| Parameter | Value | Source |
|---|---|---|
| Ko = purchase price of oscillating device | £40.50 | Table 4 |
| Kp = purchase price of PEP device | £70.67 | Table 5 |
| T = training | £57 | NHS Reference Costs 2015/16, WF01B, non-consultant-led, non-admitted, first physiotherapy attendance |
| r = discount (interest) rate | 3.5% | NICE reference case |
| n = equipment lifespan | 5 years | Best case scenario informed by committee |
| A (n,r) = annuity factor (n years at interest rate r) | 4.67 | Calculated |
| Eo = equivalent annual cost of oscillating devices | £20.86 | Calculated |
| Ep = equivalent annual cost of PEP | £27.39 | Calculated |
| n = equipment lifespan | 2 years | Worst case scenario informed by committee |
| A (n,r) = annuity factor (n years at interest rate r) | 1.97 | Calculated |
| Eo = equivalent annual cost of oscillating devices | £49.59 | Calculated |
| Ep = equivalent annual cost of PEP | £65.10 | Calculated |
NA, not applicable; NICE, National Institute for Health and Care Excellence; PEP, positive expiratory pressure
From: Appendix K, Health Economics
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