Figures & data
Table 1 Descriptive Statistics of the Sample
Table 2 Factor Loadings of the Single Items Onto the PDSS
Figure 1 Frequency distribution of PDSS-RUS scores in full sample (A), elementary school (B), middle school (C), and high school (D).
![Figure 1 Frequency distribution of PDSS-RUS scores in full sample (A), elementary school (B), middle school (C), and high school (D).](/cms/asset/87c7005a-535d-4dd5-b23a-e4089221a025/dnss_a_12174126_f0001_c.jpg)
Table 3 Sleep Variables of Schoolchildren in Various Grades
Table 4 Correlations Between PDSS Scores and Sleep-Wake Variables
Figure 2 Relationship between daytime sleepiness (PDSS score) and chronotype (MSFsc) and Social Jetlag.
![Figure 2 Relationship between daytime sleepiness (PDSS score) and chronotype (MSFsc) and Social Jetlag.](/cms/asset/2e784559-6ee5-4c1c-91cc-69f73c1d76df/dnss_a_12174126_f0002_b.jpg)
Table 5 Factors Affecting Daytime Sleepiness in Russian School Children, with PDSS Score as Dependent Variable and Age, Sex, Social Jetlag, Average Sleep Duration and Midpoint of Sleep as Independent Variables