Table 2 Methodological adequacy of evaluations of suicide prevention interventions
1st author, year | Selection bias (A) | Allocation Bias (B) | Confounders (C) | Blinding (|D) | Data collection Methods (E) | Withdrawal & drop-outs (F) | Analysis (G) | Intervention integrity (H) |
|---|---|---|---|---|---|---|---|---|
La Fromboise 1995 [41] | Weak | Moderate | Moderate | N/A | Moderate | Moderate | -Citation for formula used in the analysis | -No consent rate reported, 76% follow-up rate. |
-High response rate | -Number of intervention sessions received by participants not reported. | |||||||
- Manual used with teacher training | ||||||||
-Random observations of intervention delivery by intervention co-ordinator | ||||||||
Berman, 1999 [42] | Strong | Strong | Strong | N/A | Strong | N/A | -Citations to justify analysis but no citations for analysis method | -Communities level of exposure to alcohol control reported and considered in analysis |
Tsey, 2000 [43] | Weak | Weak | Weak | N/A | Weak | Moderate | Citation to justify theory but not analysis | -No consent rate reported and follow-up rate only partially reported |
-Adaptation of existing Aboriginal-specific program, | ||||||||
-Components of each stage described | ||||||||
May, 2005 [39] | Moderate | Weak | Weak | N/A | Strong | N/A | -No citation for formula used in the analysis | - Number and type of prevention activities recorded but reported elsewhere |
- Staff growth for program delivery reported | ||||||||
Moderate | Weak | Weak | N/A | Moderate | Strong | - Citations to justify analysis but no citations for analysis method | -93% consent rate and 91% and 100% follow-up reported. | |
-Manual for tailored delivery, dependent on group's needs | ||||||||
-High response rate reported | ||||||||
Haggarty, 2006 [34] | Weak | Weak | Weak | N/A | Weak | Moderate | -No citation for analysis method | - 79% follow-up |
- length of time of participant’s exposed to multi-media resource recorded | ||||||||
Westerman, 2007 [38] | Weak | Weak | Weak | N/A | Moderate | Moderate | No description of analysis or citation. | -Consent rate not reported and 77% follow-up |
-Intervention delivered by Indigenous Psychological services | ||||||||
Muehlenkamp, 2009 [37] | Weak | Weak | Weak | N/A | Moderate | Weak | No citation for analysis method | -No consent rate reported and follow-up rate difficult to determine |
-Some report of intervention exposure | ||||||||
-Adaptation of existing intervention | ||||||||
Allen, 2009 [40] | Moderate | Weak | Strong | N/A | Moderate | Strong | -Citation for formula used in the analysis. | -61% consent rate reported for individual program component |
-Low to moderate response rates | Intervention toolkit for tailoring to local needs | |||||||
| Â | Â | Â | Â | Â | Â | Â | Â | -Intervention exposure (number and type of activities) measured and considered in analyses |