleeding arm. Participants were laypeople 18 years and older and excluded those with any previous tourniquet experience or training. Participants were randomized to just-in-time training using either audio-written or written-only instructions. Time in seconds to tourniquet application and the effectiveness of the tourniquet application was recorded. Effective application was defined as stopping the flow or significantly slowing the flow to a slow drip. Ineffective tourniquet placement was defined as not significantly changing the flow. Statistical analysis was performed using Fisher's exact, t-test, and linear regression. Results Eighty-two participants were included; 40 were in the audio-written instructions group, and 58.5% were male. The audio-written group's effective application rate was 92.5% and that of the written-only group was 76.2%. A significantly higher rate of ineffective tourniquet application was noted for the written-only group (23.8%), versus the audio-written group (7.5%), p = .04. Regardless of the type of instructions used, time to effective application of the tourniquet decreased as participant age increased (p = 0.02, 95%CI (−1.24, −0.13). There was no relationship between age and effective tourniquet application (p = 0.06). Time for tourniquet placement was not different between the audio-written (mean 100.4 seconds) and written-only (mean 106.1 seconds) groups (p = 0.58). Conclusion This study suggests that combined audio-written instructions decrease the rate of ineffective tourniquet application by laypeople compared with written-only instructions. Further studies are needed to assess if audio instructions and just-in-time training can further maximize effective tourniquet application.

A Bibliometric Analysis of Review Types Published in the Nursing Scientific Literature.

Reviews in the nursing scientific literature have steadily expanded in scope and range. This has resulted in a variety of terms used to describe these reports found in bibliographic databases, creating confusion. This study investigated the status of reviews in the published nursing literature, including: (1) number of reviews; (2) conventions related to naming and description; (3) publication location; and (4) areas of clarity and inconsistency. Eighty-five percent of reviews (n = 5893) included in this study adhered to an identified review strategy, complete with a clear approach. The remainder (n = 981, 15%) did not. Authors of reviews must follow the identified protocol for their review type and share all relevant information including standards and rigor. Editors and peer reviewers need to possess up-to-date knowledge on methodologies associated with specific review types.

Regional opening strategies with commuter testing and containment of new SARS-CoV-2 variants in Germany

BackgroundDespite the vaccination process in Germany, a large share of the population is still susceptible to SARS-CoV-2. In addition, we face the spread of novel variants. Until we overcome the pandemic, reasonable mitigation and opening strategies are crucial to balance public health and economic interests.MethodsWe model the spread of SARS-CoV-2 over the German counties by a graph-SIR-type, metapopulation model with particular focus on commuter testing. We account for political interventions by varying contact reduction values in private and public locations such as homes, schools, workplaces, and other. We consider different levels of lockdown strictness, commuter testing strategies, or the delay of intervention implementation. We conduct numerical simulations to assess the effectiveness of the different intervention strategies after one month. The virus dynamics in the regions (German counties) are initialized randomly with incidences between 75 and 150 weekly new cases per 100,000 inhabitants (red zones) or below (green zones) and consider 25 different initial scenarios of randomly distributed red zones (between 2 and 20% of all counties). To account for uncertainty, we consider an ensemble set of 500 Monte Carlo runs for each scenario.ResultsWe find that the strength of the lockdown in regions with out of control virus dynamics is most important to avoid the spread into neighboring regions. With very strict lockdowns in red zones, commuter testing rates of twice a week can substantially contribute to the safety of adjacent regions. In contrast, the negative effect of less strict interventions can be overcome by high commuter testing rates. A further key contributor is the potential delay of the intervention implementation. In order to keep the spread of the virus under control, strict regional lockdowns with minimum delay and commuter testing of at least twice a week are advisable. If less strict interventions are in favor, substantially increased testing rates are needed to avoid overall higher infection dynamics.ConclusionsOur results indicate that local containment of outbreaks and maintenance of low overall incidence is possible even in densely populated and highly connected regions such as Germany or Western Europe. While we demonstrate this on data from Germany, similar patterns of mobility likely exist in many countries and our results are, hence, generalizable to a certain extent.

Collective health behavior and face mask utilization during the COVID-19 pandemic in Oklahoma, USA.

