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Table 2 Assessment of study quality using the quality assessment tool for quantitative studies

From: What do we know about physical activity interventions in vocational education and training? A systematic review

Author, year

Selection bias

Study design

Confounders

Blinding

Data collection methods

Withdrawals and dropouts

Global rating

Angerer et al., 2015 [36]

weak

moderate

weak

weak

weak

moderate

weak

Braun et al., 2014 [37]

weak

moderate

weak

weak

weak

moderate

weak

Chen et al., 2001 [38]

strong

moderate

weak

weak

moderate

strong

weak

Hankonen et al., 2017 [39]

moderate

strong

strong

moderate

moderate

weak

moderate

Lee et al., 2011 [40]

moderate

strong

strong

moderate

strong

strong

strong

Sickinger et al., 2018 [41]

moderate

moderate

weak

weak

weak

weak

weak

Spook et al., 2016 [42]

moderate

strong

strong

weak

moderate

weak

weak

Verloigne et al., 2017 [43]

moderate

moderate

weak

weak

strong

weak

weak

Walter et al., 2013 [44]

moderate

strong

strong

weak

strong

strong

moderate