highly significantp < 0.001
For chronic NOEC REACH data (European Commission 2006), the relationship with the chronic high‐quality nonextrapolated SSD midpoint data was less strong than for the EC50 data but still highly significant (A; overlapping number of compounds 251, y = 0.7448 x + 0.8502, R 2 = 0.60, p < 0.001).