INTRODUCTION Tobacco smoking among tuberculosis (TB) patients leads to poorer treatment outcomes. Smoking cessation support should be integrated into routine TB care. We measured healthcare providers' fidelity to a smoking cessation intervention integrated into routine TB care, in Bangladesh and Pakistan. We aimed to understand the role of providers and settings in the implementation of behavior support (BS) messages for TB and smoking cessation. METHODS The integrated BS intervention was implemented in TB clinics (24 public and 1 private). Cross-sectional data were collected on the fidelity of delivery of the BS intervention using a predefined fidelity index based on an existing validated method of measuring intervention fidelity. Audio-recordings of patient-provider BS sessions were coded using the fidelity index. Intervention fidelity was presented as the proportion of sessions that implemented BS messages. RESULTS A total of 96 sessions were conducted, 37 in Bangladesh and 59 in Pakistan. In public settings, TB medication advice was offered in 91.9% (95% CI: 78.7- 97.2) of sessions in Bangladesh, and in 75.5% (95% CI: 62.4-85.1) of sessions in Pakistan; whilst it was offered in 83.3% (95% CI: 43.7-97.0) of sessions in the private setting in Pakistan. Patients' smoking status was assessed in 70.3% (95% CI: 54.2-82.5) of sessions in Bangladesh, and in 34.0% (95% CI: 22.7-47.4) of sessions in the public setting and in 66.7% (95% CI: 30.0-90.3) of sessions in the private setting in Pakistan. A quit date was set in 32.4% (95% CI: 19.6-48.5) of all sessions in Bangladesh, and in 33.3% (95% CI: 9.6-70.0) of all sessions in the public setting in Pakistan. CONCLUSIONS Fidelity to the intended delivery of the intervention was found to be high for TB-related messages but not for smoking cessation messages. Clinic contexts may play a mediating role in health workers' opportunities to deliver the intervention as planned. TRIAL REGISTRATION International Standard Randomized Clinical Trial Number (ISRCTN43811467). Registered 23 March 2016, https://doi.org/10.1186/ISRCTN43811467.

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衡量在巴基斯坦和孟加拉国纳入常规肺结核护理的新戒烟干预措施的保真度：情境差异和机遇。

简介结核病（TB）患者中吸烟会导致较差的治疗结果。戒烟支持应纳入常规结核病治疗中。我们在孟加拉国和巴基斯坦评估了医疗服务提供者对戒烟干预措施的忠诚度，该干预措施已被纳入到常规结核病护理中。我们旨在了解提供者和设置在实施针对结核和戒烟的行为支持（BS）消息中的作用。方法在TB诊所（24家公共诊所和1家私人诊所）实施了BS综合干预。基于预定义的保真度指标，基于现有的有效的测量干预保真度的方法，收集有关BS干预交付的保真度的横截面数据。使用保真度索引对患者提供者BS会话的音频记录进行编码。干预保真度表示为实现BS消息的会话所占的比例。结果总共进行了96届会议，其中孟加拉国举行了37场，巴基斯坦举行了59场。在公共场合，在孟加拉国的会议中有91.9％（95％CI：78.7-97.2）提供了结核病用药建议，在巴基斯坦的会议中有75.5％（95％CI：62.4-85.1）提供了结核病用药建议。而在巴基斯坦的私人场合中，有83.3％（95％CI：43.7-97.0）的课程提供。在孟加拉国，有70.3％（95％CI：54.2-82.5）的会议评估了患者的吸烟状况，在公共场合中有34.0％（95％CI：22.7-47.4）的会议评估了吸烟率，有66.7％（95％CI） ：30.0-90.3）在巴基斯坦的私人环境中进行。孟加拉国所有会议的退出日期设定为所有会议的32.4％（95％CI：19.6-48.5），巴基斯坦公共场合所有会议的退出日期为33.3％（95％CI：9.6-70.0）。结论发现，对于结核相关信息，对干预措施的预期交付具有很高的忠诚度，但对于戒烟信息而言，其忠诚度却很高。在医护人员按计划进行干预的机会中，临床环境可能起到中介作用。试用注册国际标准随机临床试验编号（ISRCTN43811467）。2016年3月23日注册，https：//doi.org/10.1186/ISRCTN43811467。