Table 3.

Low reactors versus high reactors.

	Strong allergen concentration (Dil 1, 2, 3)	Weak allergen concentration (Dil 4, 5, 6)	Totals
A (2010)	277 (97%)	8 (3%)	285
B (2015)	743 (75%)∗∗	244 (25%)∗∗	987

Dil 1, 2, 3: first to third dilutions from the extract (1 : 5; 1 : 25; 1 : 125). These have a stronger allergen concentration.

Dil 4, 5, 6: fourth to sixth dilution form the extract (1 : 625; 1 : 3125; 1 : 15625). These have a weaker allergen concentration.

Totals: total number of positive mold tests in 100 tests (or 1800 individual mold tests).

A (2010): Group A, including tests performed in or before 2010.

B (2015): Group B, including tests performed in 2014 and 2015.

^∗∗ p < 0.0001.