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Table 2 Characteristics of the study groups

From: Use of dietary supplements in Olympic athletes is decreasing: a follow-up study between 2002 and 2009

  All athletes   Speed and power events Endurance events Motor skills demanding events Team sport events
  2002 2009 2002 2009 2002 2009 2002 2009 2002 2009
  N = 446 N = 372 N = 113 N = 112 N = 108 N = 80 N = 73 N = 69 N = 152 N = 111
Sex (men/women) 261/185 218/154 82/31 74/38 62/46 45/35 45/28 40/29 72/80 59/52
Mean (SD) age (yr) 23(4.5) 21.2 (4.3) 23.8 (4.1) 21.8 (3.7) 23.6 (4.0) 23.5 (4.1) 23.6 (6.5) 21.4 (4.7) 21.6 (3.6) 18.7 (3.7)
Mean (SD) duration of 11.7 (4.3) 10.2 (4.5) 12.2 (3.7) 10.8 (4.5) 12.4 (4.6) 11.8 (5.0) 11.9 (5.0) 10.2 (4.2) 10.8 (4.1) 8.2 (3.4)
active sport career (yr)           
Mean (SD) training amount (h-wk ˉ¹) 15 (6) 14 (5) 15 (4) 14 (4) 17 (5) 16 (4) 15 (7) 14 (5) 14 (6) 13 (6)
Response rate (%) 90.3 91.9 89.0 86.2 90.8 92.0 82.0 94.5 95.6 96.5