Ka Yan Lai

Ka Yan Lai

*This is an algorithmically generated author record based on publicly available information.

Current Organizations / Institutes

The organizations/institutes from the scholar's latest article


Ka Yan Lai has a total of 9 co-authors. Here are the top co-authors by number of shared publications:

  • Iain Scott

    Edinburgh School of Architecture and Landscape Architecture, University of Edinburgh, Edinburgh EH3 9DF, UK

    2 shared publications
  • Ziwen Sun

    Beijing Institute of Technology, Beijing, China

    2 shared publications
  • Chinmoy Sarkar

    Healthy High Density Cities Lab, HKUrbanLab, The University of Hong Kong, Knowles Building, Pokfulam Road, Pokfulam, Hong Kong, China; School of Public Health, The University of Hong Kong, Patrick Manson Building, Sassoon Road, Pokfulam, Hong Kong, China

    1 shared publication
  • Chris Webster

    Healthy High Density Cities Lab, HKUrbanLab, The University of Hong Kong, Knowles Building, Pokfulam Road, Pokfulam, Hong Kong, China

    1 shared publication
  • John Gallacher

    Department of Psychiatry, Oxford University, Warneford Hospital, Oxford, UK

    1 shared publication
  • Lydia W.T. Cheung

    School of Biomedical Sciences, The University of Hong Kong, Laboratory Block, Sassoon Road, Pokfulam, Hong Kong, China

    1 shared publication

Latest Publications

  • Exposure to light at night (LAN) and risk of breast cancer: A systematic review and meta-analysis

    by Ka Yan Lai, Chinmoy Sarkar, Michael Y. Ni, Lydia W.T. Cheung, John Gallacher, Chris Webster


  • Open Access

    Exploring the Associations of Walking Behavior with Neighborhood Environments by Different Life Stages: A Cross-Sectional Study in a Smaller Chinese City

    by Ziwen Sun, Ka Yan Lai, Simon Bell, Iain Scott, Xiaomeng Zhang

    Because of high population density and rapid urbanization, different human life stages have distinct growth experiences, leading to different lifestyles and age-spatial separation in the same neighborhood environment, particularly in smaller Chinese cities. The relationship of environment to physical activity may differ from western or larger Chinese cities. This study examined the associations of walking duration to the neighborhood environment and other factors, and explored the nuances of walking behavior for different life stages of adults in a smaller Chinese city, Yuncheng. An interviewer-administered questionnaire survey (n = 173) and face-to-face interviews (n = 19) were conducted in August 2017. Descriptive analysis and multiple linear regression were performed to describe walking motivations, sociodemographic characteristics, neighborhood environments, and their impacts on walking duration across three life stages. The quantitative findings were followed by interviews to validate and interpret them. Our results showed no positive associations of land-use mix (LUM) and residential density on walking duration, and even inverse associations of LUM-recreation and LUM-education for specific life stages were identified. Younger people’s walking behavior was more related to consumption amenities distinct from those of older people. Our findings suggest that using walkable neighborhood policies (e.g., high residential density and land-use mix) to increase physical activity might be ineffective in smaller Chinese cities.


  • Open Access

    Everyday Use of the City Cemetery: A Study of Environmental Qualities and Perceived Restorativeness in a Scottish Context

    by Ka Yan Lai, Iain Scott, Ziwen Sun

    As the number of historical urban cemeteries where interment is no longer available continues to grow, the everyday use and restorative benefit of these spaces (beyond commemoration and remembrance) is worthy of further exploration. This study primarily investigates the everyday use of two historical urban cemeteries in Edinburgh through behavioural observation (N = 185). We also explore further the relationships between cemetery qualities and perceived restorativeness through an interviewer-administered survey (N = 134) and face-to-face interviews (N = 24) at the sites. The survey findings showed that usage and aesthetics in the cemeteries were both significantly and positively associated with various restorative qualities including ‘being away’, ‘fascination’ and ‘compatibility’. The data provided from the interviews and behavioural observations complement the survey findings that the everyday use of urban cemeteries (i.e., using them as an alternative route for pedestrian journeys or simply walking the dog) could facilitate users’ mental restorative process. After controlling for sociodemographic characteristics, provision of facilities (e.g., benches and toilets) was found to have no significant association with any restorative qualities. Using a mixed method approach, this study provides a novel understanding of how the urban population uses, and perceives, old urban cemeteries in contemporary Scotland.