Table 1. Subjects' characteristics.
| Characteristic | Groups of patients | |||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| N (number of men) | 27 (2) | 20 (1) | 20 (3) | 20 (4) |
| Age, mean (SD) years | 69.2 (6) | 67.1 (9.4) | 65.9 (11) | 69.3 (9.5) |
| Body mass index, mean (SD) kg/m2 | 29.5 (4.1) | 30.6 (4.5) | 29.1 (4) | 30.2 (4.1) |
| Symptoms since, mean (SD) years | 8.4 (6.6) | 10.6 (5.2) | 9.8 (5.4) | 8.1 (4.1) |
| Range of movement, mean (SD) grades | ||||
| Before surgery | 108 (21) | 108 (12) | 110 (9) | 112 (9) |
| After surgery | 84 (9) | 84 (7) | 87 (9) | 90 (7) a b |
| Prosthesis | ||||
| PS | 19 | 18 | 18 | 18 |
| CR | 8 | 2 | 2 | 2 |
| Knee axis | ||||
| Varus mean (SD) degrees | 7.76 (6.87) | 8.43 (5.81) | 8.08 (6.20) | 11.00 (6.60) |
| Valgus mean (SD) degrees | 6.20 (8.94) | 10.38 (9.62) | 9.70 (7.87) | 11.67 (9.83) |
a
PS: posterior stabilized; CR: cruciate retaining. Group 1: only subarachnoid anaesthesia; group 2: subarachnoid anesthesia and local anesthesia of periarticular soft tissue; group 3: subarachnoid anesthesia and local periarticular soft tissue anesthesia and postoperative femoral nerve block; group 4: subarachnoid anesthesia and pre-emptive infiltration anesthesia and local periarticular soft tissue anaesthesia. : P=0.01 as compared to group 1.
b
: P=0.001 as compared to group 2.