LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 561

Search options

  1. Article ; Online: Evaluating completion rates of COVID-19 contact tracing surveys in New York City.

    He, Kaiyu / Foerster, Steffen / Vora, Neil M / Blaney, Kathleen / Keeley, Chris / Hendricks, Lisa / Varma, Jay K / Long, Theodore / Shaman, Jeffrey / Pei, Sen

    BMC public health

    2024  Volume 24, Issue 1, Page(s) 414

    Abstract: ... surveys in New York City (NYC) and evaluate the utility of a predictive model to improve completion rates ...

    Abstract Importance: Contact tracing is the process of identifying people who have recently been in contact with someone diagnosed with an infectious disease. During an outbreak, data collected from contact tracing can inform interventions to reduce the spread of infectious diseases. Understanding factors associated with completion rates of contact tracing surveys can help design improved interview protocols for ongoing and future programs.
    Objective: To identify factors associated with completion rates of COVID-19 contact tracing surveys in New York City (NYC) and evaluate the utility of a predictive model to improve completion rates, we analyze laboratory-confirmed and probable COVID-19 cases and their self-reported contacts in NYC from October 1st 2020 to May 10th 2021.
    Methods: We analyzed 742,807 case investigation calls made during the study period. Using a log-binomial regression model, we examined the impact of age, time of day of phone call, and zip code-level demographic and socioeconomic factors on interview completion rates. We further developed a random forest model to predict the best phone call time and performed a counterfactual analysis to evaluate the change of completion rates if the predicative model were used.
    Results: The percentage of contact tracing surveys that were completed was 79.4%, with substantial variations across ZIP code areas. Using a log-binomial regression model, we found that the age of index case (an individual who has tested positive through PCR or antigen testing and is thus subjected to a case investigation) had a significant effect on the completion of case investigation - compared with young adults (the reference group,24 years old < age <  = 65 years old), the completion rate for seniors (age > 65 years old) were lower by 12.1% (95%CI: 11.1% - 13.3%), and the completion rate for youth group (age <  = 24 years old) were lower by 1.6% (95%CI: 0.6% -2.6%). In addition, phone calls made from 6 to 9 pm had a 4.1% (95% CI: 1.8% - 6.3%) higher completion rate compared with the reference group of phone calls attempted from 12 and 3 pm. We further used a random forest algorithm to assess its potential utility for selecting the time of day of phone call. In counterfactual simulations, the overall completion rate in NYC was marginally improved by 1.2%; however, certain ZIP code areas had improvements up to 7.8%.
    Conclusion: These findings suggest that age and time of day of phone call were associated with completion rates of case investigations. It is possible to develop predictive models to estimate better phone call time for improving completion rates in certain communities.
    MeSH term(s) Adolescent ; Young Adult ; Humans ; Adult ; Aged ; COVID-19/epidemiology ; Contact Tracing/methods ; New York City/epidemiology ; Surveys and Questionnaires ; Disease Outbreaks
    Language English
    Publishing date 2024-02-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 2041338-5
    ISSN 1471-2458 ; 1471-2458
    ISSN (online) 1471-2458
    ISSN 1471-2458
    DOI 10.1186/s12889-024-17920-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Contact tracing reveals community transmission of COVID-19 in New York City.

    Pei, Sen / Kandula, Sasikiran / Cascante Vega, Jaime / Yang, Wan / Foerster, Steffen / Thompson, Corinne / Baumgartner, Jennifer / Ahuja, Shama Desai / Blaney, Kathleen / Varma, Jay K / Long, Theodore / Shaman, Jeffrey

    Nature communications

    2022  Volume 13, Issue 1, Page(s) 6307

    Abstract: ... their contacts in New York City during the second pandemic wave, we provide a detailed characterization ...

