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| Changes in Injury and Illness with Days Away From Work Statistics |
| Beginning with the 2003 reference year, two new classification systems and a redesigned confidentiality method were implemented. The 2002 North American Industry Classification System (NAICS) and the 2000 Standard Occupational Classification (SOC) Manual are now used to classify industry and occupation, respectively. Prior to 2003, the survey used the Standard Industry Classification (SIC) system and the Bureau of the Census occupational coding system. Substantial differences between these systems results in breaks in series for both industry and occupation data. Users are advised against making comparisons between the 2003/2004 industry and occupation categories and the results from previous years. |
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