Background: Motor-vehicles crashes are a leading cause of death among children. Age- and size-appropriate restraint use can prevent crash injuries and deaths among children. Strategies to increase child restraint use should be informed by reliable estimates of restraint use practices. Objective: Compare parent/caregiver-reported and observed child restraint use estimates from the FallStyles and Estilos surveys with the National Survey of the Use of Booster Seats (NSUBS). Methods: Estimates of child restraint use from two online, cross-sectional surveys—FallStyles, a survey of U.S. adults, and Estilos, a survey of U.S. Hispanic adults—were compared with observed data collected in NSUBS. Parents/caregivers of children aged ≤ 12 years were asked about the child’s restraint use behaviors in FallStyles and Estilos, while restraint use was observed in NSUBS. Age-appropriate restraint use was defined as rear-facing child safety seat (CSS) use for children aged 0–4 years, forward-facing CSS use for children aged 2–7 years, booster seat use for children aged 5–12 years, and seat belt use for children aged 9–12 years. Age-appropriate restraint users are described by demographic characteristics and seat row, with weighted prevalence and corresponding 95% confidence intervals (CI) calculated. Results: Overall, child restraint use as reported by parents/caregivers was 90.8% (CI: 87.5–94.1) (FallStyles) and 89.4% (CI: 85.5–93.4) for observed use (NSUBS). Among Hispanic children, reported restraint use was 82.6% (CI: 73.9–91.3) (Estilos) and 84.4% (CI: 79.0–88.6) for observed use (NSUBS, Hispanic children only). For age-appropriate restraint use, estimates ranged from 74.3% (CI: 69.7–79.0) (FallStyles) to 59.7% (CI: 55.0–64.4) (NSUBS), and for Hispanic children, from 71.5% (CI: 62.1–81.0) (Estilos) to 57.2% (CI: 51.2–63.2) (NSUBS, Hispanic children only). Conclusion and Practical Application: Overall estimates of parent/caregiver-reported and observed child restraint use were similar. However, for age-appropriate restraint use, reported use was higher than observed use for most age groups.

背景：机动车碰撞是儿童死亡的主要原因。适合年龄和尺寸的约束使用可以防止儿童的碰撞伤害和死亡。增加儿童约束装置使用的策略应以约束装置使用实践的可靠估计为依据。客观的：将 FallStyles 和 Estilos 调查中的家长/看护人报告和观察到的儿童约束装置使用估计值与国家加高座椅使用调查 (NSUBS) 进行比较。方法：将来自两项在线横断面调查——FallStyles，一项针对美国成年人的调查，以及一项针对美国西班牙裔成年人的调查——Estilos 的儿童约束使用估计值与 NSUBS 中收集的观察数据进行比较。在 FallStyles 和 Estilos 中，向 12 岁以下儿童的父母/看护人询问了儿童的约束使用行为，而在 NSUBS 中观察到约束的使用。适合年龄的约束使用定义为 0-4 岁儿童使用后向儿童安全座椅 (CSS)、2-7 岁儿童使用前向 CSS、5-12 岁儿童使用加高座椅、 9-12 岁儿童使用安全带。结果：总体而言，父母/看护人报告的儿童约束装置使用率为 90.8% (CI: 87.5–94.1) (FallStyles) 和 89.4% (CI: 85.5–93.4) 用于观察使用 (NSUBS)。在西班牙裔儿童中，据报告约束使用率为 82.6% (CI: 73.9–91.3) (Estilos) 和 84.4% (CI: 79.0–88.6) 用于观察使用（NSUBS，仅限西班牙裔儿童）。对于适合年龄的约束使用，估计范围从 74.3% (CI: 69.7–79.0) (FallStyles) 到 59.7% (CI: 55.0–64.4) (NSUBS)，对于西班牙裔儿童，从 71.5% (CI: 62.1–81.0) ) (Estilos) 至 57.2% (CI: 51.2–63.2) (NSUBS, 仅限西班牙裔儿童)。结论与实际应用：父母/看护人报告的和观察到的儿童约束装置使用的总体估计是相似的。然而，对于适合年龄的约束使用，报告的使用高于大多数年龄组观察到的使用。