从1905年到1975年,新泽西州哈得生县3家重点铬工厂产生了将近200000万kg铬酸盐生产废料,因而许多人在铬污染环境中工作和生活。血和尿铬曾被用来监测工业环境中铬接触量。但常规生物监测,可能不适用检测低水平和间断的环境铬接触,加上食物、运动、吸烟等可影响铬的本底值水平。因此,评定环境中低水平铬接触情况时,应首先排除混杂因素。本文对评价铬接触的混杂变量进行了研究。研究对象共53人,其中男46人、女7人,年龄42±14岁。17人在铬污染区附近工作,36人在哈得生县外的州公园工作。两组血和尿铬水平无差异,故合在一起研究。全部对象先填调查表,回答饮食、吸烟、健康水平、医疗史、各种嗜好、既往职业等问题。收集上述各 From 1905 to 1975, three key chromium plants in Hudson County, New Jersey, generated nearly 2 million kilograms of chromate production waste and many were working and living in chrome-contaminated environments. Blood and urine chromium have been used to monitor chromium exposure in industrial settings. However, routine biological monitoring may not be applicable to detect low and intermittent environmental chromium exposure, and food, exercise, smoking, etc. may affect the background level of chromium. Therefore, when assessing low-level exposure to chromium in the environment, confounding factors should first be excluded. This paper studies the variables that affect the assessment of chromium exposure. A total of 53 subjects, including 46 males and 7 females, aged 42 ± 14 years. 17 people work near chrome-contaminated areas and 36 people work in state parks outside Hardduck County. There was no difference between the two groups in blood and urine chromium levels, so together study. All objects fill in the questionnaire to answer questions such as diet, smoking, health level, medical history, various hobbies, previous occupations and so on. Collect the above each