Kersemaekers W M, Verheijen N, Kromhout H, Roeleveld N, Zielhuis G A
Department of Medical Informatics, Epidemiology and Statistics, University of Nijmegen, The Netherlands.
Occup Environ Med. 1998 Jan;55(1):37-42. doi: 10.1136/oem.55.1.37.
To assess the reliability of a classification scheme and interview questions to be used for retrospective expose assessment in a study on reproductive disorders among hairdressers. Based on the presence of an air cleaning device (yes or no) and setting waves (yes or no), this scheme divides hairdressers into groups with potentially high and low exposure to solvents. The reliability of this and other schemes was assessed. Also; the reliability of self reports on other job characteristics was evaluated.
The monitored hairdressers were interviewed one or two years after measurements were performed. Based on the interview information, hairdressers were classified into exposure groups according to the original and other classification schemes. Measured ethanol concentrations were compared between the classified exposure groups. Furthermore, the interview answers were compared with the registered information one to two years ago.
Using self reports, the original scheme resulted in mean ethanol concentrations (used as indicator variable) of 11.8 and 7.4 mg/m3 for the high and low exposure groups, respectively. The resolution was slightly less than for the original classification based on observations (15.0 and 7.1 mg/m3). Surprisingly, the self reported presence of any ventilation device resulted in more contrast in mean exposure concentration between the groups (17.4 and 7.5 mg/m3, respectively). Hairdressers reported validly on salon characteristics such as the type of salon, the number of hairdressers that worked in the salon, and the presence of ventilation devices, but could not make a distinction between different kinds of ventilation devices. The numbers of customers and tasks performed were largely overreported, but most variables correlated significantly with the information registered during the measurements.
The self reported presence of any ventilation device is most predictive for the level of exposure to ethanol in the hairdressing salon. Questionnaire data on work characteristics should be treated with caution.
在一项关于美发师生殖系统疾病的研究中，评估用于回顾性暴露评估的分类方案和访谈问题的可靠性。该方案根据空气净化设备的有无（是或否）以及是否做定型波浪发（是或否），将美发师分为溶剂暴露潜在高组和低组。评估了该方案及其他方案的可靠性。此外，还评估了关于其他工作特征的自我报告的可靠性。
在测量完成一或两年后，对受监测的美发师进行访谈。根据访谈信息，按照原始分类方案和其他分类方案将美发师分为暴露组。比较分类后的暴露组之间测量的乙醇浓度。此外，将访谈答案与一至两年前登记的信息进行比较。
通过自我报告，原始方案得出高暴露组和低暴露组的平均乙醇浓度（用作指标变量）分别为11.8和7.4毫克/立方米。该分辨率略低于基于观察的原始分类（分别为15.0和7.1毫克/立方米）。令人惊讶的是，自我报告的任何通风设备的存在导致两组之间平均暴露浓度的差异更大（分别为17.4和7.5毫克/立方米）。美发师能有效报告美发沙龙的特征，如沙龙类型、在沙龙工作的美发师数量以及通风设备的存在情况，但无法区分不同类型的通风设备。顾客数量和执行的任务数量大多被高估，但大多数变量与测量期间登记的信息显著相关。
自我报告的任何通风设备的存在最能预测美发沙龙中乙醇的暴露水平。关于工作特征的问卷数据应谨慎对待。
