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Table 2 Characteristics of OA patients by willingness to undergo TKR

From: Determinants of patient preferences for total knee replacement: African-Americans and whites

  Not willing (n = 208) Willing (n = 585) P valuea
Socio-demographic Characteristics    
 Race, n (%) African-American 106 (51.0) 176 (30.1) <0.001
 Age, mean ± SD, years 62.88 ± 10.64 62.28 ± 8.87 0.467
Education, n (%)    0.008
 ≤High School or GED 115 (55.3) 254 (43.4)
 Post-secondary/Associates/Bachelors 69 (33.2) 219 (37.4)
 graduate degree 22 (10.6) 109 (18.6)
Income, n (%)    <0.001
 <$10,000 39 (21.3) 76 (14.1)
 $10,000-$19,999 56 (30.6) 97 (18.0)
 $20,000-$29,999 21 (11.5) 88 (16.3)
 $30,000-$39,999 19 (10.4) 48 (8.9)
 $40,000-$49,999 16 (8.7) 47 (8.7)
 ≥$50,000 32 (17.5) 183 (34)
Employment status, n (%)    0.006
 Full time 40 (19.2) 174 (29.9)
 Part time 17 (8.2) 57 (9.8)
 Unemployed 34 (16.3) 48 (8.3)
 Disabled 40 (19.2) 92 (15.8)
 Retired 77 (37.0) 210 (36.1)
Health insuranceb, n (%)    
 Medicare 93 (46.3) 227 (40.8) 0.181
 Medicaid 37 (19.0) 78 (14.2) 0.114
 Private/group 81 (42.0) 292 (52.9) 0.009
 No insurance 14 (7.6) 19 (3.5) 0.021
 Recruitment site, n (%) non-Veterans Affairs 196 (94.2) 543 (92.8) 0.2247
Knowledge, attitudes and beliefs    
 Religiosity, mean ± SD 10.19 ± 3.78 9.59 ± 4.00 0.053
Knowledge of TKR: familiarity, n (%) yes
 Heard about hip/knee surgery 158 (76.7) 458 (79.0) 0.497
 Family or friend who had hip/knee surgery 160 (76.9) 498 (85.1) 0.007
 Good understanding of knee replacement 106 (51.0) 365 (64.9) 0.001
Knowledge of TKR: risks and benefits
How often death from knee replacement, n (%)    0.257
 Never 29 (14.7) 75 (13.4)  
 Extremely rare 134 (67.7) 406 (72.2)  
 Sometimes 32 (16.2) 79 (14.1)  
 Often 3 (1.5) 2 (0.4)  
How long in hospital after knee replacement, n (%)    0.023
 1 to 3 days 57 (28.2) 199 (34.6)  
 4 to 7 days 79 (39.1) 250 (43.5)  
 1 to 2 weeks 45 (22.3) 84 (14.6)  
 >2 weeks 21 (10.4) 42 (7.3)  
How long to recover from knee replacement, n (%)    0.378
 <2 weeks 1 (0.5) 3 (0.5)  
 2 weeks to 1 month 9 (4.5) 30 (5.2)  
 1 to 2 months 44 (22.1) 140 (24.3)  
 2 to 6 months 78 (39.2) 233 (40.4)  
 6 to 12 months 50 (25.1) 146 (25.3)  
 >12 months 17 (8.5) 25 (4.3)  
How much pain after recovery, n (%)    <0.001
 None 17 (8.5) 87 (15.4)  
 A little 74 (37.0) 267 (47.2)  
 A moderate amount 98 (49.0) 205 (36.2)  
 An extreme amount 11 (5.5) 7 (1.2)  
How much difficulty walking after recovery, n (%)    <0.001
 None 14 (6.9) 120 (21.0)  
 A little 98 (48.0) 306 (53.5)  
 A moderate amount 84 (41.2) 134 (23.4)  
 An extreme amount 8 (3.9) 12 (2.1)  
 Expectations of TKR, mean ± SD 44.48 ± 17.26 53.40 ± 13.90 <0.001
TKR utilization process, n (%) yes
 Doctor ever discussed surgery 65 (31.6) 213 (36.5) 0.204
 Referred to arthritis specialist 67 (33.0) 172 (29.9) 0.404
 Referred to surgeon 101 (49.3) 268 (47.0) 0.580
 Doctor recommended surgery 47 (22.8) 130 (22.4) 0.906
Trust in physicians, mean ± SD 38.62 ± 6.75 39.77 ± 6.65 0.034
Trust in healthcare system, mean ± SD 26.11 ± 6.17 25.32 ± 5.55 0.090
  1. a P value from Pearson chi square or t test. bIndividuals may be included in multiple categories. TKR total knee replacement, GED General Educational Development test