Ninety day mortality and its predictors after primary shoulder arthroplasty: an analysis of 4,019 patients from 1976-2008

Table 1 Clinical and socio-demographic characteristics of Study Cohort

	Mean (standard deviation) or % (n)
	3, 480 patients with 4, 019 shoulder arthroplasties (TSA or HHR)
Age in years	65 (13) [median 67, range 18 to 67]
Female/male	2, 250 (56%)/1769 (44%)
Deyo-Charlson index	1.0 (1.8)
Body Mass Index (BMI) ^a	29 (6)
American Society of Anesthesiologist (ASA) ^b
ASA Class I/II	1, 725 (57%)
ASA Class III	1, 281 (43%)
ASA Class IV	15 (1%)
Implant fixation
Cemented	3, 342 (83%)
Uncemented	677 (17%)
Underlying Diagnosis ^c
Rheumatoid arthritis	685 (17%)
Trauma	867 (22%)
Tumor^d	182 (5%)
Osteoarthritis	1, 988 (49%)
Rotator cuff disease	177 (4%)
Other^e	120 (3%)

^a BMI was available from 9/1/1987 to present on 3, 127 shoulders;
^b ASA was available from 11/1/1988 to 2008 on 2, 317 shoulders
^c Except for trauma, all other underlying diagnoses are associated with elective arthroplasty
^dOf the 182 with underlying diagnosis of tumor, 135 (74%) had primary cancer and 47 (26%) had metastatic cancer.
^e Other category for underlying diagnosis includes: avascular necrosis, ankylosing spondylitis, psoriatic arthritis, gout, Charcot arthropathy, dislocation, old injury, prior history of septic arthritis
All numbers rounded to nearest whole number and therefore percents may not add to 100%
TSA, Total Shoulder Arthroplasty; HHR, Humeral Head Replacement

ISSN: 1471-2474