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