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Table 1 Summary of the included studies

From: Reliability generalization meta-analysis of orthorexia nervosa using the ORTO-11/12/15/R scale in all populations and language versions

S. no.

References

Study

Source

Language

Sample*

Scale version

Population

Sex (Female%)

Mean Age (Years)

Quality assessment

1

[29]

Alvarenga MS et al. 2012

Eat Weight Disord

Portuguese

392

ORTO-15

Dietitians

93%

31.7 ± 8.9

Moderate

2

[30]

Babeau C et al. 2020

Eat Weight Disord

French

768

ORTO-12

General Adults

84.8%

29.2 ± 12.9

High

3

[22]

Gkiouras K et al. 2022

Hormones (Athens)

Greek

848*

ORTO-15, ORTO-12, and ORTO-R

General Adults

66%

35.4 ± 12.1

High

4

[11]

Gonidakis F et al. 2021

Eat Weight Disord

Greek

120

ORTO-15

University Students

NR

21.6 ± 2.1

Low

5

[10]

Haddad C et al. 2020

Eat Weight Disord

Arabic

806

ORTO-15

General Adults

66.5%

27.6 ± 11.8

High

6

[34]

Heiss S et al. 2019

Appetite

English

381

ORTO-15

Vegetarian and vegans

80.8%

31.0 ± 12.9

Moderate

7

[36]

Li WL et al. 2022

Eat Weight Disord

Chinese

1289

ORTO-15 and ORTO-R

University Students

37.9%

20.9 ± 2.0

High

8

[20]

Meule A et al. 2020

Appetite

German

324

ORTO-15

General Adults

63.4%

43.4 ± 18.1

Moderate

9

[37]

Missbach B et al. 2015

PLoS One

German

1029

ORTO-15 and ORTO-9

General Adults

74.6%

31.2 ± 10.4

High

10

[38]

Mitrofanova E et al. 2021

Eat Weight Disord

English

50

ORTO-15

General Adults

60%

34.5 ± 13.8**

Low

11

[59]

Mohamed Halim Z et al. 2020

Public Health Nutr

English

286

ORTO-15

General Adults

100%

31.1 ± 11.6

Low

12

[39]

Moller S et al. 2019

Eat Weight Disord

English

585

ORTO-15, ORTO-11 and ORTO-9

General Adults

82.4%

33.4 ± 11.5**

Moderate

13

[23]

Parra-Fernandez ML et al. 2019

Eat Weight Disord

Spanish

492

ORTO-11

University Students

56.9%

19.8 ± 2.5

Moderate

14

[13]

Parra-Fernandez ML et al. 2018

PLoS One

Spanish

454

ORTO-15

University students

65%

21.5 ± 0.3

Moderate

15

[24]

Rogoza R et al. 2022

Eat Weight Disord

Arabic

363

ORTO-R

University students

61.7%

22.8 ± 3.6

Moderate

16

[19]

Rogoza R et al. 2021

Eat Weight Disord

Italian

525*

ORTO-R

General Adults

NR

NR

Moderate

17

[21]

Roncero M Study 1 et al. 2017

Span J Psychol

Spanish

807

ORTO-15 and ORTO-11

General Adults

74.1%

23.7 ± 6.4**

High

18

[21]

Roncero M Study 2 et al. 2017

Span J Psychol

Spanish

243

 = 

 = 

 = 

 = 

Low

19

[40]

Stochel M et al. 2015

Psychiatr Pol

Polish

399

ORTO-15

High School Students

63.4%

16.9 ± 1.0

Low

20

[7]

Varga M et al. 2014

BMC Psychiatry

Hungarian

810

ORTO-15 and ORTO-11

University Students

89.4%

32.4 ± 10.4

Moderate

21

[42]

Vuillier L et al. 2020

J Eat Disord

English

196

ORTO-15 and ORTO-7

General Adults

85.2%

27.9 ± NR

High

  1. NR not reported
  2. *Reported McDonald’s omega for internal consistency instead of Cronbach’s alpha, ** combined data as age reported for males and females separately, Quality assessment evaluated using the COnsensus-based Standards for the selection of health status Measurement Instruments (COSMIN)