From post- +‎ challenge.

postchallenge (not comparable)

1. Following a (metabolic) challenge
   • 2015 August 14, David Preiss et al., “Prospective relationships between body weight and physical activity: an observational analysis from the NAVIGATOR study”, in BMJ Open‎^[1], volume 5, →DOI:

     Detailed inclusion and exclusion criteria are provided in previous publications. 9–11 Participants underwent a 75 g oral glucose tolerance test and IGT was defined as a 2 h postchallenge glucose value of 7.8–11.0 mmol/L (with fasting plasma glucose 5.3–6.9 mmol/L).