Abstract Background Previous studies have suggested that the atopy patch test (APT) may make oral challenge superfluous in diagnosing children with food hypersensitivity. Objective To investigate the clinical relevance of APT in predicting hypersensitivity to cow's milk and hen's egg in 486 unselected children 3 years of age. Method The children were examined by APT, skin prick (SPT), histamine release (HR), and specific IgE followed by oral challenge when hypersensitivity to cow's milk or hen's egg was suspected. Results Food hypersensitivity confirmed by oral challenge was 1.6% to hen's egg and 0.6% to cow's milk. No hypersensitivity to cow's milk or hen's egg was predicted by APT alone. Conclusion APT could not predict food hypersensitivity not predicted by SPT, HR, or specific IgE. Thus, APT cannot be recommended in daily practice for the diagnosis of hypersensitivity to cow's milk and hen's egg in children 3 years of age.