Ozoh Obianuju B, Dania Michelle G, Irusen Elvis M
Department of Medicine, College of Medicine, University of Lagos , Nigeria.
Division of Pulmonology, University of Stellenbosch , Cape Town, South Africa.
J Public Health Afr. 2014 May 29;5(1):316. doi: 10.4081/jphia.2014.316. eCollection 2014 Feb 4.
The validity of self-reported smoking is questionable because smokers are inclined to deny smoking. We aimed to determine the prevalence of self-reported smoking among intra-city commercial drivers in Lagos, and assess its validity based on urinary cotinine assessment. This study was conducted at three major motor parks in Lagos, Nigeria. Information on smoking status and habits was obtained from 500 consecutive male drivers using a structured questionnaire during a face-to-face interview. Eighty-one self-reported smokers and non-smokers were selected by systematic random sampling for urinary cotinine assessment using cotinine strips. The prevalence of self-reported smoking was compared to the prevalence of smoking based on urinary cotinine and the specificity and positive predictive values of self-reported smoking was determined. Prevalence of self-reported current smoking was 32% and 17.9% of non-smokers were passive smokers. Among 81 drivers in whom urinary cotinine assessment was performed, the prevalence of smoking based on self-report was 34 (42%) compared to 41 (50.6%) when based on urinary cotinine, (X=38.56, P<0.001). The rate of misclassification among self-reported non-smokers as smokers was 21.3% and misclassification rate for self-reported smokers as non-smokers was 8.8%. The sensitivity of self-reported smoking in accurately classifying smoking status was 91.2% and the specificity was 78.7%. The prevalence of self-reported cigarette smoking among commercial drivers in Lagos is high and a significant proportion of self-reported non-smokers are passive smokers. Self-reported smoking status obtained during face-to-face interview appears unreliable in obtaining accurate smoking data in our locality.
自我报告的吸烟情况的有效性存疑，因为吸烟者往往倾向于否认吸烟。我们旨在确定拉各斯市内商业司机中自我报告的吸烟率，并基于尿可替宁评估来评估其有效性。本研究在尼日利亚拉各斯的三个主要汽车停车场进行。通过面对面访谈，使用结构化问卷从500名连续的男性司机那里获取了吸烟状况和习惯的信息。通过系统随机抽样从自我报告的吸烟者和非吸烟者中选取了81人，使用可替宁试纸进行尿可替宁评估。将自我报告的吸烟率与基于尿可替宁的吸烟率进行比较，并确定自我报告吸烟的特异性和阳性预测值。自我报告的当前吸烟率为32%，17.9%的非吸烟者为被动吸烟者。在进行尿可替宁评估的81名司机中，基于自我报告的吸烟率为34人（42%），而基于尿可替宁的吸烟率为41人（50.6%），（X=38.56，P<0.001）。自我报告的非吸烟者被误分类为吸烟者的比例为21.3%，自我报告的吸烟者被误分类为非吸烟者的比例为8.8%。自我报告吸烟在准确分类吸烟状况方面的敏感性为91.2%，特异性为78.7%。拉各斯商业司机中自我报告吸烟的比例很高，且很大一部分自我报告的非吸烟者是被动吸烟者。在我们当地，通过面对面访谈获得的自我报告吸烟状况在获取准确吸烟数据方面似乎不可靠。
