Investigating ethnic variations in reporting of psychotic symptoms: a multiple-group confirmatory factor analysis of the Psychosis Screening Questionnaire
Investigating ethnic variations in reporting of psychotic symptoms: a multiple-group confirmatory factor analysis of the Psychosis Screening Questionnaire
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DOI：
10.1017/s0033291718000399
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发表时间：
2018-12-01
影响因子：
6.9
通讯作者：
Rai, Dheeraj
中科院分区：
文献类型：
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作者：
Heuvelman, Hein;Nazroo, James;Rai, Dheeraj
背景。流行病学证据表明，在西方国家，精神病的风险因种族而异。然而，迄今为止，几乎没有证据表明用于此类比较的筛选工具的跨文化有效性。方法。结合两个现有的英国人口队列，我们检查了英国白人 (n = 3467)、爱尔兰白人 (n = 851)、加勒比人 (n = 1899)、印度人 (n = 2590)、巴基斯坦人 (n = 1956) 和孟加拉国人 (n = 1248) 报告精神病症状的风险。我们通过多组验证性因子分析评估了精神病筛查问卷（PSQ）的心理测量特性，在测量非不变性分析中评估了因子负荷、反应阈值和残差方差的等效性。结果。与英国白人的患病率 (5.4%) 相比，加勒比海地区自我报告的精神病症状的患病率更高（12.7%，调整后 OR = 2.38 [95% CI 1.84-3.07]）。巴基斯坦人的患病率也有所增加（8.3%，调整后 OR = 1.36 [1.01-1.84]），尽管这种差异是由于报告偏执症状的可能性更大所致。不同种族群体以相同的方式测量了关于思想干扰、奇怪经历和幻觉的 PSQ 项目。然而，我们的测量模型表明，少数民族中偏执症状的测量可靠性低于英国白人，并且在不考虑测量非不变性的情况下，似乎夸大了巴基斯坦人和英国白人群体之间的潜在差异。结论。尽管有证据表明测量的非不变性，但加勒比地区个体报告精神病症状的较高风险不太可能是测量的人为因素。少数族裔受访者中偏执症状记录的残余差异较大，因此在使用该项目调查精神病风险的种族差异时需要谨慎。
Background. Epidemiological evidence suggests risk for psychosis varies with ethnicity in Western countries. However, there is little evidence to date on the cross-cultural validity of screening instruments used for such comparisons.Methods. Combining two existing UK population-based cohorts, we examined risk for reporting psychotic symptoms across White British (n = 3467), White Irish (n = 851), Caribbean (n = 1899), Indian (n = 2590), Pakistani (n = 1956) and Bangladeshi groups (n = 1248). We assessed the psychometric properties of the Psychosis Screening Questionnaire (PSQ) with a multiple-group confirmatory factor analysis, assessing the equivalence of factor loadings, response thresholds and residual variances in an analysis of measurement non-invariance.Results. Compared with prevalence among British Whites (5.4%), the prevalence of self-reported psychotic symptoms was greater in the Caribbean group (12.7%, adjusted OR = 2.38 [95% CI 1.84-3.07]). Prevalence was also increased among Pakistani individuals (8.3%, adjusted OR = 1.36 [1.01-1.84]) although this difference was driven by a greater likelihood of reporting paranoid symptoms. PSQ items for thought interference, strange experience and hallucination were measured in equivalent ways across ethnic groups. However, our measurement models suggested that paranoid symptoms were measured less reliably among ethnic minorities than among British Whites and appeared to exaggerate latent differences between Pakistani and White British groups when measurement non-invariance was not accounted for.Conclusions. Notwithstanding evidence for measurement non-invariance, the greater risk for reporting psychotic symptoms among Caribbean individuals is unlikely to be an artefact of measurement. Greater residual variance in the recording of paranoid symptoms among ethnic minority respondents warrants caution in using this item to investigate ethnic variation in psychosis risk.