PDF(Pubmed)
Abstract：
OBJECTIVE: This study aimed to examine if the General Health Questionnaire (GHQ)-12 and Kessler 6 (K6) assess the same underlying construct and to develop a score conversion table for the two scales.
METHODS: A random sample of 4303 people who completed both the GHQ-12 and K6 in 2021 were analyzed. Exploratory bifactor analysis evaluated if both scales measured the same construct, and Rasch analysis assessed item severities. The scales were transformed using Equipercentile equivalence for comparability and score conversion. Agreement was estimated with Cohen\'s Kappa coefficient, along with raw positive and negative agreement.
RESULTS: We found that the two scales measure the same phenomenon to the extent that they can be made equivalent. Conversion tables between GHQ-12 and K6 are presented. Applying the commonly used cut-off of ≥3 on the GHQ-12 bi-modal scoring, we found that the best corresponding cut-off on the K6 would be ≥8. The prevalence of psychological distress was then 22% with GHQ-12% and 21% with K6.
CONCLUSIONS: The GHQ-12 and K6 measure the same construct and corresponding cut-off scores on one scale were found for the other scale. This is valuable for longitudinal studies or time series where one scale has replaced the other scale.
METHODS: A random sample of 4303 people who completed both the GHQ-12 and K6 in 2021 were analyzed. Exploratory bifactor analysis evaluated if both scales measured the same construct, and Rasch analysis assessed item severities. The scales were transformed using Equipercentile equivalence for comparability and score conversion. Agreement was estimated with Cohen\'s Kappa coefficient, along with raw positive and negative agreement.
RESULTS: We found that the two scales measure the same phenomenon to the extent that they can be made equivalent. Conversion tables between GHQ-12 and K6 are presented. Applying the commonly used cut-off of ≥3 on the GHQ-12 bi-modal scoring, we found that the best corresponding cut-off on the K6 would be ≥8. The prevalence of psychological distress was then 22% with GHQ-12% and 21% with K6.
CONCLUSIONS: The GHQ-12 and K6 measure the same construct and corresponding cut-off scores on one scale were found for the other scale. This is valuable for longitudinal studies or time series where one scale has replaced the other scale.
摘要：
目的：本研究旨在检查一般健康问卷（GHQ）-12和Kessler6（K6）是否评估了相同的基础结构，并开发了两个量表的评分转换表。
方法：分析了在2021年同时完成GHQ-12和K6的4303人的随机样本。探索性双因素分析评估两个量表是否测量相同的结构，和Rasch分析评估了项目的严重性。为了可比性和分数转换，使用等效性对量表进行了转换。协议是用科恩的卡帕系数估计的，以及原始的正面和负面协议。
结果：我们发现这两个量表在可以使其等效的程度上测量了相同的现象。给出了GHQ-12和K6之间的转换表。在GHQ-12双峰评分上应用常用的≥3的截止值，我们发现K6的最佳对应截止值为≥8。心理困扰的患病率为22％，GHQ-12％，K6为21％。
结论：GHQ-12和K6在一个量表上测量了相同的结构，并且在另一个量表上发现了相应的截止分数。这对于一个量表取代另一个量表的纵向研究或时间序列是有价值的。
方法：分析了在2021年同时完成GHQ-12和K6的4303人的随机样本。探索性双因素分析评估两个量表是否测量相同的结构，和Rasch分析评估了项目的严重性。为了可比性和分数转换，使用等效性对量表进行了转换。协议是用科恩的卡帕系数估计的，以及原始的正面和负面协议。
结果：我们发现这两个量表在可以使其等效的程度上测量了相同的现象。给出了GHQ-12和K6之间的转换表。在GHQ-12双峰评分上应用常用的≥3的截止值，我们发现K6的最佳对应截止值为≥8。心理困扰的患病率为22％，GHQ-12％，K6为21％。
结论：GHQ-12和K6在一个量表上测量了相同的结构，并且在另一个量表上发现了相应的截止分数。这对于一个量表取代另一个量表的纵向研究或时间序列是有价值的。