BackgroundFace mask use offers an important public health tool for reducing the spread of coronavirus disease 2019 (COVID-19), yet the politicization of COVID-19 has resulted in uneven adherence. This study assesses the effects of setting characteristics and the sociodemographic composition of crowds on group-level masking rates.MethodsWe conducted 123 site observations of masking behavior at public locations across Oklahoma (USA) between June and September 2020. We used analyses of variance and t-tests to examine variation in masking and ordinary least squares regression to model the effect of setting and sociodemographic characteristics on site-level masking rates.ResultsThe masking rate across all sites averaged 34% but varied widely. Site-level masking rates were higher at metropolitan sites and sites with a store or municipal masking mandate. The masking rate at sites where women or older adults (60+) were the predominant group did not differ significantly from other sites. Ethnically diverse sites exhibited significantly higher masking rates compared with predominantly white sites. Findings indicate that setting characteristics explained a greater amount of variation in collective masking rates than sociodemographic differences.ConclusionsThis study underscores the importance of place and policy for mask adherence. In the absence of state-level mandates, masking policies at a more local level may be effective.

Survey of Anomaly Detection Techniques in Intelligent Surveillance Systems

Smart surveillance systems are used to monitor specific regions such as houses, businesses, and borders. For a long time, abnormality detection in time-series data has been a significant study area. In today's society, unusual conduct signifies a threat or risk to others. An anomaly is something that deviates from what is anticipated, common, or usual. The most unexpected aspect of human behavior is determining if it is dubious or normal. It is extremely difficult to continually monitor public locations. Effective monitoring methods are critical to consistently increase the demand for successful inspection of open areas, handling difficulties such as traffic congestion, and ambiguities in crowded scenes.

Research on Location Characteristics of UCF Layout Based on DNSCAN Algorithm

Since the reform and opening up, the prosperity of culture has always been the strong desire of the party and the country, and repeatedly put forward the goal of improving the public cultural service system (PCSS), requiring priority development of infrastructure construction related to the vital cultural interests of the people. Urban cultural facilities (UCF) are an important material basis in the cultural service system. The essential assurance for achieving the goal of developing a PCSS that covers the entire community is to improve the layout of cultural facilities (CF) and to allocate CF in a scientific and reasonable manner. This research examines the geographical layout characteristics of CF in Xiamen using POI data from libraries, art galleries, and museums crawled by Baidu API and spatial statistical tools such as ArcGIS. Taking the interest points of cultural promote serving residents as research objects, the advancement of spatial pattern of CF in Zhengzhou in 2007 and 2017 was quantitatively analyzed by using standard deviation ellipse and kernel density analysis. The paper compares and analyzes the location distribution characteristics of museums, libraries, cultural centers, art galleries and theaters from two aspects of macro spatial form and microgathering center. Residents’ behavioral characteristics are introduced to examine the influence on the spatial form of CF, and appropriate suggestions are made for the planning and development of CF in Zhengzhou, based on large-scale field survey data and geographical detectors. This article, on the analysis of the state and international public facilities location layout on the basis of optimization study, starting from the present circumstances of urban public sports facilities layout, puts forward the geographic information system (GIS) technology and local approximation (LA) model is introduced into urban public sports service facility location, using DNSCAN network analysis function of urban public sports facilities in site selection and layout optimization, Provide a new method for site selection of sports facilities. And the actual case analysis, in order to provide a reference for the future location layout of public service facilities. Zhengzhou cultural resources through the establishment of GIS database, investigation, cultural needs, put forward the planning should not only include public CF, CF planning should also include the cultural heritage, cultural creative industry, and put forward the development strategy of the construction of the overall urban culture network, realize the cultural space planning and career planning, the fusion of the culture industry planning.

Understanding the Importance of the Lay Responder Experience in Out-of-Hospital Cardiac Arrest: A Scientific Statement From the American Heart Association.

Bystander cardiopulmonary resuscitation (CPR) is critical to increasing survival from out-of-hospital cardiac arrest. However, the percentage of cases in which an individual receives bystander CPR is actually low, at only 35% to 40% globally. Preparing lay responders to recognize the signs of sudden cardiac arrest, call 9-1-1, and perform CPR in public and private locations is crucial to increasing survival from this public health problem. The objective of this scientific statement is to summarize the most recent published evidence about the lay responder experience of training, responding, and dealing with the residual impact of witnessing an out-of-hospital cardiac arrest. The scientific statement focuses on the experience-based literature of actual responders, which includes barriers to responding, experiences of doing CPR, use of an automated external defibrillator, the impact of dispatcher-assisted CPR, and the potential for postevent psychological sequelae. The large body of qualitative and observational studies identifies several gaps in crucial knowledge that, if targeted, could increase the likelihood that those who are trained in CPR will act. We suggest using the experience of actual responders to inform more contextualized training, including the implications of performing CPR on a family member, dispelling myths about harm, training and litigation, and recognition of the potential for psychologic sequelae after the event.

