Table 2. Presentation of costs for each study after transforming costs to US dollars using Purchasing Power Parities (PPP), by inflating 1% annually.
| First author, Year, Country | Year of costing | Currency | Total costs: direct + indirect | PPP rate for the costing year * | Total costs transformed to USD using PPP | Recalculated with 1% inflation rate, present value 2020 (USD) |
|---|---|---|---|---|---|---|
| Bahia, 2018 [11], Brazil | 2013 | Brazilian Real | BRL 51,764,175 | 1.646 | $ 31,448,466 | $ 33,717,012 |
| Balbay, 2019 [6], Turkey | 2016 | USD | - | - | $ 123,000,000 (2035) | - |
| Besa-Creuz, 2018 [4], Mexico | 2016 | Mexican Peso | MXN 2,188,974.31 | 8.446 | $ 259,172.90 | $ 269,696.36 |
| Patel, 2019 [15], USA | 2015 | USD | $ 1,307 (per case) | - | - | $ 1,373.67 |
| Fox, 2016 [5], USA | 2012 | USD | $ 46,890 (1st year after) | - | - | $ 55,775.15 |
| $ 19,617 (2nd year) | $ 21,242.40 | |||||
| Henk 2015 [13], USA | 2012 | USD | $ 20,621 (1st year) | - | - | $ 22,329.59 |
| $ 16,786 (2nd year) | $ 18,176.83 | |||||
| $ 15,133 3rd year) | $ 16,386,87 | |||||
| Nichols, 2018 [14], USA | 2016 | USD | $ 17,848 | - | - | $ 18,572.70 |
| Dragomir, 2010 [12], Canada | 2002–2006 | Canadian dollars | CAD 71,000,000 | 1.234 (2008) | $ 57,536,466.80 | $ 66,136,684.90 |
PPP, Purchasing Power Parities; USD, US dollar; CAD, Canadian dollar.