Browsing by Author "Welch D"

Now showing 1 - 8 of 8
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    Attitudes to noise and behaviour towards hearing protection among Pasifika university students in New Zealand
    (Taylor and Francis Group on behalf of the Royal Society of New Zealand, 2021-01-17) Reddy R; Nosa V; Mafi I; Welch D; Gaffney JS
    It is estimated that 1.1 billion young people worldwide are at risk of hearing loss due to high levels of noise exposure. Hearing loss can contribute to low self-esteem, poor employment prospects and social problems. The aim of this research was to explore the attitudes and beliefs towards noise, hearing loss and hearing protection among Pasifika university students in New Zealand. 96 Pasifika students completed the Youth Attitude to Noise Scale (YANS) and Beliefs About Hearing Protection and Hearing Loss (BAHPHL) questionnaire electronically using a Qualtrics survey. The findings show that the study sample had higher mean scores in the BAHPHL scales related to susceptibility to hearing loss, severity of hearing loss, and benefits of preventive action compared to findings of similar international research. This implies that Pasifika participants had more positive beliefs than their international peers on some factors. Despite their greater awareness, the Pasifika sample had similarly poor attitudes related to minimising loud sounds in the daily environment, perceived barriers towards prevention, behavioural intention and social norms towards hearing conservation. This study provides a good foundation to develop a culturally appropriate hearing conservation intervention aimed at improving hearing-health outcomes among young Pasifika people.
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    Audiological Service Delivery and Uptake in New Zealand Regional Areas.
    (MDPI (Basel, Switzerland), 2023-11-28) Boseley H; Welch D; Reddy R; Silberberg M
    Background: In New Zealand, as in many places, a significant proportion of the population lives outside the main urban centres. People living in regional areas have similar needs for audiological services as those living in urban centres; however, economic and geographical barriers can be a barrier to accessible services. The objective of this research was to explore factors that influence equitable audiological service provision and user uptake of services in regional areas of New Zealand. Methods: Fifteen participants who represented either audiological service users living in rural or non-urban areas (regional) or audiological service providers in these areas were recruited. Semi-structured interviews were conducted virtually and on average took forty minutes to complete. The interviews were transcribed and analysed using thematic analysis to identify themes and subthemes related to audiological service delivery and uptake. Results: Seven themes were identified. These are related to service provision, geographical barriers, and cultural appropriateness. Conclusions: This study provides a basis for understanding the challenges of delivering and accessing audiological services in non-urban areas in New Zealand, and in principle elsewhere. There is scope for future research to further understand policy directions needed to achieve equitable audiological service provision in regional areas.
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    COVID-19 vaccine strategies for Aotearoa New Zealand: a mathematical modelling study
    (Elsevier Ltd, 2021-10) Nguyen T; Adnan M; Nguyen BP; de Ligt J; Geoghegan JL; Dean R; Jefferies S; Baker MG; Seah WKG; Sporle AA; French NP; Murdoch DR; Welch D; Simpson CR
    Background: COVID-19 elimination measures, including border closures have been applied in New Zealand. We have modelled the potential effect of vaccination programmes for opening borders. Methods: We used a deterministic age-stratified Susceptible, Exposed, Infectious, Recovered (SEIR) model. We minimised spread by varying the age-stratified vaccine allocation to find the minimum herd immunity requirements (the effective reproduction number Reff<1 with closed borders) under various vaccine effectiveness (VE) scenarios and R0 values. We ran two-year open-border simulations for two vaccine strategies: minimising Reff and targeting high-risk groups. Findings: Targeting of high-risk groups will result in lower hospitalisations and deaths in most scenarios. Reaching the herd immunity threshold (HIT) with a vaccine of 90% VE against disease and 80% VE against infection requires at least 86•5% total population uptake for R0=4•5 (with high vaccination coverage for 30-49-year-olds) and 98•1% uptake for R0=6. In a two-year open-border scenario with 10 overseas cases daily and 90% total population vaccine uptake (including 0-15 year olds) with the same vaccine, the strategy of targeting high-risk groups is close to achieving HIT, with an estimated 11,400 total hospitalisations (peak 324 active and 36 new daily cases in hospitals), and 1,030 total deaths. Interpretation: Targeting high-risk groups for vaccination will result in fewer hospitalisations and deaths with open borders compared to targeting reduced transmission. With a highly effective vaccine and a high total uptake, opening borders will result in increasing cases, hospitalisations, and deaths. Other public health and social measures will still be required as part of an effective pandemic response. Funding: This project was funded by the Health Research Council [20/1018]. Research in context.
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    Evaluation of the Dangerous Decibels Brazil Program in Workers Exposed to Noise
    (Frontiers Media S.A., 2022-07-14) Bramati L; Marques JM; Gonçalves CGO; Welch D; Reddy R; Lacerda ABDM; Ye B
    INTRODUCTION: Noise-induced hearing loss can be avoided by taking preventive measures. OBJECTIVE: To assess the effectiveness of the Brazilian version of the Dangerous Decibels® program for noise-exposed workers, using the ecological model as an educational intervention plan. METHOD: Non-randomized interventional study with a quantitative, experimental trial design, conducted at a meatpacking company. The participants were divided into two groups-the first one (n = 132, divided into 6 subgroups) received the Dangerous Decibels® Brazil educational intervention (DDBEI) adapted to workers while the second group (n = 138, divided into 5 subgroups) received a conventional educational intervention (CEI). The interventions lasted 50 min. The Hearing Protection Assessment Questionnaire (HPA-5) was administered before and after the interventions. The five dimensions (attitude, behavior, knowledge, supports, and barriers) were compared using the Student's t-test for paired data (<0.05). RESULTS: After both the DDBEI and CEI training, workers improved significantly in barriers, supports, knowledge, attitudes, and behavior around noise. By chance, the CEI group scored lower in all measures than the DDBEI group before training, and though both groups improved, the difference was maintained after training. CONCLUSION: The Brazilian version of the Dangerous Decibels® program for noise-exposed workers was effective, influencing positively the factors at different levels of the ecological model. Though the DDBEI was no more effective than the CEI, the CEI participants began at much lower levels, so the effectiveness of the DDBEI may have been underestimated.
