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Table 2 General and clinical characteristics in all patients and comparison before and after the establishment of regional rheumatoid and degenerative arthritis center

From: Establishment of a qualified integrated care system after total knee arthroplasty as a role of regional rheumatoid and degenerative arthritis centers

Variables All BEC AEC p value
Numbers 845 166 (19.6) 679 (80.4)  
Age 72.0 ± 5.8 71.1 ± 5.8 72.2 ± 5.7 0.03 *
 ≤ 59 16 (1.9) 4 (2.4) 12 (1.8) 0.108
60–69 258 (30.5) 63 (38.0) 195 (28.7)  
70–79 501 (69.3) 88 (53.0) 413 (60.8)  
 ≥ 80 70 (8.3) 11 (6.6) 59 (8.7)  
Elderly (≥ 65) 769 (91.0) 147 (88.6) 622 (91.6) 0.227
Old-elderly (≥ 70) 571 (67.6) 99 (59.6) 472 (69.5) 0.016 *
Very elderly (≥ 80) 70 (8.3) 59 (8.7) 11 (6.6) 0.436
Sex (female) 735 (87.0) 151 (91.0) 584 (86.0) 0.095
Op site (Right) 361 (42.7) 73 (44.0) 288 (42.4) 0.727
BMI 26.4 ± 3.4 27.1 ± 3.2 26.2 ± 3.5 0.003 **
Weight 62.1 ± 9.7 62.8 ± 8.9 62.0 ± 9.9 0.323
Obesity 528 (62.5) 124 (74.7) 404 (59.5)  < 0.001 **
LOS 16.6 ± 2.4 16.7 ± 2.3 16.5 ± 2.5 0.371
Rehabilitation 407 (48.2) 5 (3.0) 402 (59.2)  < 0.001 **
VAS 5.8 ± 0.5 5.7 ± 0.8 5.8 ± 0.4 0.094
K-L grade
 3/4 222 (26.3)/623 (73.7) 57 (34.3)/109 (65.7) 165 (24.3)/514 (75.7) 0.01 *
Underlying diseases
 HTN 564 (66.7) 121(72.9) 443 (65.2) 0.066
 DM 174 (20.6) 34 (20.5) 140 (20.6) 1
  1. Values are the mean ± standard deviation or numbers (%)
  2. EC, the establishment of regional rheumatoid and degenerative arthritis center, BEC before EC, AEC after EC, Op operation, BMI body mass index, LOS length of stay, VAS visual analogue scale, K-L Kellgrene-Lawrence, HTN hypertension, DM diabetes mellitus
  3. * p < 0.05
  4. ** p < 0.01