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Table 1 Clinical characteristics of the stored buffy coat samples selected for DNA isolation, N = 120 total samples

From: Buffy coat specimens remain viable as a DNA source for highly multiplexed genome-wide genetic tests after long term storage

Buffy Coat Sample Characteristic N (% or Std Err)
Gender:  
Male 78 (65%)
Female 42 (35%)
Race:  
White 77 (64.2%)
African-American 23 (19.2%)
Hispanic 7 (5.8%)
Asian 5 (4.2%)
Other 8 (6.7%)
Age at Draw:  
Mean years (Std Err) 63.5 (0.66)
Range years 43-80
Year Drawn:  
2001 24 (20%)
2003 24 (20%)
2004 24 (20%)
2005 24 (20%)
2006 11 (9.2%)
2007 10 (8.3%)
2008 3 (2.5%)
Recruiting Clinical Center Network (CCN):  
Total CCNs Sampled 7
Mean Samples per CCN (Range) 17.1 (9-20)
Recruiting Clinic:  
Total Clinics Sampled 74
Mean Samples per Clinic (Range) 1.62 (1-3)
Laboratory Receipt Time:  
Mean hours (Std Err) 29.3 (1.52)
Range hours 12-144
  1. Percentage sums may differ from 100% due to rounding. The Laboratory Receipt Time is the time in hours from blood collection to receipt in the Central Laboratory. The value in the parentheses after the count value in the column labeled N is the percentage or standard error except where noted as a range.