Table 1.
Demographic characteristics of participants.
| Items | Non-Obese | Obese | Obese-Sarcopenic | p Value | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| mean | ± | SD | mean | ± | SD | mean | ± | SD | ||
| n | 205 | 323 | 59 | |||||||
| Women, n (%) | 160 | (78.0) | 249 | (77.1) | 39 | (66.1) | 0.15 d | |||
| Age (years) | 70.9 | ± | 6.9 | 67.8 | ± | 6.3a | 75.1 | ± | 6.1 a | <0.001 b |
| Age category, n (%) | <0.001 d | |||||||||
| <65 years | 44 | (21.5) | 156 | (48.3) | 10 | (16.9) | ||||
| 70−74.9 years | 101 | (17.1) | 105 | (32.5) | 21 | (35.6) | ||||
| ≥75 years | 60 | (29.2) | 62 | (19.2) | 28 | (47.5) | ||||
| BMI (kg/m2) | 22.9 | ± | 1.8 | 30.6 | ± | 3.9 a | 27.0 | ± | 2.1 a | <0.001 c |
| ALM (kg) | 16.0 | ± | 3.2 | 17.9 | ± | 3.6 a | 13.8 | ± | 2.8 a | <0.001 c |
| AMI (kg/m2) | 6.64 | ± | 0.91 | 7.56 | ± | 0.98 a | 5.96 | ± | 0.75 a | <0.001 c |
| CIRS score | 8.4 | ± | 5.7 | 10.1 | ± | 5.5 a | 10.9 | ± | 6.2 a | 0.001 c |
| Surgical time (min) | 149 | ± | 35 | 152 | ± | 39 | 155 | ± | 33 | 0.35 b |
| LOS (day) | 5.3 | ± | 1.6 | 6.5 | ± | 2.4 a | 6.2 | ± | 1.9 a | <0.001 c |
| Follow-up time (week) | 13.7 | ± | 7.3 | 16.4 | ± | 7.7 a | 19.5 | ± | 8.9 a | <0.001 c |
| TKR leg, Right, n (%) | 123 | (60.0) | 181 | (56.0) | 31 | (52.5) | 0.51 d | |||
| KL grade, TKR leg, n (%) | 0.33 d | |||||||||
| 3 | 103 | (50.2) | 165 | (51.1) | 24 | (40.7) | ||||
| 4 | 102 | (49.8) | 158 | (48.9) | 35 | (59.3) | ||||
| MNA-SF <12 points | 76 | (37.1) | 92 | (28.5) | 27 | (45.8) | 0.01 d | |||
| Number of comorbidities, n (%) | ||||||||||
| Hypertension | 129 | (62.9) | 228 | (70.6) | 40 | (67.8) | 0.19 d | |||
| DM | 37 | (18.0) | 139 | (43.0) | 22 | (37.3) | <0.001 d | |||
| Cardiopulmonary disease | 94 | (45.9) | 174 | (53.9) | 29 | (49.2) | 0.19 d | |||
| Leg fracture | 12 | (5.9) | 15 | (4.6) | 3 | (5.1) | 0.83 d | |||
| Knee flexion ROM (degree) | ||||||||||
| Presurgery | 118 | ± | 14 | 108 | ± | 13 a | 101 | ± | 15 a | <0.001 b |
| Inpatient discharge |
102 | ± | 10 | 95 | ± | 10 a | 94 | ± | 10 a | <0.001 b |
a A significant difference compared with the reference group, p < 0.05. b One-way analysis of variance. Post-hoc analysis was performed using the Bonferroni test. c One-way analysis of variance. Post-hoc analysis was performed using the Games-Howell test. d Chi-Square Test. AMI, appendicular mass index; BMI, body mass index; CIRS, Cumulative Illness Rating Scale; DM, diabetes mellitus; ROM, gait speed; K-L grade, Kellgren-Lawrence grade; MNA-SF, Mini Nutritional Assessment Short Form scale; SD, standard deviation; TKR, total knee replacement.