Table 1.

Mean response differences across concentrations

Hypothesis	Number of families/ related/unrelated	P-value
LA 0% = LA 0.06%	145/598/339	0.00360*
LA 0% = LA 0.15%	146/603/340	5.06E−26*
LA 0% = LA 0.38%	149/612/331	5.37E−23*
LA 0.06% = LA 0.15%	148/609/337	4.46E−13*
LA 0.15% = LA 0.38%	151/619/331	8.64E−29*

Mean response differences were assessed for each concentration combination.

*Significant at α < 0.05.