Rhudy Jamie L, Arnau Randolph C, Huber Felicitas A, Lannon Edward W, Kuhn Bethany L, Palit Shreela, Payne Michael F, Sturycz Cassandra A, Hellman Natalie, Guereca Yvette M, Toledo Tyler A, Shadlow Joanna O
The University of Tulsa, Department of Psychology, Tulsa, OK, USA.
University of Southern Mississippi, Department of Psychology, Hattiesburg, MS, USA.
J Pain Res. 2020 May 6;13:961-969. doi: 10.2147/JPR.S242126. eCollection 2020.
Native Americans (NAs) have a higher prevalence of chronic pain than other US racial/ethnic groups, but the mechanisms contributing to this pain disparity are under-researched. Pain catastrophizing is one of the most important psychosocial predictors of negative pain outcomes, and the Pain Catastrophizing Scale (PCS) has been established as a reliable and valid measure of the pain catastrophizing construct. However, before the PCS can be used to study pain risk in NAs, it is prudent to first determine whether the established 3-factor structure of the PCS also holds true for NAs.
The current study examined the measurement (configural, metric, and scalar) invariance of the PCS in a healthy, pain-free sample of 138 NA and 144 non-Hispanic white (NHW) participants.
Results suggest that the previously established 3-factor solution fits for both groups (configural invariance) and that the factor loadings were equivalent across groups (metric invariance). Scalar invariance was also established, except for 1 minor scalar difference in a single threshold for item 3 (suggesting NHWs were more likely to respond with a 4 on that item than NAs).
Results provide additional evidence for the psychometric properties of the PCS and suggest it can be used to study pain catastrophizing in healthy, pain-free NA samples.
美国原住民（NA）慢性疼痛的患病率高于美国其他种族/族裔群体，但导致这种疼痛差异的机制研究不足。疼痛灾难化是负面疼痛结果最重要的社会心理预测因素之一，疼痛灾难化量表（PCS）已被确立为疼痛灾难化结构的可靠有效测量工具。然而，在使用PCS研究美国原住民的疼痛风险之前，首先确定PCS既定的三因素结构是否也适用于美国原住民是明智的。
本研究在138名美国原住民和144名非西班牙裔白人（NHW）参与者的健康、无疼痛样本中检验了PCS的测量（构型、度量和标量）不变性。
结果表明，先前确立的三因素解决方案适用于两组（构型不变性），且各因素负荷在两组间相等（度量不变性）。除了项目3的一个单一阈值存在1个较小的标量差异外（表明非西班牙裔白人在该项目上比美国原住民更有可能回答4），还确立了标量不变性。
结果为PCS的心理测量特性提供了更多证据，并表明它可用于研究健康、无疼痛的美国原住民样本中的疼痛灾难化情况。
