Table 1: Patients’ characteristics and a general comparison of the first and second staged Total Knee Arthroplasty (TKA) procedures.
| Parameter |
1st TKA (n = 32) |
2nd TKA (n = 32) |
| Age (yr) |
72 [69,76] |
74 [71,78] |
| Sex (male/female) |
4/28 |
4/28 |
| Weight (kg) |
61 [53,72] |
66 [52,71] |
| Height (cm) |
150 [146,155] |
149 [145,156] |
| BMI (kg/m2) |
27[23,31] |
27[24,31] |
| ASA physical status score (I/II) |
0/32 |
0/32 |
| Interval between 1st and 2nd TKA |
14 [11,23] (range; 6–77) |
| Preoperative WBS |
3 [2,3] |
2 [1,2] |
| Operation time (min.) |
58 [52,60] |
60 [55,66] |
| Tourniquet time (min) |
59 [53,64] |
61 [56,66] |
| Anesthesia time (min) |
90 [82,97] |
98 [90,116] |
| HSS Score |
43 [34,49] |
48 [36,54] |
| K/L Grade (III/IV) |
3/ 29 |
4/ 28 |
| Preoperative WBS |
3 [2,3] |
2 [1,2] |
| Design (PCLR/PCLS) |
7/25 |
8/24 |
Values are expressed as n or median [25th percentile, 75th percentile].
BMI: body mass index, HSS score: Hospital for Special Surgery Score [14], K/L Grade: Kellgren–Lawrence grade [15], WBS: Wong–Baker FACES pain assessment scale [13], PCLR: posterior cruciate ligament-retaining meniscal-bearing type, PCLS: posterior cruciate ligament-sacrificing rotating platform type