Table 5. Total ambulatory care costs per year from 1 to 7 years before TKR by treatment group.
| Total ambulatory care costs (€) | HA group who had TKR | N-HA group who had TKR | P-values* | |
|---|---|---|---|---|
| year TKR-1 | n | 1,296 | 366 | |
| Mean (±SD) | 744 (±600) | 805 (±652) | 0.104 | |
| Median [Q1—Q3] | 597 [371–934] | 618 [402–1,8] | ||
| year TKR-2 | n | 997 | 184 | |
| Mean (±SD) | 661 (±484) | 686 (±625) | 0.544 | |
| Median [Q1—Q3] | 526 [336–808] | 492 [324–812] | ||
| year TKR-3 | n | 621 | 97 | |
| Mean (±SD) | 615 (±448) | 613 (±497) | 0.612 | |
| Median [Q1—Q3] | 485 [307–758] | 473 [279–759] | ||
| year TKR-4 | n | 387 | 55 | |
| Mean (±SD) | 592 (±437) | 508 (±373) | 0.088 | |
| Median [Q1—Q3] | 474 [309–735] | 395 [252–665] | ||
| year TKR-5 | n | 228 | 31 | |
| Mean (±SD) | 571 (±420) | 435 (±309) | 0.039 | |
| Median [Q1—Q3] | 472 [285–720] | 331 [233–553] | ||
| year TKR-6 | n | 117 | 16 | |
| Mean (±SD) | 528 (±324) | 485 (±352) | 0.384 | |
| Median [Q1—Q3] | 463 [294–674] | 315 [265–687] | ||
| year TKR-7 | n | 47 | 10 | |
| Mean (±SD) | 474 (±281) | 544 (±394) | 0.983 | |
| Median [Q1—Q3] | 396 [296–584] | 358 [278–859] | ||
No missing data
n: number of patients, TKR: total knee replacement, HA group: patients who received at least one IA HA injection during their follow-up period, N-HA group: patients who received only CS as IA injections, IA: intra-articular, HA: hyaluronic acid, CS: corticosteroids.
* T-test, Wilcoxon (for mean difference)