Agència de Salut Pública de Barcelona, Servei d'Avaluació i Mètodes d'Intervenció, Barcelona, Spain; CIBER de Epidemiología y Salud Pública, Madrid, Spain; Universitat Pompeu Fabra (UPF), Department of Experimental and Health Science, Barcelona, Spain.
Agència de Salut Pública de Barcelona, Servei d'Avaluació i Mètodes d'Intervenció, Barcelona, Spain; CIBER de Epidemiología y Salud Pública, Madrid, Spain; Institut d'investigació Biomèdica Sant Pau (IIB St. Pau), Barcelona, Spain.
Environ Res. 2018 Jul;164:340-345. doi: 10.1016/j.envres.2018.03.014. Epub 2018 Mar 20.
Questionnaires are widely used to assess secondhand smoke (SHS) exposure. However, the validity of self-reported SHS exposure indicators has been rarely assessed. We aimed to assess correlations, sensitivity, specificity, and predictive values between self-reported SHS exposure indicators and airborne nicotine concentrations.
We performed a cross-sectional study with a convenience sample of 175 homes in Barcelona and Santiago de Compostela, Spain. Airborne nicotine samples were collected from participants' homes and a self-administered questionnaire was completed on SHS exposure in the home. Spearman correlations coefficients and sensitivity, specificity and predictive values were assessed between self-reported SHS exposure indicators and nicotine concentrations in the home.
All self-reported SHS exposure indicators correlated moderately strongly with airborne nicotine concentrations (Spearman correlations coefficient ranging from 0.58 to 0.65). Moreover, sensitivities and negative predictive values between self-reported indicators and the presence of nicotine in the home were below 66.4% while specificities and positive predictive values were over 78.4%. The "number of people usually smoking in the home" showed the best results (r = 0.65, p < 0.001; sensitivity = 50.4%, specificity = 95.2%, PPV = 95.0, NPV = 51.3).
The self-reported SHS indicators assessed in this study showed moderate and strong correlations, low sensitivities, and high specificities. Among them, the best results were obtained with the "number of people usually smoking in the home".
调查问卷被广泛用于评估二手烟（SHS）暴露情况。然而，自我报告的 SHS 暴露指标的有效性很少被评估。我们旨在评估自我报告的 SHS 暴露指标与空气中尼古丁浓度之间的相关性、灵敏度、特异性和预测值。
我们在西班牙巴塞罗那和圣地亚哥-德孔波斯特拉进行了一项横断面研究，使用方便样本纳入了 175 户家庭。从参与者家中采集空气中的尼古丁样本，并完成一份关于家中 SHS 暴露情况的自我管理问卷。评估了自我报告的 SHS 暴露指标与家中尼古丁浓度之间的 Spearman 相关系数以及灵敏度、特异性和预测值。
所有自我报告的 SHS 暴露指标与空气中的尼古丁浓度均呈中度至强相关（Spearman 相关系数范围为 0.58 至 0.65）。此外，自我报告指标与家中存在尼古丁之间的灵敏度和阴性预测值均低于 66.4%，而特异性和阳性预测值均高于 78.4%。“家中通常吸烟的人数”表现出最佳结果（r = 0.65，p<0.001；灵敏度为 50.4%，特异性为 95.2%，PPV = 95.0，NPV = 51.3）。
本研究评估的自我报告的 SHS 指标显示出中等至强的相关性、低灵敏度和高特异性。其中，“家中通常吸烟的人数”的结果最佳。