    Abstract Understanding SARS-CoV-2 transmission within and among communities is critical for tailoring public health policies to local context. However, analysis of community transmission is challenging due to a lack of high-resolution surveillance and testing data. Here, using contact tracing records for 644,029 cases and their contacts in New York City during the second pandemic wave, we provide a detailed characterization of the operational performance of contact tracing and reconstruct exposure and transmission networks at individual and ZIP code scales. We find considerable heterogeneity in reported close contacts and secondary infections and evidence of extensive transmission across ZIP code areas. Our analysis reveals the spatial pattern of SARS-CoV-2 spread and communities that are tightly interconnected by exposure and transmission. We find that locations with higher vaccination coverage and lower numbers of visitors to points-of-interest had reduced within- and cross-ZIP code transmission events, highlighting potential measures for curtailing SARS-CoV-2 spread in urban settings.
    MeSH term(s) Humans ; Contact Tracing ; COVID-19/epidemiology ; SARS-CoV-2 ; New York City/epidemiology ; Pandemics/prevention & control
    Language English
    Publishing date 2022-10-23
    Publishing country England
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, P.H.S.
    ZDB-ID 2553671-0
    ISSN 2041-1723 ; 2041-1723
    ISSN (online) 2041-1723
    ISSN 2041-1723
    DOI 10.1038/s41467-022-34130-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article: Contact tracing reveals community transmission of COVID-19 in New York City.

    Pei, Sen / Kandula, Sasikiran / Vega, Jaime Cascante / Yang, Wan / Foerster, Steffen / Thompson, Corinne / Baumgartner, Jennifer / Ahuja, Shama / Blaney, Kathleen / Varma, Jay / Long, Theodore / Shaman, Jeffrey

    Research square

    2022  

    Abstract: ... their contacts in New York City during the second pandemic wave, we provide a detailed characterization ...

    Abstract Understanding SARS-CoV-2 transmission within and among communities is critical for tailoring public health policies to local context. However, analysis of community transmission is challenging due to a lack of high-resolution surveillance and testing data. Here, using contact tracing records for 644,029 cases and their contacts in New York City during the second pandemic wave, we provide a detailed characterization of the operational performance of contact tracing and reconstruct exposure and transmission networks at individual and ZIP code scales. We find considerable heterogeneity in reported close contacts and secondary infections and evidence of extensive transmission across ZIP code areas. Our analysis reveals the spatial pattern of SARS-CoV-2 spread and communities that are tightly interconnected by exposure and transmission. We find that higher vaccination coverage and reduced numbers of visitors to points-of-interest are associated with fewer within- and cross-ZIP code transmission events, highlighting potential measures for curtailing SARS-CoV-2 spread in urban settings.
    Language English
    Publishing date 2022-07-27
    Publishing country United States
    Document type Preprint
    DOI 10.21203/rs.3.rs-1840065/v1
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Community transmission of SARS-CoV-2 during the Delta wave in New York City.

    Dai, Katherine / Foerster, Steffen / Vora, Neil M / Blaney, Kathleen / Keeley, Chris / Hendricks, Lisa / Varma, Jay K / Long, Theodore / Shaman, Jeffrey / Pei, Sen

    BMC infectious diseases

    2023  Volume 23, Issue 1, Page(s) 753

    Abstract: ... testing records, we analyze the transmission of SARS-CoV-2 during the Delta wave within New York City (NYC ...

    Abstract Background: Understanding community transmission of SARS-CoV-2 variants of concern (VOCs) is critical for disease control in the post pandemic era. The Delta variant (B.1.617.2) emerged in late 2020 and became the dominant VOC globally in the summer of 2021. While the epidemiological features of the Delta variant have been extensively studied, how those characteristics shaped community transmission in urban settings remains poorly understood.
    Methods: Using high-resolution contact tracing data and testing records, we analyze the transmission of SARS-CoV-2 during the Delta wave within New York City (NYC) from May 2021 to October 2021. We reconstruct transmission networks at the individual level and across 177 ZIP code areas, examine network structure and spatial spread patterns, and use statistical analysis to estimate the effects of factors associated with COVID-19 spread.
    Results: We find considerable individual variations in reported contacts and secondary infections, consistent with the pre-Delta period. Compared with earlier waves, Delta-period has more frequent long-range transmission events across ZIP codes. Using socioeconomic, mobility and COVID-19 surveillance data at the ZIP code level, we find that a larger number of cumulative cases in a ZIP code area is associated with reduced within- and cross-ZIP code transmission and the number of visitors to each ZIP code is positively associated with the number of non-household infections identified through contact tracing and testing.
    Conclusions: The Delta variant produced greater long-range spatial transmission across NYC ZIP code areas, likely caused by its increased transmissibility and elevated human mobility during the study period. Our findings highlight the potential role of population immunity in reducing transmission of VOCs. Quantifying variability of immunity is critical for identifying subpopulations susceptible to future VOCs. In addition, non-pharmaceutical interventions limiting human mobility likely reduced SARS-CoV-2 spread over successive pandemic waves and should be encouraged for reducing transmission of future VOCs.
    MeSH term(s) Humans ; SARS-CoV-2 ; COVID-19/epidemiology ; New York City/epidemiology ; Coinfection
    Language English
    Publishing date 2023-11-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 2041550-3
    ISSN 1471-2334 ; 1471-2334
    ISSN (online) 1471-2334
    ISSN 1471-2334
    DOI 10.1186/s12879-023-08735-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Behavior-driven forecasts of neighborhood-level COVID-19 spread in New York City