ASSESSMENT OF THE FACTORS THAT LED TO THE DETERIORATION AND DECLINE OF CITRUS TREES IN AL-ZAHRA AREA, LIBYA

This research looked at the markers and causes of citrus tree degeneration and decline in the Al-Zahra region. Using a model and sending a questionnaire to 60 farmers, the hypothesis of deterioration and decrease in citrus trees and the causes that contributed to the deterioration and decrease was produced via the research issue. During the examination of the unique questionnaire, where the percentage was in a row, the portion connected to water quality, type of irrigation, soil, and their purposes. The majority of sample members said that the water quality is invalid, and they employed the sprinkler irrigation method 90% of the time.
 In terms of agricultural operations, where the questionnaire included several factors as an indicator of deterioration and decrease, it was recorded that organic fertilization was not used; the percentage reached 86.3 percent, followed by chemical fertilization at 70%, tillage at 70%, and the presence of light pruning at a high rate of 70%. As for the outcomes of urban development, taking into account that it is one common component, and summarizing the scenario, that involves the building of roads and amenities! There is an influence of export and displacement due to industrial, closeness and distance from the public road, factories, location, and occupational status. When the arithmetic mean of all the parameters was calculated, it became evident that 72 percent had an influence on the decline of citrus trees, whereas 28 percent do not.

A Study on Input and Response Process Parameter for Drilling Operation

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A real time face mask detection system using convolutional neural network.

In current times, after the rapid expansion and spread of the COVID-19 outbreak globally, people have experienced severe disruption to their daily lives. One idea to manage the outbreak is to enforce people wear a face mask in public places. Therefore, automated and efficient face detection methods are essential for such enforcement. In this paper, a face mask detection model for static and real time videos has been presented which classifies the images as “with mask” and “without mask”. The model is trained and evaluated using the Kaggle data-set. The gathered data-set comprises approximately about 4,000 pictures and attained a performance accuracy rate of 98%. The proposed model is computationally efficient and precise as compared to DenseNet-121, MobileNet-V2, VGG-19, and Inception-V3. This work can be utilized as a digitized scanning tool in schools, hospitals, banks, and airports, and many other public or commercial locations.

Characteristics, prognostic factors, and chronological trends of out-of-hospital cardiac arrests with shockable rhythms in Taiwan – A 7-year observational study

The study aimed to explore the characteristics, predictors, and chronological trends of outcomes for adult out-of-hospital cardiac arrests (OHCAs) with shockable rhythms. A 7-year, community-wide observational study using an Utstein-style registry was conducted. Patients who were not transported, those who experienced trauma and those who lacked electronic electrocardiography data were excluded; those with initial shockable rhythms of ventricular fibrillation (VF) or pulseless ventricular tachycardia (pVT) were included. Outcomes were survival of discharge (SOD) and favorable neurological status (CPC 1-2). The outcome predictors, chronological trends, and their relationship with system interventions were analyzed. Of the 1544 shockable OHCAs (incidence 12.6%) included, 97.6% had VF and 2.4% had pVT. VF showed better outcomes than pVT. Predictors for both outcomes (SOD; CPC 1-2) were chronological change (adjusted odds ratio [aOR]: 1.133; 1.176), younger age (aOR: 0.973; 0.967), shorter response time (aOR: 0.998; 0.999), shorter scene time (aOR: 0.999; 0.999), witnessed collapse (aOR: 1.668; 1.670), and bystander cardiopulmonary resuscitation (BCPR) (aOR: 1.448; 1.576). Predictors for only SOD were public location (aOR: 1.450) and successful prehospital defibrillation (aOR: 3.374). The use of the supraglottic airway was associated with adverse outcomes. Chronologically with system interventions, BCPR rate, the proportion of shockable OHCA, and improved neurological outcomes increased over time. The incidence of shockable OHCA remained low in Asian community. VF showed better outcomes than pVT. Over time, the incidence of shockable rhythm, BCPR rate and patient outcomes did improve with health system interventions. The number of prehospital defibrillations did not predict outcomes.

