Women's Health Research Laboratory (LAMU), Physical Therapy Department, UFSCar, São Carlos, SP, Brazil.
Study Group on Chronic Pain (NEDoC), Laboratory of Research on Electrophysical Agents (LAREF), Department of Physical Therapy, Universidade Federal de São Carlos (UFSCar), São Carlos, SP, Brazil.
BMC Womens Health. 2022 Sep 7;22(1):370. doi: 10.1186/s12905-022-01945-1.
To verify the use of pain drawing to assess multisite pain in with primary dysmenorrhea (PD) and to assess its divergent validity, test-retest reliability, intra- and inter-rater reliability and measurement errors.
Cross-sectional study. Adult women with self-reported PD three months prior to the study. Women answered the Numerical Rating Scale (NRS) and the pain drawing during two consecutive menstruations. The pain drawings were digitalized and assessed for the calculation of total pain area (%). Intra- and inter-rater reliability and the test-retest reliability between the first and the second menstruations were assessed with the intraclass correlation coefficient (ICC). Measurement errors were calculated with the standard error of measurement (SEM), smallest detectable change (SDC) and the Bland-Altman plot. Spearman correlation (rho) was used to check the correlation between the total pain area and pain intensity of the two menstruations.
Fifty-six women (24.1 ± 3.1 years old) participated of the study. Their average pain was 6.2 points and they presented pain in the abdomen (100%), low back (78.6%), head (55.4%) and lower limbs (50%). All reliability measures were considered excellent (ICC > 0.75) for the total pain area; test-retest SEM and SDC were 5.7% and 15.7%, respectively. Inter-rater SEM and SDC were 8% and 22.1%, respectively. Correlation between total pain area and pain intensity was moderate in the first (rho = 0.30; p = 0.021) and in the second menstruations (rho = 0.40; p = 0.002).
Women with PD presented multisite pain, which could be assessed with the pain drawing, considered a reliable measurement.
为了验证疼痛绘图在原发性痛经（PD）中评估多部位疼痛的有效性，并评估其发散效度、重测信度、组内和组间信度以及测量误差。
这是一项横断面研究。纳入在研究前三个月有自我报告 PD 的成年女性。女性在连续两个月经周期内回答数字评分量表（NRS）和疼痛绘图。对疼痛绘图进行数字化，并计算总疼痛面积（%）以进行评估。使用组内相关系数（ICC）评估第一次和第二次月经之间的组内和组间信度和重测信度。使用测量误差的标准误差（SEM）、最小可检测变化（SDC）和 Bland-Altman 图来计算测量误差。使用 Spearman 相关系数（rho）来检查两次月经期间总疼痛面积与疼痛强度之间的相关性。
56 名女性（24.1±3.1 岁）参与了研究。她们的平均疼痛评分为 6.2 分，疼痛部位包括腹部（100%）、下背部（78.6%）、头部（55.4%）和下肢（50%）。总疼痛面积的所有可靠性测量均被认为是优秀的（ICC>0.75）；重测 SEM 和 SDC 分别为 5.7%和 15.7%。组内信度 SEM 和 SDC 分别为 8%和 22.1%。第一次和第二次月经期间总疼痛面积与疼痛强度之间的相关性为中度（rho=0.30；p=0.021）和（rho=0.40；p=0.002）。
PD 女性表现出多部位疼痛，可以使用疼痛绘图进行评估，认为是可靠的测量方法。
