Table 1 Pain outcomes at baseline and post-operatively
Pain outcomes | Number (%) * | |||
|---|---|---|---|---|
Baseline (pre-op) | 1-year post-op | 5-years post-op | 10-years post-op | |
Pain during walking (WOMAC – question 1) | ||||
“How bad is the pain in your hip when walking on a flat surface?” | ||||
None | 60 (1.57) | 1293 (66.34) | 1339 (46.74) | 622 (47.48) |
Slight | 314 (8.20) | 354 (18.16) | 607 (21.19) | 269 (20.53) |
Moderate | 1425 (37.22) | 233 (11.95) | 668 (23.32) | 312 (23.82) |
Severe | 2030 (53.02) | 69 (3.54) | 251 (8.76) | 107 (8.17) |
Ineligible ** | 1608 | 4242 | 2364 | 4530 |
Missing | 1399 | 645 | 1607 | 996 |
Pain using stairs (WOMAC – question 2) | ||||
“How bad is the pain in your hip when you go up or down the stairs?” | ||||
None | 62 (1.62) | 1048 (53.83) | 987 (34.55) | 463 (35.48) |
Slight | 195 (5.09) | 441 (22.65) | 656 (22.96) | 284 (21.76) |
Moderate | 982 (25.65) | 290 (14.89) | 681 (23.84) | 310 (23.75) |
Severe | 2589 (67.63) | 168 (8.63) | 533 (18.66) | 248 (19.00) |
Ineligible ** | 1608 | 4242 | 2364 | 4530 |
Missing | 1400 | 647 | 1615 | 1001 |
Night pain (WOMAC – question 3) | ||||
“How bad is the pain in your hip at night, in bed?” | ||||
None | 296 (7.73) | 1351 (69.32) | 1601 (55.82) | 757 (57.74) |
Slight | 655 (17.11) | 361 (18.51) | 590 (20.57) | 282 (21.51) |
Moderate | 1508 (39.38) | 174 (8.93) | 522 (18.20) | 203 (15.48) |
Severe | 1370 (35.78) | 63 (3.23) | 155 (5.40) | 69 (5.26) |
Ineligible ** | 1608 | 4242 | 2364 | 4530 |
Missing | 1399 | 645 | 1604 | 995 |
Pain interference (SF-12 – question 8) | ||||
“In the past 4 weeks, and because of your emotional state (such as feeling sad, nervous, or depressed), how much did your physical pain limit you in your work or household activities?” | ||||
Not at all | 64 (1.67) | 767 (39.78) | 800 (27.73) | 311 (23.72) |
A little bit | 345 (9.00) | 497 (25.78) | 689 (23.88) | 316 (24.10) |
Moderately | 1152 (30.05) | 398 (20.64) | 862 (29.88) | 420 (32.04) |
Quite a bit | 1556 (40.58) | 215 (11.15) | 417 (14.45) | 212 (16.17) |
Extremely | 717 (18.70) | 51 (2.65) | 117 (4.06) | 52 (3.97) |
Ineligible ** | 1608 | 4249 | 2373 | 4534 |
Missing | 1394 | 659 | 1578 | 991 |
Pain medication | ||||
“Do you take pain medication?” | ||||
Yes | 1338 (82.49) | 467 (25.42) | 530 (19.13) | 259 (21.95) |
Sometimes | 0 (0.00) | 367 (19.98) | 396 (14.29) | 198 (16.78) |
No | 284 (17.51) | 1003 (54.60) | 1845 (66.58) | 723 (61.27) |
Ineligible ** | 4333 | 4255 | 2373 | 4537 |
Missing | 881 | 744 | 1692 | 1119 |