There are less studies on sleep disturbance and limited effective screening and assessment scales for sleep disturbance in Chinese preschoolers.

To assess the reliability and validity of the Chinese version of Sleep Disturbance Scale for Children (SDSC-C) in Chinese preschoolers, providing evidence for expanding the application of SDSC in preschoolers.

By use of convenience sampling, preschool children (3-5 years old) were selected as survey participants for testing the psychometrics of the draft of the SDSC-C from one urban community and one rural community in each of five cities (Fuzhou, Quanzhou, Longyan, Sanming and Nanping) of Fujian Province from June to November 2021 with the assistance of the Fujian Family Planning Association Network, and their parents were selected as their agents to complete the questionnaire survey. Then its items were modified, screened and evaluated by an expert group, after that, the draft was developed into a formal version consisting of six domains and 23 items. The reliability and validity of the scale were assessed by item analysis, reliability analysis, validity analysis, exploratory factor analysis, and confirmatory factor analysis.

The survey obtained a response rate of 92.04% (370/402) . The high-score group〔n=106, ranked the top 27% in terms of total score of SDSC-C (≥49 points) 〕and low-score group〔n=113, ranked the bottom 27% in terms of total score of SDSC-C (≤37 points) 〕divided by critical ratio method had significant differences in the score of each item of the SDSC-C (P<0.05) . The Cronbach's α of the scale was 0.86, with 0.87 of estimating interrater agreement. The I-CVI for each item was >0.78, with kappa values were > 0.74. The S-CVI/UA was 0.87 and S-CVI/Ave was 0.98. For SDSC-C , KMO= 0.85, results of Bartlett's test of sphericity were χ²=3 013.30, P<0.001. By principal component analysis, 7 factors with an engivalue >1 were extracted, explaining 65.125% of the total variance. However, a six-factor solution (i.e. six types of sleep disorder) based on parent-reported sleep disorder symptoms in our study indicated the factor loading of items ranged from 0.34-0.85, which could explain 60.539% of the total variance. The confirmatory factor analysis showed the values of fitting indicator as follows: χ²/DF=2.66, CFI=0.84, TLI=0.81, SRMR=0.08, and RMSEA=0.08.

This study revealed that the SDSC-C is a valid and reliable scale that can provide a comprehensive and detailed assessment of sleep disturbances in Chinese preschool children, which is beneficial to clinicians for early screening and assessment of sleep-related problems in preschool children.

目前我国对学龄前儿童的睡眠障碍研究较少，且缺乏较为有效的量表进行筛查评估。

评价儿童睡眠障碍量表（SDSC）在中国学龄前儿童中的信度和效度，为拓展SDSC的学龄前儿童应用提供参考依据。

于2021年6—11月，通过福建省计划生育协会组织网络，采用便利抽样法，在福建省福州市、泉州市、龙岩市、三明市、南平市分别抽取城市和农村各1个社区的学龄前儿童进行问卷调查。通过课题研究专家组多次讨论，对SDSC条目进行了修改、筛选和评价论证，形成的中文版学龄前SDSC共23个条目、6个维度，通过项目分析、信度分析、效度分析、探索性因子分析、验证性因子分析考评量表的信效度。

共发放调查问卷402份，回收有效问卷370份，有效回收率为92.04%。据中文版学龄前SDSC总分，采用临界比值法将27%作为分割线，前27%为高分组（n=106，≥49分）、后27%为低分组（n=113，≤37分），两组各条目得分比较，差异有统计学意义（P<0.05）。中文版学龄前SDSC的Cronbach's α系数为0.86；中文版学龄前SDSC的评定者间一致性水平为0.87，I-CVI均>0.78，Kappa值均>0.74，S-CVI/UA为0.87，S-CVI/Ave为0.98；中文版学龄前SDSC KMO=0.85，Bartlett's球形检验χ²=3 013.30，P<0.001。采用主成分法共提取出7个特征根>1的公因子，可解释总变异的65.125%；采用原量表6公因子结构可解释总变异的60.539%，各条目的因子负荷为0.34~0.85。验证性因子分析显示，χ²/DF=2.66，CFI=0.84，TLI=0.81，SRMR=0.08，RMESA=0.08。

中文版学龄前SDSC问卷具有良好的信效度和适用性，能够全面、详细地评估学龄前儿童的睡眠障碍，有利于临床医生早期筛查评估学龄前儿童的睡眠相关问题。