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Frequency of measures of pain included in studies.
| Measure | # of studies using measure (%) |
|---|---|
| Author-created measures | 33 (45.2%) |
| Health-related quality of life or health status measures | 31 (42.5%) |
| Disease-specific measures | 9 (12.3%) |
| Valid pain measures | 7 (9.6%) |
| Chart review | 2 (2.7%) |
| Unclear | 2 (2.7%) |