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    Genomic epidemiology of Delta SARS-CoV-2 during transition from elimination to suppression in Aotearoa New Zealand
    (Springer Nature Limited, 2022-07-12) Jelley L; Douglas J; Ren X; Winter D; McNeill A; Huang S; French N; Welch D; Hadfield J; de Ligt J; Geoghegan JL
    New Zealand's COVID-19 elimination strategy heavily relied on the use of genomics to inform contact tracing, linking cases to the border and to clusters during community outbreaks. In August 2021, New Zealand entered its second nationwide lockdown after the detection of a single community case with no immediately apparent epidemiological link to the border. This incursion resulted in the largest outbreak seen in New Zealand caused by the Delta Variant of Concern. Here we generated 3806 high quality SARS-CoV-2 genomes from cases reported in New Zealand between 17 August and 1 December 2021, representing 43% of reported cases. We detected wide geographical spread coupled with undetected community transmission, characterised by the apparent extinction and reappearance of genomically linked clusters. We also identified the emergence, and near replacement, of genomes possessing a 10-nucleotide frameshift deletion that caused the likely truncation of accessory protein ORF7a. By early October, New Zealand moved from an elimination strategy to a suppression strategy and the role of genomics changed markedly from being used to track and trace, towards population-level surveillance.
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    Health effects of transport noise
    (Taylor and Francis Group, 2023-04-26) Welch D; Shepherd D; Dirks KN; Reddy R
    The relationship between transport noise and health outcomes is complex, in part because of the large number of factors involved as well as the range of health impacts, both direct and indirect. To enable the reader to come to grips with the complexity, we have divided the health outcomes into groups: those that are more directly linked to transport noise exposure and those that are more indirectly linked. Four health outcomes, namely annoyance, cognitive disruption, sleep problems, and noise-induced hearing loss, can be directly attributable to transport noise exposure. Less direct outcomes are stress, mental health, metabolic health, cardiovascular health, and overall health-related quality of life. Stress may occur as a direct response to noise, or may occur in response to the aforementioned direct effects. The stress response is a survival mechanism in the short term, but in the long term, stress may lead to systemic health conditions, namely metabolic and cardiovascular outcomes, and to mental health conditions. Finally, a global health outcome that incorporates all of the more direct outcomes is health-related quality of life. Other exposures associated with transport noise that may explain parts of the health outcomes need to be acknowledged, including exposure to social inequities, air pollution, and vibration. These may all be more likely to be experienced by people who are exposed to transport noise in the community and may thus influence the outcomes. Finally, transport noise appears to have more impact on health in those who are noise sensitive, thus noise sensitivity is a key moderator of all the effects observed.
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    Tracing the international arrivals of SARS-CoV-2 Omicron variants after Aotearoa New Zealand reopened its border
    (Springer Nature Limited, 2022-10-29) Douglas J; Winter D; McNeill A; Carr S; Bunce M; French N; Hadfield J; de Ligt J; Welch D; Geoghegan JL
    In the second quarter of 2022, there was a global surge of emergent SARS-CoV-2 lineages that had a distinct growth advantage over then-dominant Omicron BA.1 and BA.2 lineages. By generating 10,403 Omicron genomes, we show that Aotearoa New Zealand observed an influx of these immune-evasive variants (BA.2.12.1, BA.4, and BA.5) through the border. This is explained by the return to significant levels of international travel following the border's reopening in March 2022. We estimate one Omicron transmission event from the border to the community for every ~5,000 passenger arrivals at the current levels of travel and restriction. Although most of these introductions did not instigate any detected onward transmission, a small minority triggered large outbreaks. Genomic surveillance at the border provides a lens on the rate at which new variants might gain a foothold and trigger new waves of infection.
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    Translation, adaptation, and cross-cultural validation into Brazilian portuguese of the hearing protection assessment questionnaire (HPA)
    (Sociedade Brasileira de Fonoaudiologia, 2023-05-01) Bramati L; Gonçalves CGDO; Marques JM; Reddy R; Welch D; Lacerda ABDM
    PURPOSE: The aim of the present study is to translate, adapt, and cross-culturally validate the Brazilian Portuguese version of the questionnaire Hearing Protection Assessment Questionnaire (HPA). METHODS: The original instrument, developed in English, seeks to assess barriers and supports related to the use of hearing protection devices (HPD), as well as workers' knowledge, habits and attitudes towards occupational noise. The translation, adaptation, and cross-cultural validation of the questionnaire consisted of five steps: Translation of the questionnaire from English to Portuguese; 2) Reverse translation from Portuguese to English; 3) Analysis of the instrument by three experts in the field; 4) Pre-test of the questionnaire with ten workers; 5) Application of the instrument to 509 workers in a meatpacking industry after the pre-employment medical exam. RESULTS: The results indicate the construction and content validity of the Brazilian Portuguese version for use with a working population and its internal consistency. CONCLUSION: This study resulted in the translation, cultural adaptation, and validation of the Hearing Protection Assessment Questionnaire (HPA), in order to be used to assess the use of individual hearing protection in the occupational field, called Hearing Protection Assessment Questionnaire (HPA).