Table 4.
Bootstrapped cost effectiveness analysis (complete case analysis)
| QALY or point change on vertigo symptom scale-short form (95% percentiles) | Total costs (95% percentiles) | Incremental QALY or vertigo symptom scale-short form | Incremental costs | Incremental cost effectiveness ratio | |
|---|---|---|---|---|---|
| Cost per QALY | |||||
| Routine care | 0.80 (0.76 to 0.85) | £35 (20 to 51) | Dominated* | ||
| Booklet self management only | 0.83 (0.79 to 0.86) | £31 (12 to 55) | — | ||
| Booklet self management with telephone support | 0.85 (0.80 to 0.90) | £60 (46 to 77) | 0.022 | £29 | £1363 |
| Cost per point change on vertigo symptom scale-short form | |||||
| Routine care | 3.2 (1.4 to 5.0) | £35 (21 to 51) | Dominated* | ||
| Booklet self management only | 4.2 (2.7 to 5.8) | £31 (12 to 55) | — | ||
| Booklet self management with telephone support | 4.5 (2.7 to 6.3) | £60 (46 to 77) | 0.227 | £29 | £129 |
*Booklet self management only group dominates the routine care group—that is, routine care was less effective and slightly more costly than booklet self management only. It is considered standard practice to compare groups with the next best option that is not dominated.57 Therefore, booklet self management with telephone support was compared with booklet self management only.