The incidence of vitiligo in the Danish population was determined to be a little above 1% (1.44%), from the examination of a total of 691 admissions during one day of November 1968 to the Glostrup Hospital.
We have tried to clarify the correlation between vitiligo and pernicious anemia by studying more comprehensive series of patients.
Among 84 patients with pernicious anemia, a total of nine cases (10.6%) were found.
Out of 135 patients with vitiligo, five had pernicious anemia (3.7%), while, in the Danish general population, an incidence of pernicious anemia of 0.13% is reported.
It is concluded that such a pronounced relationship may support the theory that vitiligo belongs to the group of autoimmune disorders.
Grunnet I, Howitz J, Reymann F, Schwartz M. Vitiligo and Pernicious Anemia. Arch Dermatol. 1970;101(1):82-85. doi:10.1001/archderm.1970.04000010084015