Table 2 Clinical characteristics of the sample of subjects scheduled for TKA by WOMAC pain group
From: Association between activity limitations and pain in patients scheduled for total knee arthroplasty
| Â | WOMAC Pain Group | p-value (trend) | |||
|---|---|---|---|---|---|
Low | Medium | High | Overall | ||
(0–25) | (26–40) | (41–100) | |||
n = 43 (21 %) | n = 68 (34 %) | n = 91 (45 %) | n = 202 | ||
WOMAC Pain: mean (SD) | 16 (7) | 35 (4) | 58 (14) | 41 (12) | <0.001 |
WOMAC Function: mean (SD) | 23 (11) | 35 (10) | 54 (14) | 41 (18) | <0.001 |
HRQoL (EQ-5D-3Â L Index): mean (SD) | 0.81 (0.08) | 0.77 (0.08) | 0.64 (0.18) | 0.72 (0.15) | <0.001 |
KOOS Sport and Activity: mean (SD) | 63 (20) | 68 (24) | 84 (19) | 74 (23) | <0.001 |
Knee extension: no. (%) | Â | Â | Â | Â | 0.006 |
 More than 50 from straight | 19 (44 %) | 36 (54 %) | 62 (68 %) | 117 (58 %) |  |
 Completely straight | 24 (56 %) | 31 (46 %) | 29 (32 %) | 84 (42 %) |  |
Knee flexion: no. (%) | Â | Â | Â | Â | 0.046 |
 1000 or less | 5 (12 %) | 11 (16 %) | 23 (25 %) | 39 (19 %) |  |
 More than 1000 | 38 (88 %) | 57 (84 %) | 68 (75 %) | 163 (81 %) |  |
Limp: no. (%) | Â | Â | Â | Â | 0.001 |
 Moderate to severe | 15 (35 %) | 29 (43 %) | 57 (63 %) | 101 (50 %) |  |
 None to slight | 28 (65 %) | 39 (57 %) | 34 (37 %) | 101 (50 %) |  |
Walking distance: no. (%) | Â | Â | Â | Â | <0.001 |
 Less than 5 blocks | 8 (19 %) | 26 (38 %) | 54 (59 %) | 88 (44 %) |  |
 5 to 20 blocks | 20 (48 %) | 31 (46 %) | 30 (33 %) | 81 (40 %) |  |
 Unlimited | 14 (33 %) | 11 (16 %) | 7 (8 %) | 32 (16 %) |  |
How much did pain interfere with work or housework?: no. (%) | Â | Â | Â | Â | <0.001 |
 Moderately to extremely | 15 (35 %) | 43 (63 %) | 79 (87 %) | 137 (68 %) |  |
 Not at all to a little bit | 28 (65 %) | 25 (37 %) | 12 (13 %) | 65 (32 %) |  |
Use of a supportive device: no. (%) | Â | Â | Â | Â | 0.10 |
 Yes | 9 (21 %) | 15 (22 %) | 30 (33 %) | 54 (27 %) |  |
 No | 34 (79 %) | 53 (78 %) | 61 (67 %) | 148 (73 %) |  |