Figure 1. KINDL total score, for very preterm born children (FLiP preterm, stratified by gestational age 24–27 weeks or 28–31 weeks) and their fullterm born siblings (FLiP control), as well as age, sex and nationality-matched participants from Ciao Corona (Ciao Corona control). Solid circles indicate participants without chronic health conditions, while empty diamonds indicate those with any chronic health condition, respiratory or non-respiratory. FLiP, Frühgeborenen Lungen Projekt/Premature Infant Lung Project.