Lactose Malabsorption Testing in Daily Clinical Practice: A Critical Retrospective Analysis and Comparison of the Hydrogen/Methane Breath Test and Genetic Test (C/T₋₁₃₉₁₀ Polymorphism) Results

Table 3

Reported symptoms during the lactose H₂/CH₄ breath test.

	𝑛=263
	H2/CH4 breath test^+	H2/CH4 breath test^−
Symptoms^+	16 (6.1%)	41 (15.6%)
Symptoms^−	8 (3%)	198 (75.3%)

+: >20 parts per million above baseline during the colon passage (60–120 minutes), −: negative.