Internalizing problems before and during the COVID-19 pandemic in independent samples of Dutch children and adolescents with and without pre-existing mental health problems

Abstract The aim of the study was to assess internalizing problems before and during the pandemic with data from Dutch consortium Child and adolescent mental health and wellbeing in times of the COVID-19 pandemic, consisting of two Dutch general population samples (GS) and two clinical samples (CS) referred to youth/psychiatric care. Measures of internalizing problems were obtained from ongoing data collections pre-pandemic ( N GS = 35,357; N CS = 4487) and twice during the pandemic, in Apr–May 2020 ( N GS = 3938; clinical: N CS = 1008) and in Nov–Dec 2020 ( N GS = 1489; N CS = 1536), in child... Mehr ...