Table 1.
Baseline characteristics, preoperative osteoarthritis severity, functional and risk assessment in this study, mean (SD)
| Indicators |
CM-TKA
(n=16) |
RA-TKA
(n=17) |
P value |
| Baseline characteristics | |||
| Gender (case, male/female) | 3/13 | 3/14 | 1.000 |
| Age [years, mean (SD)] | 67.3 (3.5) | 66.6 (3.7) | 0.768 |
| Body mass index [mean (SD)] | 25.5 (2.9) | 25.6 (3.3) | 0.321 |
| Occupation (I/II/III)a | 14/0/2 | 14/2/1 | 0.773 |
| Legion (I/II/III/IV)b | 7/4/3/2 | 8/6/2/1 | 0.590 |
| Operational side (left/right) | 11/5 | 6/11 | 0.084 |
| Osteoarthritis severity and functional assessment | |||
| Disease duration [years, mean (SD)] | 6.8 (4.7) | 6.2 (4.2) | 0.655 |
| Kellgren–Lawrence stage (III/IV) | 2/14 | 3/14 | 1.000 |
| Bone density [T value, mean (SD)] | −3.1 (0.8) | −3.1 (0.7) | 0.694 |
| Varus severity(I/II/III)c | 10/4/2 | 11/4/2 | 0.899 |
| VAS, mean (SD) | 6.1 (1.0) | 5.7 (1.1) | 0.184 |
| KSS, mean (SD) | 101.1 (32.2) | 109.3 (25.8) | 0.426 |
| HSS, mean (SD) | 58.4 (16.8) | 58.4 (16.8) | 0.581 |
| WOMAC, mean (SD) | 152.6 (46.1) | 148.9 (26.7) | 0.786 |
| Risk assessment | |||
| ASA score, mean (SD) | 1.6 (0.7) | 1.4 (0.6) | 0.525 |
| Preoperative comorbiditiesd, case | 6/1/2 | 6/0/2 | 0.809 |
| NRS2002, mean (SD) | 1.6 (0.8) | 1.5 (1.0) | 0.776 |
| Caprini scoree, mean (SD) | 1.9 (1.1) | 2.2 (1.0) | 0.420 |
| ADL-Barthel scoref, mean (SD) | 91.2 (4.9) | 90.0 (6.3) | 0.552 |
| Mental status (Nu-DESC)g, mean (SD) | 0.35 (0.5) | 0.42 (0.5) | 0.625 |
ASA American Society of Anesthesiologists, NRS2002 nutrition risk screening of 2002, VTE venous thrombus embolism, ADL activities of daily living, Nu-DESC Nursing Delirium Screening Scale, VAS visual analogue scale, KSS Keen Society Score, HSS Hospital for Special Surgery score, WOMAC Western Ontario and McMaster Universities Osteoarthritis Index
aOccupation: I, farmer; II, worker; III, office clerk (teacher, civil servants etc.)
bLegion: I, Chongqing; II, Sichuan; III, Guizhou; IV, other provinces
cVarus severity: I, mild (0~5°); II, moderate (5~10°); III, severe (>10°)
dPreoperative comorbidities: cardio-vascular/respiratory/metabolic diseases. They are expressed as classified variables as follows: cardiovascular diseases (coronary and cerebrovascular diseases, hypertension, etc.), respiratory diseases (chronic obstructive pulmonary disease, hypostatic pneumonia, etc.), metabolic diseases (diabetes, hyperthyroidism, etc.)
eCaprini score: VTE risk rating score. 0~1, low risk; 2, medium risk; 3~4, high risk; ≥5, extremely high risk
fADL-Barthel score: ≤40, severe dependence; 41-60, moderate dependence; 61-99, mild dependence; 100, no dependencies
gMental status (Nu-DESC): 0~1, normal; ≥2, delirium