One-minute stair climbing, 50-foot walk, and timed up-and-go were responsive measures for patients with chronic low back pain undergoing lumbar fusion surgery

Table 5 Correlations between change scores of physical capacity tasks, Oswestry disability index, and visual analog scale on back pain intensity

	5-min walk	1-min stair-climbing	50-ft walk	Timed up-and-go	ODI	VAS
5-min walk	1.000	0.815^a	− 0.755^a	− 0.586^a	− 0.422^a	− 0.342^a
1-min stair climbing		1.000	−0.755^a	− 0.670^a	− 0.396^a	− 0.342^a
50-ft walk			1.000	0.665^a	0.467^a	0.368^a
Timed up-and-go				1.000	0.413^a	0.286^a
ODI					1.000	0.727^a
VAS						1.000

ODI Oswestry Disability Index 2.0, VAS Visual Analog Scale on back pain intensity
^ap < 0.01

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