Thirdhand smoke (THS) is defined as the harmful substances in cigarette smoke that are absorbed into objects, people, and surfaces after smoking. This study aimed to determine the level of awareness of pediatricians working in a tertiary healthcare institution about THS exposure. In this cross-sectional study, participants were asked to fill out an information form in which we questioned the participant's age, sex, occupation in the institution, the exposure of pediatric patients to cigarette smoke during daily healthcare, tobacco product use status, smoking status in their home and car, behavior in case of smoking in closed areas where smoking is prohibited, and whether they knew the term of THS. Also, the Turkish version of The Beliefs About Third-Hand Smoke was used. Eighty-one participants, with a mean age of 34.2 ± 7.6 years, were included in the study. Fifty-six (69.1%) participants said they had never used tobacco products. Participants who had never used tobacco products (P = .005), never allowed smoking in their homes (P = .017) and cars (P = .001), had heard the definition of THS before (P = .013), and thought they knew it (P = .005) had higher total scale scores. There was no significant difference between the THS awareness levels of pediatricians who questioned children's exposure to cigarette smoke in their daily practice and those who did not (P = .491). Determining the awareness levels of pediatricians about THS will be an important step in preventing THS exposure in children.

三手烟（THS）被定义为在吸烟后，香烟烟雾中的有害物质吸收进物体、人和表面的残留物。本研究旨在确定在一个三级医疗机构工作的儿科医生对THS暴露的认知水平。在这项横断面研究中，参与者需要填写一份信息表格，在表格中我们询问了参与者的年龄、性别、在机构的工作职位、日常医疗保健过程中儿童患者是否接触过香烟烟雾、烟草制品使用状况、家庭和车内是否有吸烟行为、如果在禁止吸烟的封闭区域有吸烟行为时的行为表现，以及他们是否知道THS这一术语。此外，还使用了《关于三手烟的信念》土耳其语版本问卷。共有81名参与者参与研究，平均年龄为34.2 ± 7.6岁。56（69.1%）名参与者表示他们从未使用过烟草产品。那些从未使用过烟草产品的参与者、在家从不允许吸烟的参与者以及在车内也不允许吸烟的参与者得分更高（P值分别为0.005、0.017和0.001）。另外，曾听说过THS定义的参与者和认为自己了解THS的参与者得分也较高（P值为0.013和0.005）。在日常实践中询问儿童接触香烟烟雾情况的儿科医生与没有这样做的儿科医生之间对THS的认知水平无显著差异（P = 0.491）。确定儿科医生关于THS的认知水平将是预防儿童接触THS的重要一步。