Table 1

Characteristics of patients with OA, RA, AVN and other diagnoses (2-year cohort)
Diagnosis (%) or mean (SD)
RA OA AVN Other
(n=162) (n = 5,339) (n = 456) (n=211)
Agea 56 (17) 65 (13) 57 (17) 50 (15)
% women 65% 51% 49% 66%
BMI (kg/m2) 26 (5) 29 (6) 27 (6) 27 (6)
Age groupsa
 ≤60 yrs 45% 29% 52% 72%
 >60 to 70 yrs 31% 31% 23% 19%
 >70 to 80 yrs 23% 31% 19% 9%
 >80 yrs 1% 9% 6% 1%
BMI (kg/m2)
 <25 46% 23% 32% 40%
 25 to 29.9 33% 39% 41% 31%
 30 to 34.9 13% 25% 17% 22%
 35 to 39.9 6% 9% 5% 5%
 ≥40 2% 5% 4% 2%
ASA scorea
 Class I 5% 5% 8% 15%
 Class II 46% 57% 49% 55%
 Class III 49% 36% 42% 28%
 Class IV 0% 1% 1% 1%
Implant Fixationa
 Cemented 8% 12% 12% 8%
 Hybrid 66% 52% 48% 54%
 Uncemented 26% 36% 41% 38%
Deyo-Charlson Index 1 (1) 1 (2) 1 (2) 1 (2)
Depression 7% 7% 8% 4%
Anxiety 3% 4% 8% 2%
Distance Category
 0 to 100 miles 43% 48% 38% 36%
 >100 to 500 miles 47% 41% 49% 50%
 >500 miles or non-US 11% 11% 13% 14%

Numbers rounded to the nearest digit. ap<0.05 ASA, American Society of Anesthesiologists; AVN, avascular necrosis of bone; BMI, body mass index; OA, osteoarthritis; RA, rheumatoid arthritis; SD, standard deviation.

Singh and Lewallen

Singh and Lewallen BMC Medicine 2013 11:210   doi:10.1186/1741-7015-11-210

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