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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).