Table 2

Multivariate regression with continuous Functional Comorbidity Index (FCI) as predictor of change in Western Ontario Rotator Cuff score (r²=0.293858)

Parameter	β estimate	SE	95% Confidence limits	p Value
Intercept	−2184.71	671.45	−3521.75, −847.68	0.002
FCI	617.80	298.52	23.36, 1212.23	0.042
Age (decade)	297.00	105.75	86.43, 507.57	0.006
FCI×age	−10.36	4.77	−19.86, −0.87	0.033
Gender	168.78	119.60	−69.37, 406.94	0.162
Surgical intervention	−476.69	117.22	−710.11, −243.28	<0.01

FCI, Functional Comorbidity Index.