Association Between Sleep and Psychomotor Development in Early Childhood

Actigraphy is a validated complementary means of diagnosis, the gold standard for the assessment of circadian rhythm.

Assessment scale for skills in child development from 0 to 6 years.

Questionnaire for assessing sleep habits, validated for the Portuguese population (4) which allows us to understand the sleep hygiene habits of the child

Melatonin will be measured in the first-morning urine and it is considered to be a good marker of plasma MLT level since its concentration is highly correlated with nocturnal plasma melatonin.