It\u2019s just a breast: an examination of the effects of sexualization, sexism, and breastfeeding familiarity on evaluations of public breastfeeding

BackgroundDespite the legal right to breastfeed in public, women may be concerned about negative reactions from others, which may in turn impact their decision to breastfeed in public. The current study examined whether women breastfeeding in public (e.g., at a coffee shop) would be evaluated differently than women breastfeeding in private (e.g., at home) and explored several explanations for the possible differences: sexualization of the female breast (including the perceivers’ gender and sexual comfort level, as well as the exposure of the breast while breastfeeding), sexist attitudes, and familiarity with breastfeeding.MethodsIn August 2018, 506 adult participants, residing in the United States and recruited from Amazon Mechanical Turk, were randomly assigned to view an image of a woman breastfeeding (or not) while wearing a cover (or not), in a private or public location. Participants then completed measures of their emotional responses, perceptions, and behavioral intentions toward the woman in the image as well as their sexual comfort level, hostile and benevolent sexism, and knowledge of and experience with breastfeeding.ResultsPeople had more favorable evaluations of breastfeeding (vs. non-breastfeeding) women, especially when they had greater sexual comfort, were more knowledgeable about breastfeeding, and were parents with at least one child who was breastfed. The location (public vs. private) and the presence or absence of a cover did not differentially influence evaluations of breastfeeding and non-breastfeeding women, nor did participants’ gender or level of sexist attitudes.ConclusionsIn general, people’s evaluations of breastfeeding appear to be favorable to the degree that the location of the breastfeeding is not particularly relevant to those evaluations.

Exploring News Coverage About Plant-Based Milk: A Content Analysis

Plant-based milk has provided more options to consumers who are looking for an alternative to dairy milk. Recently, sales of plant-based milk have increased while dairy milk has continued to decline. To gather more insight into what is being discussed in news coverage about plant-based milk, a quantitative content analysis was conducted on 250 articles published from 2011 to 2020. These articles were coded for word count, location of publication, frame, and article type. The seven frames used to describe plant-based milk were Environment, Animal Welfare, Health, Economics, Labeling, Taste, and Trend. There was an increase in articles published each year, with the most articles published in 2019. The Trend frame was the most popular frame followed by Taste and Health. The Trend frame is related to the growing popularity of plant-based milk. Many Taste articles were written in the form of recipes, which gives inspiration to the reader to use plant-based milk while cooking or baking. The use of the Health frame focused on nutritional information and support of using plant-based milk as an alternative for lactose intolerance or milk allergy. Overall, this study indicated that most plant-based milk news coverage focuses on discussing popularity, consumption, and innovation about plant-based milk. Recommendations for future research and practice are provided.

Out-of-hospital cardiac arrests and bystander response by socioeconomic disadvantage in communities of New South Wales, Australia

Background & aimBystander response to out-of-hospital cardiac arrest (OHCA) may relate to area-level factors, including socioeconomic status (SES). We aimed to examine whether OHCA among individuals in more disadvantaged areas are less likely to receive bystander cardiopulmonary resuscitation (CPR) compared to those in more advantaged areas. MethodsWe analysed data on OHCAs in New South Wales, Australia collected prospectively through a statewide, population-based register. We excluded non-medical arrests; arrests witnessed by a paramedic; occurring in a medical centre, nursing home, police station; or airport, and among individuals with a Do-Not-Resuscitate order. Area-level SES for each arrest was defined using the Australian Bureau of Statistics’ Index of Relative Socioeconomic Disadvantage and its relationship to likelihood of receiving bystander CPR was examined using hierarchical logistic regression models. ResultsOverall, 39% (6622/16,914) of arrests received bystander CPR (71% of bystander-witnessed). The OHCA burden in disadvantaged areas was higher (age-standardised incidence 76–87/100,000/year in more disadvantaged quintiles 1–4 versus 52 per 100,000/year in most advantaged quintile 5). Bystander CPR rates were lower (38%) in the most disadvantaged quintile and highest (42%) in the most advantaged SES quintile. In adjusted models, younger age, being bystander-witnessed, arresting in a public location, and urban location were all associated with greater likelihood of receiving bystander CPR; however, the association between area-level SES and bystander CPR rate was not significant. ConclusionsThere are lower rates of bystander CPR in less advantaged areas, however after accounting for patient and location characteristics, area-level SES was not associated with bystander CPR. Concerted efforts to engage with communities to improve bystander CPR in novel ways could improve OHCA outcomes.

Gender disparities among adult recipients of layperson bystander cardiopulmonary resuscitation by location of cardiac arrest in Pan-Asian communities: A registry-based study.

