Authors | Country | Cost ($) | Difference ($) | Coefficient |
Ndom et al. (our study) | Cameroon | 573 | Ref* | Ref |
Bhojani et al. | Canada | 2985 | 2412 | 5.21 |
Tsinberg et al. | United States | 28,023 | 27,450 | 48.90 |
Canon et al. | United States | 31,400 | 30,827 | 54.80 |
Medbery et al. | United States | 10,410 | 9737 | 18.17 |
Kawaguchi et al. | Japan | 1054 | 481 | 1.84 |
Stoot et al. | Netherlands | 2987 | 2414 | 5.21 |
Polignano et al. | United Kingdom | 7583 | 7010 | 13.23 |
Abu Hilal et al., LLS | United Kingdom | 5562 | 4989 | 9.71 |
Abu Hilal et al., RH | United Kingdom | 6846 | 6273 | 11.95 |
Bell et al. | United Kingdom | 2236 | 1663 | 3.90 |