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Table 5 Quality appraisal of included quantitative studies (n = 18)

From: A systematic review of the health and well-being impacts of school gardening: synthesis of quantitative and qualitative evidence

First author (year) EPHPP criteria for quantitative studies
Selection bias Study design Confounders Blinding Data collection Withdrawals and dropouts Overall rating
Block (2012) [24]
Block (2009) [25]
Gibbs (2013) [26]
Weak Strong Weak Moderate Moderate Strong Weak
Brouwer (2013) [21] Weak Strong Weak Moderate Strong Weak Weak
Christian (2014) (1), [9] Christian (2014) (2) Trial 1 [10] Weak Strong Moderate Moderate Moderate Weak Weak
Christian (2014) (2) Trial 2 [10] Weak Strong Moderate Moderate Moderate Moderate Moderate
Cotter (2012) [22] Weak Strong Weak Moderate Strong Strong Weak
Cotugna (2012) [27] Moderate Strong Weak Weak Weak Weak Weak
Davis (2011) [28]
Gatto (2012) [29]
Moderate Strong Strong Moderate Strong Strong Moderate
Jaenke (2012) [15]
Morgan (2010) [30]
Moderate Moderate Strong Moderate Weak Strong Moderate
McAleese (2007) [16] Weak Strong Weak Moderate Moderate Weak Weak
Meinen (2012) [31] Moderate Moderate Weak Weak Weak Moderate Weak
Morris (2001) [32] Weak Moderate Weak Moderate Weak Weak Weak
Morris (2002) (1) [33]
Morris (2002) (2) [34]
Moderate Weak Weak Moderate Moderate Strong Weak
O’Brien (2006) [35] Weak Weak Weak Moderate Weak Weak Weak
Parmer (2007) [36]
Parmer (2009) [37]
Weak Moderate Weak Moderate Weak Weak Weak
Ratcliffe (2011) [38] Weak Weak Weak Moderate Moderate Moderate Weak
Robinson (2005) [39] Weak Weak Weak Moderate Weak Weak Weak
Waliczek (2001) [17] Weak Weak Weak Moderate Strong Weak Weak
Wells (2014) [23] Weak Moderate Moderate Moderate Moderate Moderate Moderate
  1. Where multiple publications reported quantitative data from the same study, they were appraised as one study