SummaryBackgroundBystander cardiopulmonary resuscitation (BCPR) is a critical component of the 'chain of survival' in reducing mortality among out-of-hospital cardiac arrest (OHCA) victims. Inconsistent findings on gender disparities among adult recipients of layperson BCPR have been reported in the literature. We aimed to fill this knowledge gap by investigating the extent of gender disparities in a cross-national setting within Pan-Asian communities.MethodsWe utilised data collected from the Pan-Asian Resuscitation Outcomes Study (PAROS), an international, multicentre, prospective study conducted between 2009 and 2018. We included all OHCA cases with non-traumatic arrest aetiology transported by emergency medical services and excluded study sites that did not consistently collect information about the location of cardiac arrest. Logistic regression was used to analyse the association between gender and BCPR, stratified by location.FindingsWe analysed a cohort of 56,192 OHCA cases with an overall BCPR rate of 36.2% (20,329/56,192). At public locations, the BCPR rate was 31.2% (631/2022) for female and 36.4% (3235/8892) for male OHCA victims; while at home, the rate was 38.3% (6838/17,842) for females and 35.1% (9625/27,436) for males. Controlling for site differences and several factors in multivariable logistic regression, we found females less likely to receive BCPR than males in public locations (odds ratio [OR]=0.89, 95% confidence interval [CI]: 0.70–0.99), but more likely to receive BCPR at home (OR=1.16, 95% CI: 1.11–1.21).InterpretationIn Pan-Asian communities, gender differences exist in adult recipients of BCPR and differ between home and public locations. Future studies should account for additional information on bystanders and societal factors to identify targets for interventions.FundingThe study was supported by grants from the National Medical Research Council (NMRC/CSA/0049/2013) and Laerdal Foundation (20040).

Consolidation chemotherapy in postmolar low-risk gestational trophoblastic neoplasia: a systematic review protocol

IntroductionCurrent evidence remains insufficient to strongly demonstrate the benefits of consolidation chemotherapy to all women with low-risk gestational trophoblastic neoplasia (GTN). This protocol outlines a systematic review to investigate whether...

Perspectives of community processes in establishing community-based mental health services in Hong Kong: a case study

BackgroundIntegrated Community Centres for Mental Wellness (ICCMWs) provide district-based community support services for patients discharged from mental health facilities and other residents in Hong Kong. However, selecting locations for these community centres is challenging primarily because of community opposition, which has introduced barriers to responses to service users’ interests and the operations of individual centres. This study examines public preferences for conflict resolution options, evaluates the feasibility of different consultation approaches, identifies effective methods for reducing public opposition and recommends possible approaches to public consultation and location selection.MethodsA total of 74 individual interviews were conducted with key informants, including government personnel, service operators, politicians, resident representatives, community activists and service users. These interviewees were asked about their knowledge, experiences and perspectives of centre location selection processes.ResultsInterviews revealed that neighbourhood consultations for establishing community centres for mental wellness are time-consuming and did not yield a consensus of support from residents. In some instances, the government may decide to delay or withdraw location selection plans because of strong public opposition mainly because of bias and misunderstanding towards service users. However, the role of local politicians in mediating neighbourhood opinions and the government’s determination in planning location selection are essential for successfully selecting ICCMW locations.ConclusionGovernment departments should develop stronger collaboration to study target neighbourhoods and lobby stakeholders at earlier stages. Such investigations should involve identifying key stakeholders, the political and social dynamics of controversies and community demographics. A protocol specifying a time frame should be implemented to facilitate smooth and effective public consultation and community mental health service location selection processes.

A Robust GNSS/PDR Integration Scheme with GRU-Based Zero-Velocity Detection for Mass-Pedestrians

Aiming at the problem of high-precision positioning of mass-pedestrians with low-cost sensors, a robust single-antenna Global Navigation Satellite System (GNSS)/Pedestrian Dead Reckoning (PDR) integration scheme is proposed with Gate Recurrent Unit (GRU)-based zero-velocity detector. Based on the foot-mounted pedestrian navigation system, the error state extended Kalman filter (EKF) framework is used to fuse GNSS position, zero-velocity state, barometer elevation, and other information. The main algorithms include improved carrier phase smoothing pseudo-range GNSS single-point positioning, GRU-based zero-velocity detection, and adaptive fusion algorithm of GNSS and PDR. Finally, the scheme was tested. The root mean square error (RMSE) of the horizontal error in the open and complex environments is lower than 1 m and 1.5 m respectively. In the indoor elevation experiment where the elevation difference of upstairs and downstairs exceeds 25 m, the elevation error is lower than 1 m. This result can provide technical reference for the accurate and continuous acquisition of public pedestrian location information.