Educational outreach visits to improve knee osteoarthritis management in primary care

BMC Medical Education

Table 2 Probability that for a case at least one appropriate exercise therapy is prescribed by the GP

		MODEL A		MODEL B
		Odds ratio (95% CI)	P-value	Odds radio (95% CI)	P-value
Group	Intervention Control	1.72 (0.99; 2.99) #	0.0529	1.77 (0.98; 3.19) #	0.0566 .
Casus^α	Casus 2 Casus 1	1.38 (1.03; 1.85) #	0.0370	1.39 (1.03; 1.86) #	0.0308 .
Gender	Male Female			0.76 (0.43; 1.36) #	0.3581 .
Type of practice	Duo practice Group practice Solo practice			0.88 (0.39; 1.96) 0.96 (0.47; 1.97) #	0.7449 0.9050 .

α: group and case act as fixed variables
Model A: Results from an additive multivariable logistic regression model with Generalized Estimating Equations to handle the correlation between the multiple results per GP (2 cases). The result is based on 129 events [= total number of positive prescriptions of appropriate therapy in the intervention (n = 64) and control (n = 65) group] from 354 observations. This model gives the Odds ratio (95% CI) and p-value with no correction for gender and type of practice
Model B: Same statistical model as for Model A. This model gives the Odds ratio (95%CI) and p-value with additional correction for gender and type of practice
# reference category
*Note that the effect of intervention did not depend on the specific casus (p = 0.1970 for the interaction between intervention and casus)

ISSN: 1472-6920