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Logo of bmcpsycBioMed Centralsearchsubmit a manuscriptregisterthis articleBMC Psychiatry
 
From:
Published online 2008 August 18. doi: 10.1186/1471-244X-8-70

Table 1

Classification of quality indicators of studies included in the review

SamplingParticipation ratePopulationSample size
1 = Non-random1<60%1 = Selected1<100
2 = Random2 ≥ 60%2 = General2 ≥ 100
Bagley 1997 [9]2221
Bontempo & D'Augelli 2002 [10]Not known212
Case et al. 2004 [11]*1212
Cochran & Mays (2000a) & Mays, Ross (2004) [12,13]1221
Cochran & Mays (2000b) [14]1221
Cochran et al. 2003 & Mays & Cochran (2001) [15,16]2221
Faulkner et al. (1998) [17]Not known112
Fergusson et al 1999 [18]*1211
Gilman et al. 2001 [19]2222
Gruskin et al. 2001 [20]2122
Herrell et al. 1999 [21]Not known212
Jorm et al. 2002 [22]2122
King et al. 2003 [1]1NA12
Mathy 2002 [23]1112
Mathews et al. 2002 [24]1112
McCabe et al. 2003 [25]2112
Mc Cabe et al. 2004 [26]2111
Nawyn et al. 2000 [27]Not known111
Remafedi et al. 1998 [28]Not known212
Robin et al. 2002 [29]Not known212
Russell & Joyner 2001 [30]Not knownNot known12
Sandfort et al. 2001 & Sandfort, de Graf, Bijl (2003) [31,32]2221
Skegg et al. 2003 [33]*1211
Wichstrom & Hegna 2003 [34]*1212
Drabble et al. 2005 [35]2Not known22

Key: * Longitudinal studies; 2 suggests higher quality and than 1