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PubMed1988

Comparison of death certificate occupation and industry data with lifetime occupational histories obtained by interview: variations in the accuracy of death certificate entries.

This study compares usual and recent occupation and industry data from lifetime work histories obtained by interview with death certificate entries for occupation and industry for 2,435 persons diagnosed with cancer. Match rates are calculated as the percent of death certificate occupation and industry entries that were confirmed by interview data and are compared for exact 3-digit 1980 U.S. Census Bureau occupation and industry codes and for groups of these codes. The overall match rate for individual usual occupation codes was 47.9% and for exact usual industry codes it was 61.8%. Significant differences between the interview data for usual occupation or industry and the death certificate entry were observed by race and gender, marital status, number of years worked, and occupation and industry groups and by age for industry. Misclassification or overreporting of occupation and industry data on the death certificate ranged from 30 to 50% in this study. Our results suggest that the utility of death certificate data for investigations into the occupational risk factors for cancer may be quite limited.

Adult↗
PubMed1993

Liver cirrhosis deaths within occupations and industries in the California occupational mortality study.

Mortality rates were drawn from the California Occupational Mortality Study (COMS) to analyze liver cirrhosis deaths within occupations and industries from 1979 to 1981. Age-adjusted Standardized Mortality Rates (SMRs) were made available by the State of California for separate analyses of women, men, blacks and whites. Rankings of occupations with narrow confidence intervals were strikingly similar for blacks and whites. Within occupations, the highest female SMRs were for waitresses, telephone operators, cosmetologists, dress makers, hospital orderlies, textile workers, and laborers. The lowest female SMRs were for skilled crafts workers and teachers. High male occupations included water transportation workers, bartenders, loggers, laborers, roofers, construction workers, farm workers, iron workers, and painters. Low male occupations included teachers, physicians and dentists, managers, factory supervisors, business sales workers, heavy equipment operators, and other professionals. High female industries included eating and drinking places, laundry/dry cleaning, nursing and personal care facilities, aerospace, beauty shops, and entertainment. Low female industries included wholesale trades and education. High male industries included water transportation, military, guard services, eating and drinking places, iron and steel mills, and railroads. Low male industries included research/engineering labs, education, and computer manufacturing. This study was descriptive. It remains unknown whether certain jobs cause excessive drinking and cirrhosis, or whether people who are prone to develop cirrhosis select certain jobs.

Adolescent↗
PubMed1999

Accuracy of industry and occupation on death certificates of electric utility workers: implications for epidemiologic studies of magnetic fields and cancer.

A substantial epidemiologic literature has relied on occupation and industry information from death certificates to make inferences about the association of electric and magnetic field exposure with cancer, but the validity of the occupational data on death certificates is questionable. We compared occupation and industry information from death certificates to company work histories for 793 electric utility workers who died from brain cancer (n=143), leukemia (n=156), lung cancer (n=246, randomly sampled), and non-cancer causes (n=248, randomly sampled). Nearly 75% of death certificates correctly indicated utility industry employment and of those, 48% matched the longest held occupation derived from company work histories. Hence, only 36% matched on both industry and occupation. We computed odds ratios relating occupations involving magnetic field exposure to brain cancer and leukemia both for the occupation listed on the death certificate and for the longest-held occupation based on company records in order to examine the impact of exposure misclassification based on reliance on the death certificate information. For brain cancer, the odds ratio was 1.2 based on death certificates and 1.7 based on company work history, suggesting some attenuation due to misclassification. For leukemia, death certificate information yielded an odds ratio of 0.9, whereas company work histories yielded an odds ratio of 1.3. Although work histories are limited to the period of employment in a specific company, these data suggest that there is substantial misclassification in use of death certificate information on industry and occupation of utility workers, as found in other industries. The limited quality of occupation and industry information on death certificates argues against relying on such information to evaluate modest associations with mortality.

Adult↗
PubMed1982

Occupational screenings: recruitment from private industry.

Occupational screening involving private sector employees represents a source with relatively high volumes of initial contacts and entries, a low ratio of entries to initial contacts, and a relatively high effort level requirement for the recruitment team. In the CPPT, all centers used this strategy, to provide, overall, 26% of initial contacts, 20% of first protocol visits and 17% of entries. Occupational screening is costly and involves careful planning and implementation of complex arrangements. Procedures for contacting industries and conducting screenings are described. Screening yield was inversely related to company size.

Adult↗
PubMed1980

Cancer in children of parents exposed to hydrocarbon-related industries and occupations.

Recent animal and human studies suggest that prenatal exposure to carcinogens may increase the risk of childhood malignancy. The Texas Childhood Cancer Study (1976-1977) was designed to test the hypothesis that parental exposure to hydrocarbon-related occupations or industries increases this risk. The study subjects, parents of children with and without cancer, were questioned about their job histories. Parents of 296 children with cancer were not exposed to hydrocarbon-related occupations or industries more often than the uncles and aunts of these children, the parents of neighborhood children, or the parents of 283 children without cancer. During the year before birth, odds ratios for fathers of children seen at a hematology clinic with cancer relative to the uncles of these children (0.93), the fathers of neighborhood children (1.33), and the fathers of children seen at the clinic without cancer (0.50) were not statistically significantly different from 1.00 (p greater than 0.05). This lack of association persisted for the year after birth, the year before diagnosis, and the interval from the year before birth to the year of diagnosis; for different diagnoses; for different ages at diagnosis; and for the industries and occupations of female as well as male parents.

Adolescent↗
PubMed1998

Claim rates of compensable back injuries by age, gender, occupation, and industry. Do they relate to return-to-work experience?

STUDY DESIGN: A retrospective cohort study of Michigan workers' compensation cases involving back injuries in 1986 and 1987 with incidence and outcome data. OBJECTIVE: To determine claim rates by age, gender, and industry or occupation for compensable back injuries and to investigate the relation between occupation and return to work. SUMMARY OF BACKGROUND DATA: The cohort of 24,094 Michigan workers' compensation cases from 1986 and 1987 in which claimants were compensated for back injuries was reviewed. Compensation eligibility requires more than 7 days' disability after injury. METHODS: Claim rates for back injuries by age, gender, and industry or occupation using employment data interpolated from 1980 and 1990 Census 1% Public Use Microdata Samples. Cox proportional hazards analysis was performed for return to work in the first 8 weeks after injury, with occupation coded at the three-digit level. RESULTS: All-age claim rates for Michigan compensable back injuries by occupation ranged between 0.03% and 1.7% annually (0.39% for all cases) and were generally higher in women in white collar occupations and in men in blue collar occupations. The claim rate peaked in men in the 25-34 year range, with the highest rates in manual labor occupations. The peak claim rates by age were less marked in women, tending to occur broadly throughout the 25-44-year range. Similar all-age values were recorded by industry. The male-to-female risk ratio over all occupations does not vary by age and is approximately 1.4:1. As the classification of occupation became more detailed, large differences in risk were documented within major occupation groups. The highest risk in this study was approximately 6% annually for 25-44 year old men in driver-sales (beverage truck drivers and delivery workers). Only 7 of 40 occupation categories showed a significant relative hazard for return to work in the first 8 weeks after injury, and these were blue collar occupations with earlier return than the reference sales category. For Michigan compensable back injuries, a rough estimate of the true annual incidence of new claims is 94% of the reported claim rate. CONCLUSIONS: The relative risk of compensable back injury is generally higher for females in white collar occupations, higher for males in blue collar occupations and approximately equal in service occupations. Although the risk of back injury is related to occupation, the same occupational factors do not operate as a barrier to return to work.

Adolescent↗