title: [Factor analysis of the Japanese version of the Aging Males' Symptoms rating scale].
abstract: We aimed to validate the Japanese version of the Aging Males' Symptoms rating scale (JPN-AMS) by using factor analysis. The study included 155 normal men 40 years old and older, and 116 patients who visited our clinic with complaints of aging males' symptoms. Participants self-administered the JPN-AMS. Factor analysis was done to confirm the internal structure of the questionnaire. We found three items that were not among the factors in the original Aging Males' Symptoms rating scale in normal men and seven items that were not the factors in the original scale in the patients who had a serum free testosterone level below 8.5 pg/ml. In particular, 5 of the 7 somatic items seemed not to be associated with the somatic factor. In conclusion, the factor analysis provided a confirmation of the internal structure of the JPN-AMS. We have to be aware of the different internal structure of the JPN-AMS for the Japanese patients with late-onset hypogonadism. Therefore, we should take care to use the JPN-AMS, as there are cultural differences among countries.
authors.affiliation: Department of Urology, Sapporo Medical University School of Medicine.
authors.forename: Ko
authors.initials: K
authors.lastname: Kobayashi
authors.forename: Ryuichi
authors.initials: R
authors.lastname: Kato
authors.forename: Kohei
authors.initials: K
authors.lastname: Hashimoto
authors.forename: Shin-ichi
authors.initials: S
authors.lastname: Hisasue
authors.forename: Shinichi
authors.initials: S
authors.lastname: Yamashita
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Tanaka
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Maeda
authors.forename: Fumimasa
authors.initials: F
authors.lastname: Fukuta
authors.forename: Naoya
authors.initials: N
authors.lastname: Masumori
authors.forename: Naoki
authors.initials: N
authors.lastname: Itoh
authors.forename: Takaoki
authors.initials: T
authors.lastname: Hirose
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Mori
authors.forename: Taiji
authors.initials: T
authors.lastname: Tsukamoto
mesh_terms: D000375:Aging; D006801:Humans; D007006:Hypogonadism / Q000175:diagnosis; D007564:Japan; D008297:Male; D011795:Surveys and Questionnaires; D013739:Testosterone / Q000097:blood
chemical_list: D013739:Testosterone