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Table 1 Risk of bias/methodological quality [36] of included studies

From: The prevalence of orthorexia in exercising populations: a systematic review and meta-analysis

Study ID

1. N-representativeness

2. N-frame

3. Random selection

4. Non-response bias

5. Primary data

6. Operationalization

7. Instrument

8. Consistency

9. Period

10. Estimation

Total Risk§ score

Risk Category

Almeida et al. [34]

1

1

1

0

0

0

0

0

0

0

3

Low

Bert et al. [76]

1

1

1

0

0

0

0

0

0

1

4

Moderate

Bo et al. [75]

1

1

1

0

0

0

0

0

0

0

3

Low

Civil [79]

1

1

1

0

0

0

0

0

0

0

3

Low

Clifford and Blyth [4]

0

1

1

0

0

0

0

0

0

0

2

Low

Dabal [80]

0

1

1

0

0

0

0

0

0

0

2

Low

Dunn et al. [17]

1

1

1

0

0

0

0

0

0

0

3

Low

Erkin and Göl [78]

1

1

1

0

0

0

0

0

0

0

3

Low

Freire et al. [77]

1

1

1

0

0

0

0

0

0

0

3

Low

Kattan [84]6

1

0

0

0

0

0

0

0

0

0

1

Low

Keller and Konradsen [71]

1

1

1

0

0

0

0

0

0

0

3

Low

Kiss-Leizer et al. [83]

1

1

1

0

0

1

0

0

0

0

4

Moderate

Labossiere and Thibault [86]

1

1

1

1

0

0

0

0

0

0

4

Moderate

Lewis [70]

1

1

1

1

0

0

0

0

0

0

4

Moderate

Malmborg et al. [82]

0

1

1

1

0

0

0

0

0

0

3

Low

De Marchi and Baratto [68]

1

1

1

1

0

0

0

0

0

0

4

Moderate

Rizzieri et al. [74]

0

1

1

0

0

0

0

0

0

0

2

Low

Rudolph and Göring [36]

0

1

1

0

0

0

0

0

0

0

2

Low

Segura-Garcia et al. [33]

1

1

1

0

0

0

0

0

0

0

3

Low

da Silva et al. [72]

1

1

1

0

0

1

0

0

0

0

4

Moderate

Surala et al. [16]

0

1

1

0

0

0

0

0

0

0

2

Low

Tocchetto et al. [73]

1

1

1

0

0

0

0

0

0

0

3

Low

Uriegas et al. [69]

1

1

1

0

0

0

0

0

0

0

3

Low

Herranz Valera et al. [85]

1

1

0

1

0

0

0

0

0

0

3

Low

  1. Item score: (0: low risk, 1: high risk). §Total quality/risk score: [range (0–10): high quality/low risk (0–3), moderate quality/risk (4–6), poor quality/high risk (7–10)]