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Exposure to TCDD was based on either self-reports or classification of occupational data.
Variability was found in the sensitivity of classification of occupational data across surveys.
This fact likely reflects the inconsistency of occupational data available in typical hospital records.
Stratification of occupational data into 50 64 years old and 65 years and over age groups did not alter the gender difference (data not shown).
Our study is consistent with other studies suggesting that death certificates may not be an appropriate source of occupational data when information on exposure to specific jobs is essential.
This suggests that while death certificates may not be a suitable source of occupational data where classification into specific job titles is essential, in the absence of other data, it is a reasonable source for constructing measures such as occupational SES that are based on grouped occupational data.
Similar(53)
ONet is a primary source of occupational information providing data on key attributes and characteristics of occupations.
A case control study of paternal occupational data for 2920 cases of neuroblastoma, born and diagnosed in Great Britain between 1962 and 1999 and recorded in the National Registry of Childhood Tumours, and 2920 controls from the general population matched on sex, date of birth and birth registration district.
Thus, using individual-level data has the advantage of added efficiency, relative to an analysis of mean occupational data, which might be more inclined to suffer omitted variable bias.
Even in countries where updated data are available, it may be difficult to establish the size and composition of the health workforce because the collection and dissemination of representative occupational data using the ISCO-88 standard at the three- or four-digit level (or other comparable national classification) remains less widespread.
Women were interviewed in the 12th and 32nd weeks of pregnancy and answered several questionnaires on sociodemographic characteristics, health status, use of drugs, occupational data, environmental exposures, time activity patterns, and a food-frequency questionnaire.
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