Table 2 Reliability of cannabis screening instruments
From: Short scales to assess cannabis-related problems: a review of psychometric properties
Scale | Study | Internal consistency | Test-retest reliability | Item total correlation |
|---|---|---|---|---|
General population samples | ||||
SDS | Steiner et al. (2008) | .80 | ||
SDS | Martin et al. (2006) | .83 | .88 (total), .69 to .85 (items) | |
CAST | Legleye et al. (2007) | .81 [.74 for cannabis users] | .26 to .56 (pairs of items) | |
CUDIT | Annaheim et al. (2008) | .72 | .07 to .55 | |
PUM | Okulicz-Kozaryn (2007) | .92 | ||
Specific user samples | ||||
SDS | Swift, Hall et al. (1998) | .72 | ||
SDS | Hides et al. (2007) | .81 | ||
SDS | Ferri et al. (2000) | .78 | .74 (total), .46 to .76 (items) | |
CUDIT | Adamson & Sellman (2003) | .78 | .44 to .77 | |