Evidence check: HLA-DQ2 in the context of Schlaf

The query asks about HLA-DQ2 in the context of sleep. HLA-DQ2 is a genetic variant strongly associated with celiac disease. There is no direct, evidence-based link between HLA-DQ2 and sleep quality or sleep disorders. Indirectly, undiagnosed celiac disease could affect sleep through symptoms like abdominal pain, fatigue, or nutrient deficiencies, but this is not specific to HLA-DQ2. The evidence level is 'unclear' or 'mechanistic': plausible mechanisms exist (e.g., inflammation-related sleep disruption), but no robust clinical studies demonstrate a direct causal relationship. MyBody-X tests analyzing HLA-DQ2 should not be used for sleep diagnostics. Caveat: A positive HLA-DQ2 finding without a celiac diagnosis has no established clinical relevance for sleep issues.