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. Author manuscript; available in PMC: 2021 Jul 1.
Published in final edited form as: Sleep Med. 2020 Feb 28;71:1–7. doi: 10.1016/j.sleep.2020.02.018

Table 2.

Comparison of neurotransmitter levels and working memory functions

Longer sleep duration (n = 79) Shorter sleep duration (n = 74) t p
Neurometabolite levels
 GABA (i.u.) 2.012 ± 0.212 1.932 ± 0.206 −2.21 0.03
 Glx (i.u.) 4.748 ± 0.600 4.746 ± 0.472 −0.20 0.84
Neuropsychological measures
 SWM, total errors (score) 53.3 ± 61.3 57.4 ± 63.5 0.71 0.48
 SWM, strategy (score) 37.0 ± 25.9 39.4 ± 27.1 0.71 0.48

Data are presented as mean ± standard deviation, which are available in 153 participants.

Neurotrasmitter levels are tissue-corrected values.

The t and p values are derived from the multivariate regression model including the following variables: GABA, Glx levels, SWM total error and strategy scores as dependent variables; sleep duration group as an independent variable; age, sex, and total PSQI score as covariates.

GABA, gamma-aminobutyric acid; Glx, glutamate+glutamine; SWM, Spatial working memory task.