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Table 3 Methodological quality appraisal and effectiveness of interventions of included studies

From: A systematic review of school-based weight-related interventions in the Gulf Cooperation Council countries

Study author/s and date

Quality assessment using the EPHPP

Effectiveness of interventions

Selection bias

Study design

Confounders

Blinding

Data collection methods

Withdrawal and dropouts

Overall quality score

Body weight

Dietary behaviour

Physical activity

Sedentary behaviour

Al-Failakawi (2017) [43]

Strong

Strong

Moderate

Weak

Strong

Strong

Moderate

N

NR

E

E

Al-Jaaly (2017) [35]

Moderate

Weak

Weak

Weak

Weak

Weak

Weak

E

N

M

N

Allafi (2020) [36]

Weak

Moderate

Weak

Weak

Weak

Weak

Weak

N

NR

E

NR

Al-Mughamisi (2021) [44]

Moderate

Weak

Weak

Weak

Weak

Weak

Weak

NR

N

NR

NR

Bahathig & Abu Saad (2022) [37]

Moderate

Strong

Weak

Weak

Strong

Weak

Weak

N

NR

E

E

Choudhury et al. (2018) [38]

Strong

Weak

Weak

Weak

Strong

Strong

Weak

N

M

M

N

Elfaki et al. (2020) [39]

Moderate

Strong

Weak

Weak

Strong

Strong

Weak

N

E

E

NR

Hefni (2017) [45]

Strong

Weak

Weak

Moderate

Strong

Strong

Weak

N

E

E

E

Hussein (2017) [40]

Weak

Weak

Weak

Weak

Weak

Weak

Weak

E

NR

NR

NR

Kutbi et al. (2019) [41]

Moderate

Strong

Strong

Weak

Moderate

Strong

Moderate

N

N

N

N

Shama & Abdou (2009) [42]

Weak

Weak

Weak

Weak

Strong

Weak

Weak

E

E

NR

NR

  1. Acronyms: E Effective, M Mixed effect, N Not effective, NR Not reported, EPHPP Effective Public Health Practice Projects Quality Assessment Tool for Quantitative Studies