title: Idiopathic sudden hearing loss in patients with type 2 diabetes.
abstract: The aim of the present study was to identify clinical and audiologic characteristics of idiopathic sudden hearing loss (ISHL) in patients with type 2 diabetes. We retrospectively investigated 148 cases of ISHL, whose age was more than 40 years, comparing clinical and audiologic valuables between diabetic and non-diabetic patients. Twenty-four patients (16.2%) had type 2 diabetes (16 male, 8 female). Prevalence of hypertension and hyperlipidemia were significantly greater in diabetic patients. Hearing in the affected ear was more impaired in diabetic than non-diabetic patients, although hearing in the unaffected ear and degree of recovery did not differ significantly. Mean BMI, duration of diabetes, HbA1c values, and ultrasonographically determined carotid intima-media thickness (IMT) and plaque scores in diabetic patients with ISHL were 24.0+/-3.7 kg/m(2), 9.8+/-7.8 years, 7.8+/-1.5%, 0.83+/-0.16 mm, and 3.8+/-2.8, respectively. Of 17 diabetic patients whose ISHL was treated with steroids, 12 required insulin for glycemic control during treatment. Compared with diabetic patients without ISHL, HbA1c value was significantly higher in diabetic patients with ISHL (7.2+/-1.2% versus 7.8+/-1.5%, P=0.0202). In conclusion, nearly 16% of our patients with ISHL had type 2 diabetes, and this subgroup was associated with more severe hearing loss. Further studies are needed to determine which subgroups of diabetic patients are most likely to develop ISHL, which patients are predisposed to more severe hearing loss, and how various factors and treatments influence outcome.
authors.affiliation: The Department of Endocrinology and Hematology, Osaka General Hospital of West Japan Railway Company, 1-2-22 Matsuzaki-cho, Abeno-ku, 545-0053 Osaka, Japan. sayarinapm@hotmail.com
authors.forename: Michiaki
authors.initials: M
authors.lastname: Fukui
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Kitagawa
authors.forename: Naoto
authors.initials: N
authors.lastname: Nakamura
authors.forename: Mayuko
authors.initials: M
authors.lastname: Kadono
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Mogami
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Ohnishi
authors.forename: Chizuko
authors.initials: C
authors.lastname: Hirata
authors.forename: Naoko
authors.initials: N
authors.lastname: Ichio
authors.forename: Katsuya
authors.initials: K
authors.lastname: Wada
authors.forename: Chiyoko
authors.initials: C
authors.lastname: Kishimoto
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Okada
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Miyata
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Yoshikawa
mesh_terms: D000368:Aged; D015992:Body Mass Index; D003924:Diabetes Mellitus, Type 2 / Q000150:complications*; D003925:Diabetic Angiopathies / Q000453:epidemiology; D005260:Female; D006442:Glycated Hemoglobin / Q000032:analysis; D003639:Hearing Loss, Sudden / Q000150:complications / Q000453:epidemiology*; D006801:Humans; D006949:Hyperlipidemias / Q000150:complications / Q000453:epidemiology; D006973:Hypertension / Q000150:complications / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies
chemical_list: D006442:Glycated Hemoglobin