Fig. 1From: Bidirectional relationship between nocturnal subjective sleep duration and cognitive performance in Chinese over 45 years old: a national representative longitudinal studyFour-waves Random Intercept Cross-Lagged Panel Model: a, cross-sectional paths; b, autoregressive paths; c, cross-lagged paths; d, correlation between stable traits of night sleep duration and cognitive performance at the interindividual level. Circles represent “latent” variables, square denote observed variablesBack to article page