Clinical, socio-demographic and radiological predictors of short-term outcome in rotator cuff disease

Table 3 Multivariate linear regression model.

	R²	B	95% CI	p-value
Step 1	0.401			<0.001
Age, years		-0.4	-0.8 to -0.1	0.024
Gender male		14.2	6.4 to 22.6	0.001
Baseline SPADI score		0.4	0.2 to 0.7	0.001
Treatment group, local injection		-4.8	-12.7 to 2.5	0.186
Regular pain medication		9.1	1.0 to 17.7	0.029
Total abduction at baseline		-0.1	-0.3 to -0.0	0.031
Previous episodes of shoulder pain		8.8	0.3 to 17.0	0.042
On sick leave		10.3	1.2 to 19.5	0.027
Step 2	0.427			0.68
Rotator cuff, normal vs.
Tendinopathy		3.9	-7.2 to 14.9	0.49
Partial thickness tears		-2.9	-15.3 to 9.5	0.29
Full-thickness tears		-8.8	-25.1 to 7.5	0.53
Calcification		-3.2	-13.4 to 7.0	0.53
Bursal effusion		1.5	-7.8 to 10.7	0.76
Bursal thickening		-3.9	-14.0 to 6.1	0.44

Total SPADI score at six weeks after corticosteroid injection treatment as dependent variable and associated baseline predictors after stepwise backward selection. Model 2 illustrates the additional predictive ability of including variables from routine radiology examination.

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