For instance, the availability and accessibility of physical acti

For instance, the availability and accessibility of physical activity resources could have more decisive influence on LTPA in densely settled Chinese cities. As a result, it is important to understand these relationships Alectinib in the Chinese context. This study aimed to investigate the association of perceived neighborhood built environment (subjective measurement) with LTPA using a sample of the general adult population in Hangzhou, China. This study was conducted in Hangzhou

from June to December in 2012. The city of Hangzhou, the capital of Zhejiang Province, is situated in the southeast coastal area of China. As an economically developed city, it ranked eighth in 2011 in terms of economic development (Office Information Processing Center

et al.). Three districts of the city were included in this study, i.e., Shangcheng, Xiacheng, and Xihu Districts. All administrative planning units in these three districts are classified into five categories (Yu et al., 2010) based on the degree of land-use mix and public services capacity. A Type I unit is characterized by developed commercial and residential areas, and a high degree of land-use mix. A Type II unit has developed but scattered public buildings (usually consist of buildings for office and governmental, commercial, scientific, educational, cultural, and health related purposes), and lacks comprehensive service capacity. A Type III unit is featured by partly developed and single functional public buildings. Type IV and type V units are mainly composed of farmland and storage warehouses and thus were excluded from this study.

The eligible subjects were individuals aged 25–59 who had lived in the neighborhood for at least one year. University students aged 18–24 were not eligible for this study because they tended to live on campus or were studying in other cities. A multistage random sampling strategy with stratification by functional unit was used in this study. In the first stage, 30 out of 170 neighborhoods (ten neighborhoods in each functional unit) were randomly and selected. In the second stage, households were randomly sampled in each neighborhood from the lists of community households. And the final stage identified one of the eligible persons in each household using the Kish method. All interviewers were asked to have a maximum of three door-to-door visiting attempts per sampled household. A total of 2570 households were selected for participation, and 1444 people completed the survey. At last, 1434 participants were eligible for analysis (ten subjects were excluded because of incomplete data). The study was approved by the Peking University Institutional Review Board (Certificate Number: IRB00001052-11030). Outcome assessment and individual-level data collection were conducted by local CDC staff. Face-to-face interview was used to collect data and all the participants provided written informed consent before the interview.

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