Several studies show that small children cared for outside the home, especially in poor quality care and for 30 or more hours per week, have higher levels of cortisol than children at home.

Artificial intelligence may soon play a critical role in choosing which depression therapy is best for patients.

The risk of ADHD was 34 percent higher in children whose mother had a vitamin D deficiency during pregnancy than in those children whose mother's vitamin D level was sufficient during the first and second trimesters. The result was adjusted for maternal age, socioeconomic status and psychiatric history.

Children diagnosed with ADHD inconsistently take their prescribed medication, going without treatment 40 per cent of the time, a new study has found.