Source: July/August 2009 issue of AARP magazine.
Findings: 40,000 men followed for 32 years. During that time swimmers had a 50% lower death rate than all others. Conclusion: Keep swimming!!
Parents
Former Member
Can't find the original article in PubMed (very odd since it is a 2008 study) but I would have to ask if they measured the exposure (activity) only one time or several times over the analysis period. Someone may have been measured in 1982 and said yes I am a runner, swimmer, etc and may have quit the activity the next year yet infer that activity is related to outcome (mortality). This would be misclassification bias which usually underestimates the outcome. Can't make conclusions without seeing all the methods for analysis.
Can't find the original article in PubMed (very odd since it is a 2008 study) but I would have to ask if they measured the exposure (activity) only one time or several times over the analysis period. Someone may have been measured in 1982 and said yes I am a runner, swimmer, etc and may have quit the activity the next year yet infer that activity is related to outcome (mortality). This would be misclassification bias which usually underestimates the outcome. Can't make conclusions without seeing all the methods for analysis.
