Self-reported sitting time and prevalence of erectile dysfunction in Japanese patients with type 2 diabetes mellitus: The Dogo Study.
No evidence exists regarding the association between sitting time and erectile dysfunction (ED) among patients with type 2 diabetes mellitus. The aim of this study was to evaluate the association between self-reported sitting time and ED among patients with type 2 diabetes mellitus.



Study subjects were 430 male Japanese patients with type 2 diabetes mellitus (mean age, 60.5years). A self-administered questionnaire was used to collect information on the variables under study. The study subjects were asked about time spent sitting during typical 24-hour periods over the past 12months. Subjects were divided into four groups according to self-reported sitting time: 1) <5hours, 2) 5-7hours, 3) 7-9hours, and 4) ≥9hours. ED was defined as present when a subject had a Sexual Health Inventory for Men score <8. Adjustment was made for age, body mass index, duration of type 2 diabetes, current smoking, current drinking, hypertension, coronary artery disease, stroke, glycated hemoglobin, walking habit, and diabetic neuropathy.



The prevalence values of moderate to severe ED and severe ED were 36.1% and 49.8%. At least 9hours sitting was independently positively associated with severe ED but not moderate to severe ED; the adjusted OR was 1.84 (95% CI: 1.06-3.33). In the multivariate model, there was a statistically significant inverse exposure-response relationship between the self-reported sitting time and severe ED (p for trend=0.029).



Self-reported sitting time may be positively associated with ED in Japanese patients with type 2 diabetes mellitus.
Department of Epidemiology and Preventive Medicine, Ehime University Graduate School of Medicine, Ehime, Japan; Epidemiology and Medical Statistics Unit, Translational Research Center, Ehime University Hospital, Ehime, Japan. Electronic address: shinya.furukawa@gmail.com.
Shinya
S
Furukawa
Department of Internal Medicine, Yawatahama General City Hospital, Ehime, Japan.
Takenori
T
Sakai
Department of Internal Medicine, Matsuyama Shimin Hospital, Ehime, Japan.
Tetsuji
T
Niiya
Department of Internal Medicine, Saiseikai Matsuyama Hospital, Ehime, Japan.
Hiroaki
H
Miyaoka
Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Ehime, Japan.
Teruki
T
Miyake
Department of Lifestyle-related Medicine and Endocrinology, Ehime University Graduate School of Medicine, Ehime, Japan.
Shin
S
Yamamoto
Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Ehime, Japan.
Sayaka
S
Kanzaki
Department of Public Health, Juntendo University School of Medicine, Tokyo, Japan.
Koutatsu
K
Maruyama
Department of Epidemiology and Preventive Medicine, Ehime University Graduate School of Medicine, Ehime, Japan; Epidemiology and Medical Statistics Unit, Translational Research Center, Ehime University Hospital, Ehime, Japan.
Keiko
K
Tanaka
Department of Internal Medicine, Ehime Prefectural Central Hospital, Ehime, Japan.
Teruhisa
T
Ueda
Department of Epidemiology and Preventive Medicine, Ehime University Graduate School of Medicine, Ehime, Japan.
Hidenori
H
Senba
Department of Internal Medicine, Saiseikai Saijo Hospital, Ehime, Japan.
Masamoto
M
Torisu
Department of Internal Medicine, Ehime Niihama Hospital, Ehime, Japan.
Hisaka
H
Minami
Department of Lifestyle-related Medicine and Endocrinology, Ehime University Graduate School of Medicine, Ehime, Japan.
Takeshi
T
Tanigawa
Department of Lifestyle-related Medicine and Endocrinology, Ehime University Graduate School of Medicine, Ehime, Japan.
Bunzo
B
Matsuura
Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Ehime, Japan.
Yoichi
Y
Hiasa
Department of Epidemiology and Preventive Medicine, Ehime University Graduate School of Medicine, Ehime, Japan; Epidemiology and Medical Statistics Unit, Translational Research Center, Ehime University Hospital, Ehime, Japan.
Yoshihiro
Y
Miyake
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003924:Diabetes Mellitus, Type 2 / Q000150:complications* / Q000453:epidemiology*; D007172:Erectile Dysfunction / Q000150:complications / Q000453:epidemiology*; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D011187:Posture / Q000502:physiology*; D015995:Prevalence; D057185:Sedentary Behavior; D057566:Self Report; D013997:Time Factors; D055815:Young Adult
Diabetes; Erectile dysfunction; Physical activity; Sedentary; Sexual function