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Table 4
Median scores, interquartile range for secondary outcome variables
		Week

		0	6	12	18	24	6-24

Arthritis self-efficacy measures
Pain	25^th	45.00	53.50	58.50	60.50	70.00	z	2.64
	Median	55.00	69.00^a	72.00	71.00	80.00^d	P	0.01
	75^th	72.00	75.50	86.00	90.00	91.50	r	0.35

Function	25^th	58.89	68.61	72.50	74.17	73.61	z	1.91
	Median	74.44	79.44	86.67	88.33	88.89	P	0.06
	75^th	89.44	89.72	94.72	92.22	94.17	r	0.26

Other symptoms	25^th	43.75	57.08	70.42	73.33	78.75	z	-2.96
	Median	61.67	68.33^a	78.33^b	83.33	85.83^d	P	<0.001
	75^th	80.00	86.25	87.92	89.58	90.00	r	0.40

Correlates of physical activity measures
Self-regulation	25^th	23.25	19.50	34.00	33.38	30.75	z	3.69
	Median	30.00	27.00	38.00^b	39.00	39.00	P	<0.001
	75^th	34.00	36.50	45.00	48.25	47.25	r	0.49

Self-efficacy	25^th	2.40	2.40	2.65	2.80	2.45	z	1.79
	Median	2.80	3.00	3.10^b	3.20	3.30	P	0.07
	75^th	3.20	3.35	3.55	3.60	3.75	r	0.24

Benefits	25^th	53.00	53.25	54.25	53.00	53.00	z	-0.69
	Median	56.00	56.00	57.00	56.00	54.50	P	0.49
	75^th	62.50	63.00	65.00	64.00	64.25	r	0.09

Barriers	25^th	0.87	0.78	0.62	0.48	0.48	z	-2.57
	Median	1.48	1.04^a	1.02	0.86	0.98	P	0.01
	75^th	2.03	1.63	1.46	1.55	1.47	r	0.34

Anxiety and depression (Goldberg)	25^th	4.25	1.25	2.00	2.00	1.00	z	-1.73
	Median	6.00	5.00	4.00	5.00	3.00	P	0.08
	75^th	8.75	7.75	5.75	6.00	5.75	r	0.23

Weight (kg)	25^th	69.25	69.88	72.00	69.38	69.00	z	-1.57
	Median	79.50	80.00	81.00^b	79.25^c	79.50^d	P	0.11
	75^th	95.50	97.00	94.00	89.13	91.75	r	0.21

Note. Z scores, P-values and effect sizes (r) for changes between Weeks 6 and 24 are shown in the right hand column. ^aWeek 6 significantly different from Week 0. ^bWeek 12 significantly different from Week 6. ^dWeek 24 significantly different from Week 18. r = Effect size.
Ng et al. Arthritis Research & Therapy 2010 12:R25 doi:10.1186/ar2932

Table 4