Is absolute amount or change in exercise more associated with quality of life in adult cancer survivors?
BACKGROUND
The present study examined the association between quality of life (QOL) in adult cancer survivors and the (a) absolute current amount of exercise and (b) change in exercise since cancer diagnosis.


METHODS
Three hundred fifty-two (mean age = 59.6) adult cancer survivors recruited from outpatient clinics in four states (Iowa, Wisconsin, Minnesota, and Georgia) and a minority support groups completed a survey including demographic, medical, exercise behavior, and QOL questions.


RESULTS
Hierarchical multiple regression analyses controlling for important demographic and medical variables showed that adult cancer survivors who currently exercised three times per week had significantly higher QOL than those who did not (beta = 0.13, P < 0.05). Furthermore, compared to adult cancer survivors who exercised less since their cancer diagnosis, those who maintained (beta = 0.28, P < 0.08) or increased (beta = 0.24, P < 0.01) the amount of exercise they performed since their cancer diagnosis had significantly higher QOL. Finally, examination of the DeltaR(2)(adjusted) between the two exercise models showed that the absolute current amount of exercise explained an additional 1% (DeltaR(2)(adjusted) = 0.01 P < 0.05) of the variance in QOL whereas the change in exercise explained an additional 7% (DeltaR(2)(adjusted) = 0.07, P < 0.01).


CONCLUSIONS
Change in exercise since cancer diagnosis may be a more important correlate of QOL in adult cancer survivors than the absolute current amount of exercise.
Blanchard
Chris M
CM
University of Ottawa, K1N 6N5 Ottawa, Ontario, Canada. chblanch@uottawa.ca
Baker
Frank
F
Denniston
Maxine M
MM
Courneya
Kerry S
KS
Hann
Danette M
DM
Gesme
Dean H
DH
Reding
Douglas
D
Flynn
Thomas
T
Kennedy
John S
JS
D000328:Adult; D001741:Black or African American / Q000523:psychology; D000704:Analysis of Variance; D015444:Exercise / Q000523:psychology*; D005081:Exercise Therapy / Q000379:methods*; D005260:Female; D005845:Georgia; D015438:Health Behavior; D006304:Health Status; D006801:Humans; D007484:Iowa; D008019:Life Style; D008297:Male; D008875:Middle Aged; D008910:Minnesota; D009369:Neoplasms / Q000175:diagnosis / Q000523:psychology* / Q000628:therapy; D011788:Quality of Life; D012044:Regression Analysis; D015983:Selection Bias; D012657:Self-Help Groups; D011795:Surveys and Questionnaires; D017741:Survivors / Q000523:psychology*; D044465:White People / Q000523:psychology; D014922:Wisconsin