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 1

Positive lactose H₂ and/or CH₄ breath test results.

𝑛=24 (9.1%)	H2 breath test	CH4 breath test
𝑛=21 (8.0%)	+	−
𝑛=2 (0.7%)	−	+
𝑛=1 (0.4%)	+	+

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