February 28 — 29, 2008 Advisory Committee Meeting
Review of Agenda and Overview of Subcommittee Process
The chair of the committee, William Haskell, Ph.D., summarized
the work process of the 11 subcommittees and noted they will be providing an
overview of their work during this meeting. Dr. Haskell discussed the challenge
of analyzing the science surrounding physical activity in an evidence-based
paradigm. As such, Dr. Haskell asked the subcommittees to focus not so much on
the levels of evidence but the type of evidence. Dr. Haskell reviewed an
organizational slide in which the committee should categorize types of evidence
Randomized controlled trials (RCT or meta-analyses) without major limitations.
RCTS (or meta-analyses) with important limitations.
Non-randomized clinical trials.
Well designed prospective cohort studies and case-control studies.
Other observational studies. Weak prospective cohort studies or case-control
studies; cross-sectional studies or case series.
Inadequate, very limited, or no data in population of interest. Anecdotal
evidence or no/little clinical experience.
Additionally, Dr. Haskell asked each subcommittee to summarize the major
health outcomes in their areas and note the strength of evidence as follows:
- Strong, consistent (across studies, populations)
- Moderate, reasonably consistent
- Weak, inconsistent (across studies, populations)