Work Package 6 involved a systematic review, which aimed to identify and describe the methods that have been used to value children’s health states and the specific issues that arise in the use of these methods. The review has confirmed that there has been a wide range of methods used and perspectives adopted by studies valuing child health. This includes whether values were sought from children or adults. Furthermore, adult and child participants may be asked to make the valuation by thinking of their own health or the health of others. In the case of adults they may be asked to think of their child or another child they know or a child they do not know. Similarly, methods employed are highly varied across the studies. As a consequence of these differences in combination with selective reporting, it has not been possible to draw meaningful observations on the most appropriate or reliable methods.