Effect of a low-intensity, self-management lifestyle intervention on knee pain in community-based young to middle-aged rural women: a cluster randomised controlled trial

Table 3 Effect of intervention on change in knee pain over 1 year in women with baseline BMI ≥ 25 kg/m²

	Intervention, n (%)	Control, n (%)	P value^a	Odds ratio (95% CI)^b	P value^b
Women who were overweight or obese, n = 242	n = 137	n = 105
Knee pain worsening	19 (13.9)	27 (25.7)	0.02	0.45 (0.23, 0.87)	0.02
Subgroup with no knee pain at baseline, n = 147	n = 85	n = 62
Incidence of knee pain	13 (15.3)	13 (21.0)	0.37	0.68 (0.29, 1.62)	0.39
Subgroup with knee pain at baseline, n = 95	n = 52	n = 43
Knee pain increasing	6 (11.5)	14 (32.6)	0.01	0.28 (0.09, 0.87)	0.03
Knee pain improvement	36 (69.2)	23 (53.5)	0.12	2.16 (0.87, 5.32)	0.10

^aDifferences between intervention and control groups using chi squared test
^bLogistic regression, intervention vs control group, adjusted for age, body mass index, town cluster, and baseline WOMAC pain score

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