marginally significant tendencyP = 0.078
The equivalent analyses for mean diclofenac concentrations in those samples with detectable levels indicated that concentrations were also lower in T3 than in T1 ( T + = 27, N = 7, one-tailed P = 0.016), and had a marginally significant tendency to be lower in T3 than T2 ( T + = 18, N = 6, one-tailed P = 0.078).