. Author manuscript; available in PMC: 2019 Mar 15.

Published in final edited form as: Cancer. 2018 Feb 8;124(6):1279–1287. doi: 10.1002/cncr.31238

TABLE 2.

Continuous and Categorical Longitudinal Associations Among Perceived Fatigability, Endurance Walk Performance, and Cancer History Stratified by Age^a

Continuous Measures^c	Regression Coefficient (95% CI)

	Age ≤65 Years	Age >65 Years
Perceived fatigability: RPE, continuous
Cancer	0.37 (−0.14, 0.88)	1.26 (0.95–1.59)^b
No cancer	Ref	0.98 (0.76–1.19)^b
Endurance walking performance: Seconds, continuous
Cancer	10.1 (−0.52, 20.7)	42.3 (35.1–49.5)^b
No cancer	Ref	23.3 (18.9–27.7)

Categorical Measures^c	Odds Ratio (95% CI)

	Age ≤65 Years	Age >65 Years

Perceived fatigability: RPE >10
Cancer	1.73 (0.95–2.56)	3.8 (2.6–14.4)^b
No cancer	Ref	2.9 (2.2–9.3)^b
Poor endurance walk performance: Time >5 min or inability to complete
Cancer	1.71 (0.96–3.05)	8.6 (6.1–12.2)^b
No cancer	Ref	4.6 (3.6–6.0)^b

Abbreviations: CI, confidence interval; OR, odds ratio; Ref, reference category; RPE, the Borg rating of perceived exertion.

Analyses were adjusted for sex, race, body mass index, and the number of comorbidities.

P <.001.

Regression coefficients and odds ratios comparing participants who had ever been diagnosed with cancer compared to those without a history of cancer stratified by age. In total, 850 participants were evaluable for the perceived fatigability analysis and 965 were evaluable for the endurance walk performance test.