IL6 and attention deficit-hyperactivity disorder: Further, we observed an indirect effect of IL‐6 at 9 years in the association between regular sleep routines at 3.5 years and probable ADHD diagnosis at 10 years (β = −.002; 95% CI = −0.003 to −0.001, p = .006, 16.7% of the total effect was mediated by IL‐6 at 9 years) and between higher night awakening frequency at 3.5 years and probable ADHD diagnosis at 10 years (β = .002; 95% CI = 0.001 to 0.003, p = .006; 3.7% of the total effect was mediated by IL‐6 at 9 years).