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Table 1 Measures of shoulder health and general health from billing data for shoulder osteoarthritis patients by physician specialty (N = 572)

From: A comparison of one-year treatment utilization for shoulder osteoarthritis patients initiating care with non-orthopaedic physicians and orthopaedic specialists

Patient Characteristics   Total Study
Sample (N = 572)
Non-Orthopaedic Physician
(N = 98)
Orthopaedic Specialist
(N = 474)
Age Mean 60.3 61.5 60.1
(95% CI) (59.2, 61.4) (58.9, 64.1) (58.9, 61.3)
Male Sex n (%) 302 (52.8) 44 (44.9) 258 (54.4)
(95% CI) (48.6, 56.9) (34.8, 55.3) (49.8, 59.0)
Insurance type
 Public n (%) 307 (53.7) 45 (45.9) 262 (55.3)
(95% CI) (49.5, 57.8) (35.8, 56.3) (50.7, 59.8)
 Private n (%) 219 (38.3) 48 (48.9) 171 (36.1)
(95% CI) (34.3, 42.4) (38.7, 59.3) (31.7, 40.6)
 Worker’s compensation n (%) 35 (6.1) 2 (2.0) 33 (7.0)
(95% CI) (4.3, 8.4) (0.2, 7.2) (4.8, 9.6)
 Other n (%) 11 (1.9) 3 (3.1) 8 (1.7)
(95% CI) (0.9, 3.4) (0.6, 8.7) (0.7, 3.3)
Concurrent Shoulder Diagnosesa
 Rotator Cuff Tear n (%) 173 (30.2) 16 (16.3) 157 (33.1)
(95% CI) (26.5, 34.2) (9.6, 25.2) (28.9, 37.6)
 Rheumatoid Arthritis n (%) 7 (1.2) 7 (7.1) 0 (0.0)
(95% CI) (0.6, 2.7 (2.9, 14.2) (0.0, 1.2)
 Humerus Fracture n (%) 6 (1.0) 0 (0.0) 6 (1.3)
(95% CI) (0.4, 2.3) (0.0, 3.7) (0.5, 2.7)
 Instability n (%) 9 (1.6) 0 (0.0) 9 (1.9)
(95% CI) (0.7, 3.0) (0.0, 3.7) (0.9, 3.6)
 Adhesive capsulitis n (%) 19 (3.3) 1 (1.0) 18 (3.8)
(95% CI) (2.0, 5.1) (0.03, 5.5) (2.2, 5.9)
Charlson Comorbidity Indexb
 Score 0 n (%) 223 (69.0) 55 (68.0) 168 (69.4)
(95% CI) (63.7, 74.0) (56.6, 77.8) (63.2, 75.2)
 Score 1 n (%) 54 (16.7) 15 (18.5) 39 (16.1)
(95% CI) (12.8, 21.2) (10.7, 28.7) (11.7, 21.4)
 Score 2 n (%) 38 (11.8) 7 (8.6) 31 (12.8)
(95% CI) (8.5, 15.8) (3.5, 17.0) (8.9, 17.7)
 Score 3 n (%) 4 (1.2) 2 (2.5) 2 (0.8)
(95% CI) (0.3, 3.1) (0.3, 8.6) (0.1, 2.9)
 Score 4 n (%) 2 (0.6) 1 (1.2) 1 (0.4)
(95% CI) (0.08, 2.2) (0.03, 6.7) (0.01, 2.3)
Healthcare utilization in the 365 days prior to index shoulder visit
 Patients who visited a NOP n (%) 221 (38.6) 70 (71.4) 151 (31.9)
(95% CI) (34.6, 42.7) (61.4, 80.1) (27.7, 36.3)
 Number of visits to NOPc Mean 4.1 4.3 4.0
(95% CI) (3.6, 4.7) (3.6, 5.0) (3.3, 4.8)
 Patients who visited an OS n (%) 88 (15.4) 18 (18.4) 70 (14.8)
(95% CI) (12.5, 18.6) (11.3, 27.5) (11.7, 18.3)
 Number of visits to OSd Mean 2.2 2.1 2.3
(95% CI) (1.9, 2.6) (1.5, 2.7) (1.9, 2.7)
  1. aAmong all OA patients
  2. bAmong patients with healthcare utilization in previous 365 days
  3. cAmong patients having one or more visit with non-orthopaedic physician
  4. dAmong patients having one or more visit with an orthopaedic specialist