a trend toward significancep = 0.074
When the sample was stratified into groups of ≤ 13 years (very early onset; N = 4, 180.5 [135–464] days); ≥ 13–17 years (N = 54, 76 [30–170] days) and AOP (58 [21–140] days), there was also a trend toward significance in median DUP (χ 2 = 5.203, p = 0.074).