CONTEXT: Patients with schizophrenia have an increased risk of type 2 diabetes mellitus. However, very few studies have dealt with the association of type 1 diabetes and schizophrenia. Preliminary evidence points to a possible inverse association. OBJECTIVE: To investigate the incidence of schizophrenia in a nationwide cohort of patients with type 1 diabetes born in 1950 through 1959 in Finland. DESIGN: A cohort study of individuals born in 1950 through 1959 with a follow-up of 1969 through 1991. SETTING: Finland. PATIENTS: All individuals born in 1950 through 1959 with type 1 diabetes were identified through nationwide registers. The incidence of schizophrenia until 1992 among the total 1950-1959 cohort and in individuals with type 1 diabetes was calculated using information from 3 health care registers. MAIN OUTCOME MEASURE: Incidence of schizophrenia. RESULTS: The incidence of schizophrenia was 0.21 per 10 000 person-years in the group with type 1 diabetes and 0.56 per 10 000 person-years in the group without type 1 diabetes (P < .001). CONCLUSION: The incidence of schizophrenia is decreased in patients with type 1 diabetes.
CONTEXT: Patients with schizophrenia have an increased risk of type 2 diabetes mellitus. However, very few studies have dealt with the association of type 1 diabetes and schizophrenia. Preliminary evidence points to a possible inverse association. OBJECTIVE: To investigate the incidence of schizophrenia in a nationwide cohort of patients with type 1 diabetes born in 1950 through 1959 in Finland. DESIGN: A cohort study of individuals born in 1950 through 1959 with a follow-up of 1969 through 1991. SETTING: Finland. PATIENTS: All individuals born in 1950 through 1959 with type 1 diabetes were identified through nationwide registers. The incidence of schizophrenia until 1992 among the total 1950-1959 cohort and in individuals with type 1 diabetes was calculated using information from 3 health care registers. MAIN OUTCOME MEASURE: Incidence of schizophrenia. RESULTS: The incidence of schizophrenia was 0.21 per 10 000 person-years in the group with type 1 diabetes and 0.56 per 10 000 person-years in the group without type 1 diabetes (P < .001). CONCLUSION: The incidence of schizophrenia is decreased in patients with type 1 diabetes.
Authors: Hreinn Stefansson; Roel A Ophoff; Stacy Steinberg; Ole A Andreassen; Sven Cichon; Dan Rujescu; Thomas Werge; Olli P H Pietiläinen; Ole Mors; Preben B Mortensen; Engilbert Sigurdsson; Omar Gustafsson; Mette Nyegaard; Annamari Tuulio-Henriksson; Andres Ingason; Thomas Hansen; Jaana Suvisaari; Jouko Lonnqvist; Tiina Paunio; Anders D Børglum; Annette Hartmann; Anders Fink-Jensen; Merete Nordentoft; David Hougaard; Bent Norgaard-Pedersen; Yvonne Böttcher; Jes Olesen; René Breuer; Hans-Jürgen Möller; Ina Giegling; Henrik B Rasmussen; Sally Timm; Manuel Mattheisen; István Bitter; János M Réthelyi; Brynja B Magnusdottir; Thordur Sigmundsson; Pall Olason; Gisli Masson; Jeffrey R Gulcher; Magnus Haraldsson; Ragnheidur Fossdal; Thorgeir E Thorgeirsson; Unnur Thorsteinsdottir; Mirella Ruggeri; Sarah Tosato; Barbara Franke; Eric Strengman; Lambertus A Kiemeney; Ingrid Melle; Srdjan Djurovic; Lilia Abramova; Vasily Kaleda; Julio Sanjuan; Rosa de Frutos; Elvira Bramon; Evangelos Vassos; Gillian Fraser; Ulrich Ettinger; Marco Picchioni; Nicholas Walker; Timi Toulopoulou; Anna C Need; Dongliang Ge; Joeng Lim Yoon; Kevin V Shianna; Nelson B Freimer; Rita M Cantor; Robin Murray; Augustine Kong; Vera Golimbet; Angel Carracedo; Celso Arango; Javier Costas; Erik G Jönsson; Lars Terenius; Ingrid Agartz; Hannes Petursson; Markus M Nöthen; Marcella Rietschel; Paul M Matthews; Pierandrea Muglia; Leena Peltonen; David St Clair; David B Goldstein; Kari Stefansson; David A Collier Journal: Nature Date: 2009-07-01 Impact factor: 49.962