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Table 1 Clinical and demographic characteristics of study cohorts

From: Depression in primary TKA and higher medical comorbidities in revision TKA are associated with suboptimal subjective improvement in knee function

  Primary TKA Revision TKA
  2-year (n = 7,139) 5-year (n = 4,234) 2-year (n = 1,533) 5-year (n = 881)
Mean age (±standard deviation) 68 ± 10 68 ± 10 69 ± 10 69 ± 10
Men/Women (%) 44%/56% 45%/55% 49%/51% 51%/49%
Age groups (%)     
≤60 yrs 18% 18% 20% 20%
>60-70 yrs 35% 37% 29% 31%
>70-80 yrs 38% 38% 42% 41%
>80 yrs 8% 7% 9% 8%
Body mass index (%)     
<25 kg/m 2 13% 13% 13% 14%
25-29.9 kg/m 2 35% 36% 36% 39%
30-34.9 kg/m 2 29% 43% 29% 27%
35-39.9 kg/m 2 14% 7% 14% 14%
≥40 kg/m 2 9% 7% 7% 5%
American Society of Anesthesiologists (ASA) cass     
Class I-II 58% 58% 50% 53%
Class III-IV 42% 41% 50% 47%
Deyo-Charlson index, mean (±standard deviation) 1.2 ± 1.9 1.1 ± 1.9 1.0 ± 1.7 1.0 ± 1.4
Deyo-Charlson comorbidities (%)     
Myocardial infarction 5% 5% 4% 4%
Congestive heart failure 4% 3% 4% 2%
Peripheral vascular disease 5% 4% 3% 2%
Cerebrovascular disease 7% 7% 7% 6%
Dementia 0.2% 0.1% 0.2% 0.1%
Chronic Obstructive Pulmonary Disease (COPD) 11% 10% 9% 9%
Ulcer disease 8% 9% 7% 7%
Mild liver disease 2% 2% 1% 2%
Diabetes 9% 8% 10% 7%
Diabetes with organ damage 2% 2% 2% 2%
Hemiplegia 0.3% 0.2% 0.4% 0.3%
Moderate/severe renal disease 6% 4% 4% 2%
Moderate/severe liver disease 0.4% 0.2% 0.5% 0.5%
Metastatic solid tumor 3% 3% 1% 1%
AIDS 0% 0% 0.1% 0.1%
Rheumatologic disease 7% 8% 8% 8%
Other cancer 14% 13% 10% 7%
Psychological comorbidity (%)     
Anxiety 6% 5% 5% 3%
Depression 11% 8% 8% 5%
Distance from medical center     
<100 miles 53% 51% 32% 34%
100-500 miles 39% 41% 57% 54%
>500 miles 8% 8% 11% 12%
Implant fixation (cement status)     
Uncemented 98% 99.7% 0% 0%
Cemented/hybrid 2% 0.3% 100% 100%
Operative diagnosis     
Osteoarthritis 94% 93%   
Rheumatoid arthritis 4% 4%   
Loosening/wear/osteolysis    57% 61%
Dislocation/fracture/instability/non-union    22% 20%
Failed prior arthroplasty with components removed/infection    21% 19%
Other 2% 3%