Table 1 Risk of bias assessment

Defined sample

Inclusion/exclusion criteria were clearly specified

Yes

Comment:

No

Unsure

N/A

Representative sample

Clinical and demographic characteristics were well described

Yes

Comment:

No

Unsure

N/A

Recruitment procedure was specified (including source population) and appropriate

Yes

Comment:

No

Unsure

N/A

Somatosensory assessment

Somatosensory assessment method was standardized or validated

Yes

Comment:

No

Unsure

N/A

Method of somatosensory assessment was fully described

Yes

Comment:

No

Unsure

N/A

Blinding of assessment

Assessment of somatosensory function was blinded to participant group or condition

Yes

Comment:

No

Unsure

N/A

Controlled risk of known confounders

Factors known to influence pain assessment were evaluated or controlled for

Yes

Comment:

No

Unsure

N/A