    Zhang, Renquan / Tai, Jilei / Yao, Qing / Yang, Wan / Ruggeri, Kai / Shaman, Jeffrey / Pei, Sen

    medRxiv

    Abstract: The COVID-19 pandemic in New York City (NYC) was characterized by marked disparities in disease ...

    Abstract The COVID-19 pandemic in New York City (NYC) was characterized by marked disparities in disease burdens across neighborhoods. Accurate neighborhood-level forecasts are critical for planning more equitable resource allocation; however, such spatially high-resolution forecasts remain scarce in operational use. Here, we analyze aggregated foot traffic data derived from mobile devices to measure the connectivity among 42 NYC neighborhoods driven by various human activities such as dining, shopping, and entertainment. Using real-world time-varying contact patterns in different place categories, we develop a parsimonious behavior-driven epidemic model that incorporates population mixing, indoor crowdedness, dwell time, and seasonality of virus transmissibility. This process-based model supports accurate modeling of neighborhood-level SARS-CoV-2 transmission throughout 2020. In the best-fitting model, we estimate that the force of infection in indoor settings increases sublinearly with crowdedness and dwell time. Retrospective forecasting demonstrates that this behavior-driven model generates improved short-term forecasts in NYC neighborhoods. This model may be adapted for use with other respiratory pathogens sharing similar transmission routes.
    Keywords covid19
    Language English
    Publishing date 2024-04-19
    Publisher Cold Spring Harbor Laboratory Press
    Document type Article ; Online
    DOI 10.1101/2024.04.17.24305995
    Database COVID19

    Kategorien

  6. Article ; Online: Modeling the early transmission of COVID-19 in New York and San Francisco using a pairwise network model.

    Feng, Shanshan / Luo, Xiao-Feng / Pei, Xin / Jin, Zhen / Lewis, Mark / Wang, Hao

    Infectious Disease Modelling

    2022  Volume 7, Issue 1, Page(s) 212–230

    Abstract: ... in New York and San Francisco and to investigate the factors determining the severity and duration of outbreak ... densities in New York and San Francisco we demonstrate how the outbreak would progress if New York had ... outbreak size in New York, but would reduce the final size in San Francisco by 97%. ...

    Abstract Classical epidemiological models assume mass action. However, this assumption is violated when interactions are not random. With the recent COVID-19 pandemic, and resulting shelter in place social distancing directives, mass action models must be modified to account for limited social interactions. In this paper we apply a pairwise network model with moment closure to study the early transmission of COVID-19 in New York and San Francisco and to investigate the factors determining the severity and duration of outbreak in these two cities. In particular, we consider the role of population density, transmission rates and social distancing on the disease dynamics and outcomes. Sensitivity analysis shows that there is a strongly negative correlation between the clustering coefficient in the pairwise model and the basic reproduction number and the effective reproduction number. The shelter in place policy makes the clustering coefficient increase thereby reducing the basic reproduction number and the effective reproduction number. By switching population densities in New York and San Francisco we demonstrate how the outbreak would progress if New York had the same density as San Francisco and vice-versa. The results underscore the crucial role that population density has in the epidemic outcomes. We also show that under the assumption of no further changes in policy or transmission dynamics not lifting the shelter in place policy would have little effect on final outbreak size in New York, but would reduce the final size in San Francisco by 97%.
    Language English
    Publishing date 2022-01-05
    Publishing country China
    Document type Journal Article
    ZDB-ID 3015225-2
    ISSN 2468-0427 ; 2468-2152
    ISSN (online) 2468-0427
    ISSN 2468-2152
    DOI 10.1016/j.idm.2021.12.009
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: New York Dairy Farms’ Adoption of Management Tactics During the 2009 Economic Slowdown

