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Recent Additions
November, 2003
- To adjust the potential problem of assigning too-high METS to activities of children (ages less than 17), the following list of "Maximum Possible METS" is now used to cap any value that is chosen from the METS-distribution sampling algorithms for any activity in CHAD that is 5 minutes or more in duration.
| Age | Gender | Maximum Possible METS |
| 6 | Female | 6.4 |
| Male | 7.2 |
| 7 | Female | 6.8 |
| Male | 7.7 |
| 8 | Female | 7.3 |
| Male | 8.2 |
| 9 | Female | 7.7 |
| Male | 8.7 |
| 10 | Female | 8.2 |
| Male | 9.2 |
| 11 | Female | 8.7 |
| Male | 9.8 |
| 12 | Female | 9.3 |
| Male | 10.5 |
| 13 | Female | 10.0 |
| Male | 11.1 |
| 14 | Female | 10.6 |
| Male | 11.8 |
| 15 | Female | 11.3 |
| Male | 12.6 |
| 16 | Female | 12.2 |
| Male | 13.4 |
This adjustment was implemented based on an analysis by McCurdy, "Research Note: Analyses to understand relationships among physiological parameters in children and adolescents aged 6-16" (NERL: April 2001), that concludes that METS should be adjusted for ages under 17 because of limits on maximum METS possible for those groups. In addition, there are some gender differences for the same age level, especially for children and adolescents. It is recognized that we are potentially under-estimating activity-specific METS by using these mean limits. Although the limits were done on analyses of kids 6-16, there exist asymptotes at both edges of the age range, so the 6 year old (mean) maximums are also used for children less than 6 years old.
September, 2002
- Three new criteria for removing CHADIDs from the database were established - Age missing; Gender missing and Age greater than 11; and Location missing for greater than 239 minutes regardless of whether activity information was available or not. Applying these criteria resulted in the removal of 252 CHADIDs.
- The Note regarding records in CHAD with a blank Age and the View only blank Age records checkbox were removed on the
Questionnaire Query page to reflect the removal of all CHADIDs that had Age missing.
May, 2002
- In response to an initiative to standardize the look and feel of EPA's Web sites, CHAD has been redesigned. This change does not affect CHAD's functional capabilities.
- The Questionnaire Query features a new download function which captures the query results, dynamically creates a comma-separated file, and compresses the file for ease of download.
February, 2001
- New Baltimore information has been added to CHAD and may be viewed through the Questionnaire Query or through Microsoft Access using the source data available on the Download page.
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