Table 2. Associations between schizophrenia polygenic risk (pT 0.05) and sleep outcomes.

Sleep phenotype (units)	Beta or OR	95% CI	R-squared 1	P-value
Sleep duration in children (seconds) 2	-44.52	-88.98, -0.07	0.0002	0.05
Nightmares in children (ordinal, OR)	1.08	1.01, 1.14	0.001	0.02
Sleep duration in mothers (seconds)	-49.97	-150.48, 50.55	0.0003	0.33

¹The r-squared values were a marginal r-squared (the proportion of variance explained by the fixed effects) for sleep duration in children, Nagelkerke’s pseudo r-squared for nightmares and the r-squared for sleep duration in mothers. ²For this analysis we combined all time points into one stacked dataset in a linear mixed-effects model, resulting in 28,138 data points in the model.