Table 2

Outcomes reported by included studies

ProgrammeFollow-upAnalysis samples: intervention vs controlOutcomes as reportedFindings: postintervention, intervention vs controlFindings: 18 months postintervention, intervention vs control
BBBS28 29Single follow-up conducted 18 months after randomisation487 vs 472Number of times hit someoneMean 1.83 vs 2.68, p<0.05
Number of times involved in a fightMean 1.52 vs 1.54, p>0.10
NGYCP36–38First follow-up at 21 months postrandomisation (after completion of postresidential phase); second follow-up at 39 months postrandomisation (18 months after programme completion)736 vs 460 (first follow-up)
722 vs 452 (second follow-up)
Any violent incidents in last 12 months54.0% vs 57.3%, p=0.26348.7% vs 44.5%, p=0.157
Charged with a violent crime in last 12 months3.4% vs 3.6%, p=0.842
Convicted of a violent crime in last 12 months1.4% vs 1.2%, p=0.7482.1% vs 2.3%, p=0.208
Number of violent incidents in last 12 monthsMean 2.0 vs 2.3, p=0.035Mean 0.9 vs 0.8, p=0.388
QOP30 31End of programme's fourth year (near graduation from high school)589 vs 480Involved in gang fight in last 12 months16.0% vs 14.0%, p>0.10
  • BBBS, Big Brothers Big Sisters; NGYCP, National Guard Youth ChalleNGe Program; QOP, Quantum Opportunity Project.