IL1B and Prader-Willi syndrome: Analysis of bivariate correlations (Table 3) revealed significant positive correlations between the levels of IL-1β and scores of the following CBCL domains: withdrawn/depressed (r = 0.515, p = 0.001), social problems (r = 0.623, p < 0.001), thought problems (r = 0.530, p < 0.001), attention problems (r = 0.650, p < 0.001), delinquent (r = 0.588, p < 0.001) and aggressive behaviour (r = 0.518, p = 0.001) in PWS children.