title: Reproducibility of resting blood pressure and heart rate measurements. The HERITAGE Family Study.
abstract: OBJECTIVE
  This study determined the reproducibility of resting systolic and diastolic blood pressure, mean arterial pressure, and heart rate (the average of three measures/day).
  
  
  METHODS
  The data were obtained on two separate days prior to an exercise training intervention in a sample of 822 subjects participating in the HERITAGE Family Study. The same protocol was conducted across three days in an intracenter quality control substudy, which included an additional 60 subjects.
  
  
  RESULTS
  Reproducibility estimates included technical error, coefficient of variation within subjects, and intraclass correlation with results expressed by sex, race, age, cuff size, BMI, and %fat. Since the data were collected across four Clinical Centers, the reproducibility estimates were also computed separately for each Center. The systolic, diastolic, and mean arterial blood pressures were highly reproducible with technical errors less than 5.1 mmHg, coefficients of variation of less than 7. 0% and intraclass correlations > 0.75. The heart rates were slightly less reproducible. These results were fairly consistent across subject populations and across all four Clinical Centers.
  
  
  CONCLUSIONS
  It is concluded that within subject day-to-day variations are small compared to between subject variance for resting systolic, diastolic, and mean arterial blood pressure and heart rate at each of the Clinical Centers for all of the HERITAGE Family Study data. This makes it appropriate to pool the data and analyze it for changes subsequent to endurance exercise training and to determine the possible genetic basis for these changes.
authors.affiliation: Department of Health & Kinesiology, Texas A & M University, College Station, TX 77843-4243, USA.
authors.forename: P R
authors.initials: PR
authors.lastname: Stanforth
authors.forename: J
authors.initials: J
authors.lastname: Gagnon
authors.forename: T
authors.initials: T
authors.lastname: Rice
authors.forename: C
authors.initials: C
authors.lastname: Bouchard
authors.forename: A S
authors.initials: AS
authors.lastname: Leon
authors.forename: D C
authors.initials: DC
authors.lastname: Rao
authors.forename: J S
authors.initials: JS
authors.lastname: Skinner
authors.forename: J H
authors.initials: JH
authors.lastname: Wilmore
mesh_terms: D000293:Adolescent; D000328:Adult; D044383:Black People; D001794:Blood Pressure / Q000502:physiology*; D001795:Blood Pressure Determination / Q000379:methods; D005260:Female; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010807:Physical Endurance; D011786:Quality Control; D015203:Reproducibility of Results; D012146:Rest; D044465:White People