Table 2.

Correlations among Pain Rating Measures

CorrelationsNurse-Recorded NRS*Research Recorded NRSBPI
Severity During Last 24 hrSeverity During Last WeekInterference
Nurse recorded-NRS
Research recorded-NRS.653 (.362)
    Severity during last 24 hr.633 (.359).892
    Severity during last week.612 (.305).847.948
    Interference.417 (.162).594.689.754
  • * Pearson correlation values in parentheses reflect values for patients with whom the nursing staff used an informal approach rather than the formal 0 to 10 NRS scale to evaluate pain. In those cases, other correlations within the research interview were essentially unchanged.

  • NRS, numeric rating scale; BPI, Brief Pain Inventory.