Measurement of plasma viscosity in stored frozen samples: A general population study

Mark Woodward, Gordon Lowe, Ann Rumley, Armin Imhof, Wolfgang Koenig

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


To establish whether plasma viscosity could be accurately measured from frozen-stored (instead of fresh) plasma samples in epidemiological studies, we prospectively compared fresh and frozen-stored samples from 1361 men and women aged 25-74 years participating in the Glasgow MONICA survey. Mean plasma viscosity (37°C) was significantly higher (P < 0.0001) in fresh samples (mean = 1.310 mPa/s, standard deviation = 0.079 mPa/s) compared with frozen samples (mean = 1.278 mPa/s, standard deviation = 0.075 mPa/s). However, this difference (mean = 0.030 mPa/s, 95% confidence interval = 0.029-0.031) did not vary significantly with increasing viscosity (kappa statistic for consistency of categorization by thirds = 0.824, standard error = 0.021). We conclude that frozen samples are acceptable for epidemiological studies of plasma viscosity, which should increase their utilization.

Original languageEnglish (US)
Pages (from-to)417-420
Number of pages4
JournalBlood Coagulation and Fibrinolysis
Issue number4
StatePublished - Jun 2003
Externally publishedYes


  • Coronary heart disease
  • Epidemiology
  • Viscosity

ASJC Scopus subject areas

  • Hematology


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