Hinckson Erica, Cerin Ester, Mavoa Surzanne, Smith Melody, Badland Hannah, Witten Karen, Kearns Robin, Schofield Grant
Human Potential Centre, Auckland University of Technology, Auckland, New Zealand.
Institute for Health and Ageing, Australian Catholic University, Melbourne, Victoria, Australia.
BMJ Open. 2017 Oct 22;7(10):e016128. doi: 10.1136/bmjopen-2017-016128.
We estimated associations between objectively determined neighbourhood 'walkability' attributes and accelerometer-derived sedentary time (ST) by sex, city or type of day.
A cross-sectional study.
The URBAN (Understanding the Relationship between Activity and Neighbourhoods) study was conducted in 48 neighbourhoods across four cities in New Zealand (August 2008 to October 2010).
The response rate was 41% (2029 recruited participants/5007 eligible households approached). In total, 1762 participants (aged 41.4±12.1, mean±SD) met the data inclusion criteria and were included in analyses.
The exposure variables were geographical information system (GIS) measures of neighbourhood walkability (ie, street connectivity, residential density, land-use mix, retail footprint area ratio) for street network buffers of 500 m and 1000 m around residential addresses. Participants wore an accelerometer for 7 days. The outcome measure was average daily minutes of ST.
Data were available from 1762 participants (aged 41.4±12.1 years; 58% women). No significant main effects of GIS-based neighbourhood walkability measures were found with ST. Retail footprint area ratio was negatively associated with sedentary time in women, significant only for 500 m residential buffers. An increase of 1 decile in street connectivity was significantly associated with a decrease of over 5 min of ST per day in Christchurch residents for both residential buffers.
Neighbourhoods with proximal retail and higher street connectivity seem to be associated with less ST. These effects were sex and city specific.
我们按性别、城市或日期类型，估计了客观确定的邻里“可步行性”属性与加速度计测量得出的久坐时间（ST）之间的关联。
一项横断面研究。
“城市（了解活动与邻里关系）”研究在新西兰四个城市的48个邻里中进行（2008年8月至2010年10月）。
回复率为41%（招募了2029名参与者/接触了5007户符合条件的家庭）。共有1762名参与者（年龄41.4±12.1岁，均值±标准差）符合数据纳入标准并被纳入分析。
暴露变量是居住地址周围500米和1000米街道网络缓冲区的邻里可步行性的地理信息系统（GIS）测量指标（即街道连通性、居住密度、土地利用混合、零售占地面积比率）。参与者佩戴加速度计7天。结局指标是ST的平均每日分钟数。
有1762名参与者（年龄41.4±12.1岁；58%为女性）的数据。未发现基于GIS的邻里可步行性测量指标与ST有显著的主要影响。零售占地面积比率与女性的久坐时间呈负相关，仅在500米居住缓冲区显著。对于两个居住缓冲区，克赖斯特彻奇居民的街道连通性每增加1个十分位数，与每天ST减少超过5分钟显著相关。
附近有零售设施且街道连通性较高的邻里似乎与较少的ST相关。这些影响具有性别和城市特异性。
