McGrath 2010.
| Methods | Controlled before and after study | |
| Participants | 60 adults with mild or moderate intellectual disabilities from 3 work centres (42 intervention/18 control) Gender: work centre A: 10 men/10 women, N = 20; work centre B: 10 Men/12 Women, N = 22; work centre C: 8 Men/10 Women, N = 18 Age: work centre A: 17 to 52 years; mean age 36 years (SD = 8.98); work centre B: 17 to 55 years; mean age 35 years (SD = 13.76); work centre C: 18 to 60 years; mean age 33 years (SD = 11.07) Geographical setting: Southwest Ireland |
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| Interventions | A ten‐week anti‐bullying programme; cognitive behavioural in nature; one 90‐minute session each week at centre A; the same programme at centre B with additional community input; centre. C acted as a waiting list control (no intervention). (individual/job interface level) |
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| Outcomes | Levels of victimisation and bullying behaviour; a modified version of the Mencap Bullying Questionaire (1999) was used to measure victimisation pre‐, post‐intervention, and at three‐month follow‐up. | |
| Notes | Very specific group of participants; findings not generalisable to population as a whole No information on how or why the intervention might work. Theoretical underpinning: cognitive behavioural approach Funding source: none stated Declarations of interest: none stated. |
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| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Blinding Subjects | High risk | no blinding |
| Blinding Outcome Assessors | High risk | no blinding |
| Retrospective unplanned subgroup analyses | Low risk | no data dredging |
| Follow‐up | Low risk | "Participants were re‐interviewed...three months after first administration..., and again for a three month follow‐up immediate post intervention and three month follow‐up" |
| Statistical tests | Low risk | appropriate for a small study |
| Compliance | Low risk | explicit |
| Outcome measures | High risk | self‐reported outcome measures, susceptible to social desirability |
| Selection bias (population) | Low risk | similar work centres in neighbouring towns |
| Selection bias (time) | Low risk | recruited over same time |
| Randomisation | High risk | no randomisation |
| Allocation concealment | High risk | no randomisation |
| Adjustment for confounding | High risk | confounders not identified |
| Incomplete outcome data | Low risk | data provided, no loss to follow‐up |