CD79A and hyperinsulinemic hypoglycemia, familial, 4: In logistic regression corrected for age and multiple comparisons, IgA (OR 0.16 [0.06–0.37]) and total IgG deficiency (OR 0.15 [0.02–0.74]) were less prevalent in M.pneumoniae carriers (n = 78) compared to non-carriers (n = 36).