b) missing risk and/or consent data (n = 25); and c) no consent obtained after administration of the SPARK (n = 106)). Children for whom no SPARK was received, or an almost empty SPARK with the comment ‘no contact wanted by parents’, were counted as a non-response. From the remaining 1721 children, self-report questionnaires were returned for 1152 children (66.9%). Characteristics of the study population are described in Table Table1.1. Administration of the SPARK took on average 29 minutes (standard deviation 11 min.). Table Table22 shows scores per domain on parents’ concerns, needs assessment by parents and professional.