Comparison of volume of IASHIs ordered, as a function of opinions regarding infection in subsequent THA*
| Believes THA infection increases after IASHI (from Table 3, question 7c) | Great loss if IASHI no longer available (from Table 1, question 4) | Injections ordered per year (from Table 1, question 2), mean, (SEM) and [no. of surgeons] |
|---|---|---|
| NO, infection not increased | YES, would be a great loss | 10.56 (1.18) [27]a |
| NO, no great loss | 3.83 (1.04) [35]b | |
| YES, infection may increase | YES, would be a great loss | 5.50 (3.07) [4] |
| NO, no great loss | 1.96 (1.64) [14]b | |
| Total = 5.46 (0.95) [80] |
Note: IASHI = intra-articular steroid hip injection; SEM = standard error of the mean; THA = total hip arthroplasty.
↵* Number of IASHI procedures ordered per year, pooled by opinions expressed on other questions in this survey. Surgeons were included in this comparison only if they had provided complete data on all questions pertinent to this table. Overall comparison was by analysis of variance (ANOVA) (p < 0.001 comparing all 4 groups, with observed power = 0.9), followed by post hoc pairwise Scheffét esting. The group marked a differed statistically from the 2 groups marked b (both were p < 0.001), but not from the fourth group (p = 0.50, not marked with b). The 2 groups marked with b did not differ from each other (p = 0.82).