Evaluation of a collaborative ambulatory orthopedic care program for patients with hip and knee osteoarthritis: a comparative observational cohort study

Table 2 Baseline characteristics/confounders for study population

Baseline characteristics	Usual care N = 1,128	Collaborative care N = 23,042	p-value^a
age (mean [SD])	71.7 [11.4]	68.9 [11.2]	< 0.001
sex (female)	66.0%	66.3%	0.841
level of care	6.9%	3.6%	< 0.001
CCI (mean [SD])	1.6 [1.9]	2.2 [2.2]	< 0.001
participation in disease-management programme for type 2 diabetes	16.0%	24.4%	< 0.001
cardiovascular comorbidities	77.2%	76.7%	0.669
type 2 diabetes	27.2%	29.5%	0.099
stroke and other cerebrovascular diseases	2.2%	2.8%	0.214
malignoma	14.6%	16.0%	0.234
obesity	27.9%	28.9%	0.467
depression	21.9%	34.3%	< 0.001
smoking	3.9%	4.8%	0.164
psychosocial risk factors	2.0%	1.4%	0.109
burn-out	5.7%	5.5%	0.850
somatoform disorders	14.3%	21.3%	< 0.001
MDPTO score (mean [SD])^b	3.7 [1.8]	4.1 [1.8]	< 0.001

^at-test for count and continuous variables, chi-square-test for binary variables
^bMDPTO score: The musculoskeletal-disorder-prior to observation (MDPTO)-score is a non-standardized score we developed and used in the model to approximate level of musculoskeletal disease prior to the observation period. The score takes into account the following factors during the pre-observation period: hospitalisation related to musculoskeletal disorders, diagnosis of musculoskeletal disease, sickness certificate for musculoskeletal disorders, prescription of physical therapy or aids and appliances and prescription of opioids

ISSN: 1471-2474