Intakes of vitamin B6 and dietary fiber and clinical course of systemic lupus erythematosus: A prospective study of Japanese female patients

Yuko Minami, Yasuhiko Hirabayashi, Chisato Nagata, Tomonori Ishii, Hideo Harigae, Takeshi Sasaki

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Background: Intakes of selected vitamins and dietary fiber may influence the clinical course of systemic lupus erythematosus (SLE). Using a cohort study method, we investigated the associations of dietary intake of vitamin B6 and B12, folate, and dietary fiber with the risk of active disease and atherosclerotic vascular events in SLE. Methods: The study included female SLE patients in the Miyagi Lupus Cohort, which was founded in 1995. Dietary nutrients at baseline were estimated by a semiquantitative food frequency questionnaire. The association of each nutrient intake with the risk of active disease was investigated in 216 patients who had inactive disease at baseline. The association with atherosclerotic vascular events was assessed in 196 women who had inactive disease and no history of atherosclerotic diseases at baseline. Results: Forty-three cases of active disease were identified during 9966 person-months of follow-up (1995-1999). During 19 575 person-months of follow-up (1995-2005), 20 atherosclerotic vascular events were documented. The Cox proportional hazards model revealed an inverse association between vitamin B6 intake and the risk of active disease (hazard ratio for the highest as compared with the lowest tertile, 0.41; 95% confidence interval, 0.18-0.97; P for trend = 0.04). An inverse association was also found for dietary fiber intake (P for trend = 0.01). However, no significant association was observed between intakes of these nutrients and the risk of atherosclerotic vascular events. Conclusions: Higher intake of vitamin B6 and dietary fiber may prevent the occurrence of active disease in SLE.

Original languageEnglish
Pages (from-to)246-254
Number of pages9
Journaljournal of epidemiology
Volume21
Issue number4
DOIs
Publication statusPublished - 2011

Keywords

  • Atherosclerosis
  • Dietary fiber
  • Disease activity
  • Systemic lupus erythematosus
  • Vitamin B6

ASJC Scopus subject areas

  • Epidemiology

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