Study (year)

1

2

3

4

5

6

7

8

9

10

Raw score (%)

Risk of bias

Cigrang et al. (2021)

N/A

1

N/A

1

N/A

N/A

N/A

1

0.5

1

4.5/10 (45)

High

McCarroll et al. (2010)

N/A

N/A

N/A

1

N/A

1

1

1

1

1

6/10 (60)

Moderate

McLeland et al. (2008)

0.5

0.5

0

1

1

0

0

1

1

1

6/10 (60)

Moderate

Salivar et al. (2020)

1

1

1

1

1

N/A

N/A

1

0.5

1

7.5/10 (75)

Low

Pye & Simpson (2017)

1

0

0.5

1

1

1

1

1

1

1

8.5/10 (85)

Low

Tupper et al. (2018)

N/A

N/A

N/A

1

N/A

0

0

1

1

1

4/10 (40)

High

Tupper et al. (2020)

1

1

1

1

1

1

1

1

1

1

10/10 (100)

Low

Mean

8/10 (80)