Street connectivity, as a neighbourhood built environmental factor, may affect individual physical activity (PA) and subsequently weight status. However, these associations remain inconclusive. This study aimed to systematically review the association between street connectivity and childhood obesity. A literature search was conducted in the Cochrane Library, PubMed, and Web of Science for articles published before January 1, 2019. All original studies that investigated the association between street connectivity and weight-related behaviours or outcomes among children and adolescents were included. Forty-seven articles were identified, including eight longitudinal and 41 cross-sectional studies conducted in eight countries. The sample size ranged from 88 to 46 813. Street intersection density (SID), measured by Geographic Information Systems in 36 studies and reported in 13 studies, was the main indicator used to represent street connectivity. Forty-four studies examined the association between SID and weight-related behaviours, including overall PA (n = 15), moderate-to-vigorous PA (n = 13), active transport (n = 12), dog walking (n = 1), walking (n = 1), sedentary behaviours (n = 2), and TV viewing (n = 1). Fifteen studies focused on the association between SID and weight-related outcomes. Overall, evidence from this systematic review and meta-analyses suggested a positive association between street connectivity and PA. However, it was difficult to draw a conclusion on the association between street connectivity and BMI. More longitudinal evidence is needed to confirm the causal association between street connectivity and weight status.

中文翻译：

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街道连通性、体育活动和儿童肥胖：系统评价和荟萃分析。

街道连通性作为邻里建成的环境因素，可能会影响个人身体活动 (PA) 和随后的体重状况。然而，这些关联仍然没有定论。本研究旨在系统评价街道连通性与儿童肥胖之间的关系。在 Cochrane 图书馆、PubMed 和 Web of Science 中对 2019 年 1 月 1 日之前发表的文章进行了文献检索。所有调查街道连通性与儿童和青少年体重相关行为或结果之间关系的原始研究都包括在内。确定了 47 篇文章，包括在 8 个国家进行的 8 篇纵向研究和 41 篇横断面研究。样本量从 88 到 46 813 不等。街道交叉口密度 (SID)，由地理信息系统在 36 项研究中测量并在 13 项研究中报告，是用于表示街道连通性的主要指标。44 项研究检查了 SID 与体重相关行为之间的关联，包括总体 PA (n = 15)、中度至剧烈 PA (n = 13)、主动运输 (n = 12)、遛狗 (n = 1) )、步行 (n = 1)、久坐行为 (n = 2) 和看电视 (n = 1)。15 项研究侧重于 SID 与体重相关结果之间的关联。总体而言，来自该系统评价和荟萃分析的证据表明街道连通性与 PA 之间存在正相关关系。然而，很难就街道连通性与 BMI 之间的关联得出结论。需要更多纵向证据来确认街道连通性与体重状况之间的因果关系。