highly significantp =4x10 -8
There was low between-study heterogeneity ( I 2 =32·8%: p =0·13), and the overall association of short sleep with diabetes risk was highly significant (OR=1·33 [95%CI: 1·20, 1·48); p =4x10 -8 ), with no evidence of publication bias (Egger’s test p =0·15).