Department of Personality, Assessment and Psychological Treatment, University of Malaga, Malaga, Spain.
Andalusian Group of Psychosocial Research (GAP), Andalucía, Spain.
Acta Psychiatr Scand. 2022 Jun;145(6):640-655. doi: 10.1111/acps.13417. Epub 2022 Mar 2.
We report the psychometric properties of the Patient-Reported Impact of Symptoms in Schizophrenia Scale (PRISS), which assesses the impact of subjective experiences or qualia in outpatients with this condition.
A cross-sectional study was carried out in 162 patients diagnosed with schizophrenia in Spain. The PRISS measures the presence, frequency, concern and interference with daily life of self-reported experiences related to the main symptoms observed in these patients. The psychometric analysis included test-retest reliability, internal consistency and structural and convergent validity.
The 28-item PRISS showed good test-retest reliability as 64.3% of the intraclass correlation coefficient values were between 0.40 and 0.79, which were statistically significant (p < 0.01). Analysis of the structural validity revealed a three-factor structure, (1) productive subjective experiences, (2) affective-negative subjective experiences and (3) excitation, which accounted for 56.11% of the variance. Of the Pearson's correlation coefficients analysed between the PRISS and the Positive and Negative Syndrome Scale (PANSS), Scale for Assessment of Negative Symptoms (SANS) and World Health Organization Disability Assessment Schedule (WHO-DAS), 72.2% were statistically significant (p < 0.05) and ranged from 0.38-0.42, 0.32-0.42 and 0.40-0.42, respectively.
Our results indicate that the PRISS appears to be a brief, reliable and valid scale to measure subjective experiences in schizophrenia and provides valuable information complementary to clinical evaluation.
我们报告了精神分裂症患者报告的症状影响量表（PRISS）的心理测量特性，该量表评估了这种情况下门诊患者主观体验或质的影响。
在西班牙对 162 名被诊断为精神分裂症的患者进行了横断面研究。PRISS 测量了与这些患者观察到的主要症状相关的自我报告体验的存在、频率、关注和对日常生活的干扰。心理测量分析包括重测信度、内部一致性以及结构和收敛效度。
28 项 PRISS 表现出良好的重测信度，因为 64.3%的组内相关系数值在 0.40 到 0.79 之间，具有统计学意义（p<0.01）。结构有效性分析显示出三因素结构，（1）生产性主观体验，（2）情感-消极主观体验和（3）兴奋，这三个因素占方差的 56.11%。在 PRISS 与阳性和阴性综合征量表（PANSS）、负面症状评定量表（SANS）和世界卫生组织残疾评估量表（WHO-DAS）之间分析的皮尔逊相关系数中，72.2%具有统计学意义（p<0.05），范围从 0.38 到 0.42，0.32 到 0.42 和 0.40 到 0.42。
我们的结果表明，PRISS 似乎是一种简短、可靠和有效的量表，可以衡量精神分裂症患者的主观体验，并提供对临床评估有价值的补充信息。
