Table 2

Quality assessment of included studies

Selection Bias

Procedure Bias

Detection Bias

Attrition Bias


Author/year

Representative sample

Consecutive cases

Specific Co-intervention

Pre-post assessment

Independent/

blind assessment

Objective Results

Follow-up >80%


Lieberman[25]

2003.

Yes

Yes

No

Yes

Yes

Yes

NR


Fourney[26]

2003.

Yes

Yes

Yes

Yes

Yes

Yes

No


Lane[27]

2004.

Yes

Yes

Yes

Yes

NR

Yes

Yes


Vrionis[28]

2005.

Yes

Yes

Yes

Yes

NR

NR

Yes


Kose[30]

2006.

Yes

NR

Yes

Yes

NR

Yes

Yes


Pflugmacher[33]

2007.

Yes

NR

Yes

Yes

NR

Yes

Yes


Pflugmacher[34]

2008.

Yes

Yes

Yes

Yes

Yes

Yes

No


NR: Not reported

Bouza et al. BMC Palliative Care 2009 8:12   doi:10.1186/1472-684X-8-12

Open Data