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. 2020 Mar 25;54(9):680–690. doi: 10.1093/abm/kaaa012

Table 3.

Correlations between sleep and eating patterns with mood in a sample of 29 eating disorder patients

MADRS YMRS SOFAS CUXOS EDEQ total rRSTQ CTQ total
CenDI −0.076 0.11 0.028 −0.007 0.14 −0.013 −0.314
SD −0.17 0.24 −0.29 0.092 0.096 −0.11 0.019
ConDI 0.062 −0.19 −0.081 −0.23 0.004 −0.31 −0.31
SD −0.10 0.21 0.02 0.079 0.13 0.14 0.091
Onset −0.13 0.004 0.035 −0.063 −0.12 0.025 −0.51*
SD 0.34 0.16 −0.23 0.19 0.27 0.016 0.030
Offset 0.023 0.016 −0.093 0.19 0.39* 0.20 0.023
SD −0.015 0.27 0.082 −0.12 −0.077 −0.006 0.26
Nighttime sleep 0.093 −0.14 −0.13 0.25 0.26 0.077 0.32
SD 0.30 0.25 −0.19 0.22 0.53** 0.18 0.13
Frequency −0.36* −0.20 0.39* −0.25 −0.42* −0.077 0.15
IFRQ −0.27 0.045 0.15 −0.040 −0.33 0.13 0.43*
ITIM −0.18 0.15 0.012 0.13 0.25 0.18 0.098
IINT 0.006 0.002 −0.16 0.034 0.20 0.14 −0.036

CenDI = angle of the midpoint of sleep as reflecting chronotype; SD = standard deviation as a descriptor of variance in each measure; ConDI = vector length of the mean midpoint of sleep during 24 hr, normalized for the length of sleep; Onset = mean sleep onset in hours; Offset = mean sleep offset in hours; Nighttime sleep = mean total nighttime sleep in minutes; Frequency = the daily number of meals (any eating occasions during the day). IFRQ = the SD of the daily number of meals (SD of meal frequency). ITIM = the SD of the daily timing of meals. We determined ITIM by calculating the SDs of each daily meal and, then, by averaging these SDs. IINT is the SD of the intermeal interval. For this index, we first calculated the SDs of the intervals between each consecutive daily meal and, then, averaged these SDs.

MADRS, Montgomery–Åsberg Depression Scale total score; YMRS, Young Mania Rating Scale total score; SOFAS, Social and Occupational Functional Assessment Scale; EDEQ, Eating disorder examination questionnaire total score; CUXOS, Clinically Useful Anxiety Outcome Scale self-rating scale total score; rRSTQ, Revised Reinforcement Sensitivity Theory Questionnaire total score; CTQ, the Childhood Trauma Questionnaire total score of Items 1–7.

*p-value 0.01 to 0.05.

**p-value <0.01.