title: Rational/antiemotional behaviors in interpersonal relationships and the functional prognosis of patients with rheumatoid arthritis: a Japanese multicenter, longitudinal study.
abstract: BACKGROUND
  The repression of negative emotions is a personality factor that received considerable attention in the 1950-60s as being relevant to the onset and course of rheumatoid arthritis (RA). Despite subsequent, repeated criticisms of the cross-sectional nature of the earlier studies, even to date few prospective studies have been reported on this issue. This multicenter study prospectively examined if "rational and antiemotional" behavior (antiemotionality), characterized by an extreme tendency to suppress emotional behaviors and to rationalize negative experiences in conflicting interpersonal situations, is associated with the functional prognosis of patients with RA.
  
  
  METHODS
  532 patients with RA who regularly visited one of eight hospitals/clinics in Japan in 2000 were recruited for study. All completed a self-administered baseline questionnaire about lifestyle and psychosocial factors including antiemotionality. Two years after, 460 (mean age, 56.1 years; 54 men and 406 women) of 471 patients who continued to visit the clinics agreed to take the follow-up questionnaire. The functional status of the patients was evaluated by rheumatologists based on the ACR classification system.
  
  
  RESULTS
  A multiple logistic regression model that included baseline demographic, disease activity/severity-related, therapeutic, and socioeconomic factors as covariates found a tendency toward higher antiemotionality to be related to poorer functional status at follow-up. This relationship was not explained by lifestyle factors.
  
  
  CONCLUSIONS
  Antiemotionality may be a prognostic factor for the functional status of patients with RA. This finding sheds light on a seemingly forgotten issue in the care of patients with RA.
authors.affiliation: Faculty of Arts and Science, Kyushu University, 6-1 Kasuga Park, Kasuga, Fukuoka 816-8580, Japan. jun@artsci.kyushu-u.ac.jp.
authors.forename: Jun
authors.initials: J
authors.lastname: Nagano
authors.forename: Takako
authors.initials: T
authors.lastname: Morita
authors.forename: Koji
authors.initials: K
authors.lastname: Taneichi
authors.forename: Shohei
authors.initials: S
authors.lastname: Nagaoka
authors.forename: Sadanobu
authors.initials: S
authors.lastname: Katsube
authors.forename: Tomiaki
authors.initials: T
authors.lastname: Asai
authors.forename: Masao
authors.initials: M
authors.lastname: Yukioka
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Takasugi
authors.forename: Masakazu
authors.initials: M
authors.lastname: Kondo
authors.forename: Yasuro
authors.initials: Y
authors.lastname: Nishibayashi