Fig. 3

a Estimated Marginal Means for Spin the Pots task at 30 months, for each sleep group at 6 months. This graph represents the Estimated Marginal Means for Working Memory at 30 months, for each sleep variable based on the 10th, 10-90th and 90th percentiles, at 6 months). Y axis represents the estimated marginal means for the working memory measure at 30 months and X axis the three sleep groups. Error bars represent the 95% Confidence Interval. The sleep variables represented here are: nighttime sleep duration (A), daytime sleep duration (B), total sleep duration (C), proportion of daytime sleep (D), number of night awakenings per night (E) and time awake during night (F). At 6 months we can observe that almost all the relations between sleep and WM are linear (A-E), while an inverted U-shaped association between time spent awake at night (F) and WM was reported. b Estimated Marginal Means for Spin the Pots task at 30 months, for each sleep group at 12 months. This graph represents the Estimated Marginal Means for Working Memory at 30 months, for each sleep variable based on the 10th, 10-90th and 90th percentiles, at 12 months). Y axis represents the estimated marginal means for the working memory measure at 30 months and X axis the three sleep groups. Error bars represent the 95% Confidence Interval. The sleep variables represented here are: nighttime sleep duration (G), daytime sleep duration (H), total sleep duration (I), proportion of daytime sleep (J), number of night awakenings per night (K) and time awake during night (L). At 12 months, linear associations were only found in total sleep duration (I) and time awake at night (L), with a tendency towards linearity in number of night awakenings (K). The associations between nighttime sleep duration (G), daytime sleep duration (H) and proportion of daytime sleep duration (J) with WM at 30 months follow an inverted U-shaped association