S1 Dataset -

Social capital, often seen as the resources accessed through social connections, is currently gaining much attention in public health. However, limited studies have focused on the relationship between social capital and reproductive health services. Besides, while the factors associated with the use of reproductive health services among the youth are well documented in the literature, most studies have focused on narrowed perspective failing to take cognisance of the role of social capital. Yet, it is known that these behaviours can be influenced by social factors, which may be beyond the individual’s control partly because the youth are embedded in social organisations. Therefore, this study examined the relationship between social capital and the youth’s utilisation of reproductive health services.The study population comprised adolescents and young adults aged 15–24 years who were both in and out of school at the time of the survey. The study used a cross-sectional quantitative design involving a community-based household survey method to sample 792 respondents through multi-stage cluster sampling. The chi-square test examined the relationship between sociodemographic, social capital variables and reproductive health services. To account for potential confounding factors, a multivariable logistic regression model included variables from the binary logistic regression analysis with a p-value less than 0.05. In general, access to higher social capital was observed among 493 (62.2%). Almost half, 385 (48.6%) of the respondents have ever used at least one of the reproductive services examined in this study. After controlling all other significant predictors, the following social capital variables remained associated with increased utilisation of SRH services: higher trust in neighbourhood (AOR = 1.8; CI = 1.22–2.66), higher trust in people/institutions (AOR = 2.66; CI = 1.82–3.99), higher social cohesion (AOR = 3.35; CI = 2.21–5.08), stronger network (AOR = 7.55; CI = 4.43–12.87).Access to some social capital dimensions is associated with increased use of reproductive health services. However, any intervention such as mentoring including peer support programs, meant to address social capital needs in sexual and reproductive health should consider the efficacy of each social capital dimension and the intervention’s environment.

社会资本（social capital）通常被视为通过社会联结获取的资源，目前在公共卫生领域受到广泛关注。然而，针对社会资本与生殖健康服务之间关联的研究仍较为有限。此外，尽管现有文献已充分记载了与青年群体使用生殖健康服务相关的各类影响因素，但多数研究视角较为局限，未能考量社会资本所发挥的作用。然而，已知青年群体的此类行为会受到社会因素的影响——这类因素往往部分超出个体的掌控范围，究其原因在于青年群体深度嵌入各类社会组织之中。因此，本研究旨在探讨社会资本与青年群体生殖健康服务利用之间的关联。

本研究的研究对象为调查时处于在校与非在校状态的15至24岁青少年及青年成年人。本研究采用横断面定量研究设计，依托社区入户调查方法，通过多阶段整群抽样法招募792名调查对象。本研究采用卡方检验，分析社会人口学、社会资本变量与生殖健康服务之间的关联。为控制潜在混杂因素，本研究构建多变量logistic回归模型，将二元logistic回归分析中P值小于0.05的变量纳入模型。

总体而言，共有493名（占比62.2%）调查对象拥有较高水平的社会资本。近半数调查对象，即385名（占比48.6%），曾使用过本研究涵盖的至少一项生殖健康服务。在控制其他所有显著预测因素后，以下社会资本变量仍与性与生殖健康（Sexual and Reproductive Health, SRH）服务的使用率提升显著相关：对社区的更高信任（调整后优势比[Adjusted Odds Ratio, AOR]=1.8；置信区间[Confidence Interval, CI]=1.22~2.66）、对他人与机构的更高信任（AOR=2.66；CI=1.82~3.99）、更强的社会凝聚力（AOR=3.35；CI=2.21~5.08）以及更紧密的社会网络（AOR=7.55；CI=4.43~12.87）。

部分社会资本维度的获取与生殖健康服务使用率的提升存在关联。然而，任何旨在满足性与生殖健康领域社会资本需求的干预措施（如同伴支持类辅导项目），都应考量各社会资本维度的作用效果以及干预实施的环境适配性。