title: Sleep quality in the survival of elderly taiwanese: roles for dietary diversity and pyridoxine in men and women.
abstract: OBJECTIVE
  The purpose of this study was to investigate dietary contributors to relationships between sleep and all-cause mortality among elderly men and women using a prospective cohort study.
  
  
  METHODS
  The representative Nutrition and Health Survey in Taiwan (NAHSIT) for elders during 1999-2000.
  
  
  METHODS
  One thousand eight hundred sixty-five individuals aged ≥ 65 years from NAHSIT (942 men and 923 women).
  
  
  METHODS
  Dietary diversity scores (DDS) were from 24-hour dietary recalls. Participants were examined and fasting blood was taken. Sleep quality was assessed by questionnaire and classified as poor, fair, or good. Death registry linkage was made until December 31, 2008.
  
  
  RESULTS
  For women, poor sleepers had significantly lower vegetable and vitamin B-6 intakes compared to good sleepers (p < 0.05). For men, good and fair sleepers had a lower risk of death compared to poor sleepers after adjustment with hazards ratios (HRs) and 95% confidence intervals (CIs) of 0.60 (0.42-0.87) and 0.55 (0.36-0.86). The joint HRs for "DDS > 4 and good sleep" were 0.38 (0.22-0.66) for men and 0.52 (0.30-0.88) for women compared to "DDS ≤ 4 and poor sleep." The joint HRs for "plasma pyridoxal phosphate (PLP) adequate and fair sleep" were 0.27 (0.11-0.65) and 0.49 (0.23-1.07) compared to "insufficient and poor sleep" for men and women; for women, PLP adequacy provided significantly reduced HRs for good and poor sleep.
  
  
  CONCLUSIONS
  Sleep quality played a more important role in mortality for men than for women. Sufficient dietary diversity in men could offset the adverse effect on mortality of poor sleep. In women, PLP predicts mortality more than sleep does.
authors.affiliation: a Graduate Institute of Life Sciences , National Defense Medical Center , Taipei.
authors.forename: Yi-Chen
authors.initials: YC
authors.lastname: Huang
authors.forename: Mark L
authors.initials: ML
authors.lastname: Wahlqvist
authors.forename: Meei-Shyuan
authors.initials: MS
authors.lastname: Lee
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D004032:Diet; D005260:Female; D006801:Humans; D008297:Male; D009026:Mortality; D009749:Nutrition Surveys; D009752:Nutritional Status; D011446:Prospective Studies; D011736:Pyridoxine; D012890:Sleep; D013624:Taiwan
chemical_list: D011736:Pyridoxine