Criterion validation of two submaximal aerobic fitness tests, the self-monitoring Fox-walk test and the Åstrand cycle test in people with rheumatoid arthritis

Table 3 VO _2max values from the measured VO _2max test and the submaximal tests

l/min	Mean (SD)	p-value	r-value¹	p-value
Measured VO_2max	2.4 (0.8)	-	-	-
Fox-walk test	3.2 (0.9)	0.004	0.81	<0.001
Åstrand test corrected for age	2.2 (0.6)	0.039	0.82	<0.001
Åstrand test corrected for maximal HR	2.4 (0.6)	0.956	0.82	<0.001
Fox-Haskell (220-age)	2.2 (0.6)	0.037	0.82	<0.001
Tanaka (208–0.7 · age)	2.3 (0.6)	0.289	0.81	<0.001
Nes (211–0.64 · age)	2.4 (0.7)	0.752	0.81	<0.001
ml · kg ¹ · min ^-1	Mean (SD)	p-value	r-value	p-value
Measured VO_2max	33 (8)	-	-	-
Fox-walk test	44 (2)	<0.001	0.52	0.006
Åstrand test corrected for age	31 (8)	0.064	0.68	<0.001
Åstrand test corrected for maximal HR	34 (8)	0.593	0.65	<0.001
Fox-Haskell (220-age)	31 (8)	0.059	0.68	<0.001
Tanaka (208–0.7 · age)	32 (8)	0.546	0.66	<0.001
Nes (211–0.64 · age)	34 (8)	0.345	0.66	<0.001

Paired t-test comparisons between the measured VO_2max values and the six estimated VO_{2 max} values and Pearson’s correlation coefficient’s between the tests (n = 27).
¹Pearson’s correlation coefficient, VO_2max = maximum oxygen uptake, HR = heart rate.
P≤0.05 in bold.

ISSN: 1471-2474