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Table 3 Quality of RCT studies included in the systematic review

From: Interventions targeting social isolation in older people: a systematic review

Study

Adequate sequence generationa

Allocation concealmenta

Blindinga

Incomplete data addresseda

Free of selective reportinga

Adjusted for imbalance at baselinea

Free of other biasa

Risk of bias

Constantino [66]

Yes

No

Unclear

Unclear

Yes

Yes

Yes

Moderate

Fukui et al [55]

Unclear

Unclear

Unclear

Yes

Yes

Yes

Yes

Moderate

Harris & Bodden [67]

Unclear

Unclear

Unclear

Unclear

Yes

Yes

Unclear

High

Kremers et al [68]

Unclear

Unclear

Unclear

Unclear

Yes

Yes

Yes

High

Lokk [69]

Unclear

Unclear

Unclear

Unclear

Yes

Yes

Yes

High

Ollonqvist et al [70]

Yes

Yes

Yes

Unclear

Yes

Yes

Yes

Moderate

Routasalo et al [13]

Yes

Yes

Unclear

Unclear

Yes

Yes

Yes

Moderate

Savelkoul & de Witte [56]

Unclear

Yes

Yes

Yes

Yes

Yes

Yes

Moderate

White et al, 2002 [64]

Unclear

Unclear

Unclear

Yes

Yes

Yes

Unclear

Moderate

Brennan et al [51]

Unclear

Unclear

No

Yes

Yes

Yes

Yes

Moderate

Heller et al [58]

Unclear

Unclear

Unclear

Unclear

Yes

Yes

Yes

High

MacIntyre et al [71]

Unclear

Unclear

Unclear

Yes

Yes

Yes

Unclear

Moderate

O'Loughlin et al [57]

Yes

Yes

Yes

Unclear

Unclear

Yes

Yes

Moderate

Schulz [59]

Unclear

Unclear

Unclear

Unclear

No

Yes

No

High

Slegers et al [72]

No

Unclear

Unclear

Yes

Yes

Yes

No

Moderate

Drentea et al [52]

Unclear

Unclear

Unclear

Unclear

Yes

Yes

Yes

High

  1. a Refer to Higgins & Altman [47] for a definition of these categories