Chronic Pain Assessments in Children and Adolescents: A Systematic Literature Review of the Selection, Administration, Interpretation, and Reporting of Unidimensional Pain Intensity Scales

Table 2

Reasons for exclusion of studies after full-text review of eligibility.

Reason	Number of studies
Not in the defined age bracket (or does not describe age of children/adolescents)	30
Not chronic pain	21
No measure of pain	6
Review or prevalence study	9
Pain assessment tool not described	3
Qualitative study	1
Duplicate	2