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Table 1 Descriptive data of control samples and doping offences in the professional tennis circuit in the 2003-2009 period.

From: Epidemiological analysis of doping offences in the professional tennis circuit

Year N° offences* Samples* (total) Urine Blood In-Comp Out-Comp
2009 7 2126 1991 135 1972 154
2008 10 2018 1861 157 1927 91
2007 3 2028 1833 195 1871 157
2006 9 1733 1538 195 1583 150
2005 14 1744 1589 155 1654 90
2004 7 1698 1509 189 1620 78
2003 2 1993 1755 238 1912 81
Total 52 13340 12076 1264 12539 801
Average/year 7.4 ± 4.1 1905.7 ± 174.5 1725.1 ± 183.4 180.5 ± 34.3 1791.2 ± 165.1 114.4 ± 37.0
  1. 'In-Comp': in competition testing; 'Out-Comp': out of competition testing.
  2. * Correlation analysis of doping offences and number of samples obtained per calendar year failed to show statistical significance (p = 0.58, Spearman R: -0.2522).