VALIDATION DATA

Spanish and Vietnamese versions of the scale are available (https://www.dvcipm.org/clini​cal-resou​rces/defen​se-veter​ans-pain-rating-scale-dvprs/).

Evaluation of the preliminary version of the DVPRS (version 1.0) using data from inpatients and outpatients with predominantly chronic noncancer pain or acute postoperative pain demonstrated a high level of internal consistency reliability (Cronbach's α = 0.90 for the five items). Subsequent examination of the DVPRS version 2.0 using data from active-duty military personnel and veterans also demonstrated acceptable internal consistency reliability (Cronbach's α = 0.87)

Acceptable test-retest reliability for the pain intensity item (Pearson's r = 0.64; P < 0.001) and the supplemental items (Pearson's r of more than 0.70 for all items; P < 0.001) has also been reported

Preliminary evaluation of the content validity of the word descriptions integrated alongside the 11-point NRS demonstrated excellent agreement (intraclass correlation coefficient [ICC] = 0.94) 

Evaluation of the construct validity of the preliminary version of the DVPRS (version 1.0) using principal component factor analysis found that one factor accounted for 72% of the variance in the measure (factor loadings for all five items of more than 0.82). Subsequent examination of DPRS version 2.0 using data from active-duty military personnel and veterans supported a single-factor structure, explaining 66% of the variance in the measure (factor loadings for all five items of 0.53 or more). However, in this study, a two-factor solution was supported when factor extraction was fixed, indicating the need for further evaluation and confirmatory factor analysis