not quite significantp = 0.526
The 2nd versus 1st quartiles of the di- ortho congeners [OR = 0.27 (95% CI: 0.10, 0.74)] was significant but inverse while the difference between the 4th versus 1st quartiles of the tri- and tetra- ortho congeners [OR = 2.90 (95% CI: 0.99, 8.51)] was positive and not quite significant ( p = 0.526).