Table 1.

Item wording and observed scores^a

Item numberb	RA patients n = 203	Blood donors n = 293	p valuec RA vs. blood donors
1: Support from friends and family means a lot for my physical activity	2 (1, 3)	2 (1, 2)	p = 0.19
	1.8 (1.4)	1.7 (1.2)
2: Physical activity gives me a sense of well-being and increased energy	4 (3, 4)	4 (3, 4)	p < 0.001
	3.2 (1.0)	3.5 (0.7)
3: I don’t have enough time for physical activity	0 (0, 2)	1 (0, 2)	p < 0.01
	0.9 (1.1)	1.1 (1.1)
4: I experience less pain when I’m physically active	2 (2, 4)	3 (2, 4)	p = 0.25
	2.6 (1.3)	2.7 (1.2)
5: I’m concerned that physical activity will worsen my disease-related ailments	0 (0, 1)	0 (0, 0)	p < 0.001
	0.6 (1.0)	0.2 (0.6)
6: I think physical activity is fun	3 (2, 4)	3 (2, 4)	p = 0.041
	2.8 (1.2)	3.1 (0.9)
7: My body limits how physically active I can be	2 (1, 4)	1 (0, 2)	p < 0.001
	2.3 (1.3)	0.9 (1.1)
8: Participating in physical activity contributes to my having nice social interactions	2 (2, 4)	2 (2, 3)	p = 0.14
	2.6 (1.3)	2.4 (1.2)
9: I’m too tired and worn out to be physically active	1 (0, 2)	0 (0, 1)	p < 0.001
	1.2 (1.1)	0.6 (0.8)
10: I become less stressed and/or sleep better if I’m physically active	3 (2, 4)	4 (3, 4)	p < 0.001
	2.9 (1.1)	3.3 (0.9)
11: I need clear advice on how to train to be physically active	1 (0, 2)	1 (0, 2)	p < 0.01
	1.2 (1.3)	0.9 (1.1)
12: Few available activities and/or long travel time limits how physically active I can be	0 (0, 0)	0 (0, 0)	p = 0.72
	0.5 (1.1)	0.4 (0.8)
13: Being physically active gives me a feeling of independence and/or control	2 (2, 3)	3 (2, 3)	p = 0.047
	2.4 (1.2)	2.6 (1.1)
14: Physical activity means a lot for preventing further health problems	3 (2, 4)	3 (2, 4)	p < 0.01
	3.1 (1.0)	2.8 (1.2)

^aUpper line gives median (25th and 75th percentile), lower line (italics) gives mean (SD)

^bFacilitators: items 2, 4, 6, 8, 10, 13, 14; barriers: items 1, 3, 5, 7, 9, 11, 12

^c Mann–Whitney U test