    Pei Xu / Todd Lone

    International Journal of Business and Management, Vol 7, Iss

    2012  Volume 6

    Abstract: New York dairy farmers’ adoption of management tactics to reduce the impacts from the economic ...

    Abstract New York dairy farmers’ adoption of management tactics to reduce the impacts from the economic downturn was studied using survey data collected from 101 dairy operations in 2009. A Canonical Discriminate Analysis was used and results indicate that managers who practice more management tactics tend to operate a larger herd, hold a leadership position in dairy organizations, and feel pressure from the adverse economy. Prevailing tactics dairy farms have practiced to lower production costs include: reduce feed spoilage (90%), control utility costs (89%), reducefeed protein and additives (72% and 71% respectively), and cull cows (67%). Farm managers who have small acreages and feel financial pressure have actively sought help from various agricultural assistance programs, whereas larger operations have not.
    Keywords Business ; HF5001-6182 ; Commerce ; HF1-6182 ; Social Sciences ; H
    Language English
    Publishing date 2012-03-01T00:00:00Z
    Publisher Canadian Center of Science and Education
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  8. Article: Another Look at the New York City School Voucher Experiment

    Krueger, Alan B / Zhu, Pei

    American behavioral scientist. 2004 Jan., v. 47, no. 5

    2004  

    Abstract: This article reexamines data from the New York City school choice program, the largest and best ...

    Abstract This article reexamines data from the New York City school choice program, the largest and best-implemented private school scholarship experiment yet conducted. In the experiment, low-income public school students in kindergarten to Grade 4 were eligible to participate in a series of lotteries for a private school scholarship in May 1997. Data were collected from students and their parents at baseline and in the spring of each of the next 3 years. Students with missing baseline test scores, which encompasses all those who were initially in kindergarten and 11% of those initially in Grades 1 to 4, were excluded from previous analyses of achievement, even thoughthese students were tested in the follow-up years. In principle, random assignment would be expected to lead treatment status to be uncorrelated with all baseline characteristics. In addition, it was found that the effect of vouchers was sensitive to the particular way race/ethnicity was defined.
    Keywords kindergarten ; nationalities and ethnic groups ; parents ; public schools ; spring ; students ; New York
    Language English
    Dates of publication 2004-01
    Size p. 658-698.
    Publishing place SAGE Publications
    Document type Article
    ISSN 1552-3381
    DOI 10.1177/0002764203260152
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  9. Book: Another look at the New York City school voucher experiment

    Krueger, Alan B / Zhu, Pei

    (Discussion paper series / Forschungsinstitut zur Zukunft der Arbeit ; 663)

    2002  

    Author's details Alan B. Krueger; Pei Zhu
    Series title Discussion paper series / Forschungsinstitut zur Zukunft der Arbeit ; 663
    Keywords Schulpolitik ; Gutscheinsystem ; Test ; Niedrigeinkommen ; New York
    Language English
    Size 32, [8] S
    Publisher IZA
    Publishing place Bonn
    Document type Book
    Database ECONomics Information System

    More links

    Kategorien

  10. Book: Another look at the New York City school voucher experiment

    Krueger, Alan B / Zhu, Pei

    (NBER working paper series ; 9418)

    2002  

    Author's details Alan B. Krueger; Pei Zhu
    Series title NBER working paper series ; 9418
    Keywords Schulpolitik ; Gutscheinsystem ; Test ; Niedrigeinkommen ; New York (NY)
    Language English
    Size 33, [9] S
    Publisher NBER
    Publishing place Cambridge, Mass
    Document type Book
    Database ECONomics Information System

    More links

    Kategorien

To top