IL1B and Prader-Willi syndrome: There were significantly higher levels of IL-1β (0.4 ± 0.2 vs. 0.2 ± 0.1 pg/ml, p < 0.001) and IL-13 (2.9 ± 1.4 vs. 1.5 ± 0.6 pg/ml, p < 0.001) in patients with PWS compared to HCs (Table 2).