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. Author manuscript; available in PMC: 2008 May 12.
Published in final edited form as: J Gerontol A Biol Sci Med Sci. 2007 Nov;62(11):1237–1243. doi: 10.1093/gerona/62.11.1237

Table 2.

Transition rates and standard errors for 400 meter walk and 4 meter walk outcomes: estimates from log-linear models applied to participants enrolled in the successful aging and physical activity interventions*

Successful Aging
Outcome and Transition Transition Rates (SE)
Between 0 and 6 Months Between 6 and 12 Months
400 meter walk
 Success to failure 6.9% (1.9%) 7.9 (2.1%)
 Failure to success -- 33.3% (13.4%)

4 meter walk
 Success to failure 4.7% (1.5%) 2.3% (1.2%)
 Failure to success -- 66.7% (16.0%)

Physical Activity Intervention

Outcome and Transition Transition Rates (SE)
Between 0 and 6 Months Between 6 and 12 Months

400 meter walk
 Success to failure 7.8% (1.9%) 3.6% (1.5%)
 Failure to success -- 50.0% (17.4%)

4 meter walk

 Success to failure 2.6% (1.1%) 3.3% (1.3%)
 Failure to success -- 40.0% (22.0%)
*

During the first year of follow-up, 20 of the 213 participants assigned to the physical activity intervention and 24 of the 211 assigned to the successful aging intervention were unable to complete the 400 meter walk at the 6- and/or 12-month assessment. Of participants who were successful at completing a 4 meter walk at baseline, 11 of the 206 who were assigned to the physical activity intervention and 13 of the 202 assigned to successful aging were unable to complete the 4 meter walk at the 6- and/or 12-month examination.