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Table 5 Analysis of doping infractions in wheel-chair and non-handicapped tennis players during the 2003-2009 period.

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

  Non-handicapped players Wheel Chair Players Total
Total Samples 13064 276 13340
Sample Average/year 1866.2 39.4 1905.7 ± 174.5
Total Doping Offences 47 5 52
Doping Offences/year 6.7 0.7 7.4 ± 4.1
Incidence Offences/sample (%) 0.35a 1.81a 0.38
  1. a p = 0.0001