Table 4 |
|||||||||
|
Relative percentage of congruent answers by 'ability to train longer' and 'doctors' advice' as rationale for supplement use and supplement used by all athletes who reported the use of nutritional supplements (n = 520) |
|||||||||
| Able to train longer |
Doctors' advice |
||||||||
|
|
|||||||||
| Yes |
No |
Yes |
No |
||||||
|
|
|||||||||
| Creatine |
Yes |
51 |
73.9% |
137 |
30.4% |
||||
| No |
18 |
26.1% |
314 |
69.6% |
|||||
| 69 |
100.0% |
451 |
100.0% |
||||||
| Iron |
Yes |
64 |
50.8% |
91 |
23.1% |
||||
| No |
62 |
49.2% |
303 |
76.9% |
|||||
| 126 |
100.0% |
394 |
100.0% |
||||||
| Ginseng |
Yes |
10 |
14.5% |
33 |
7.3% |
||||
| No |
59 |
85.5% |
418 |
92.7% |
|||||
| 69a |
100.0% |
451a |
100.0% |
||||||
| Whey protein |
Yes |
41 |
59.4% |
118 |
26.2% |
||||
| No |
28 |
40.6% |
333 |
73.8% |
|||||
| 69 |
100.0% |
451 |
100.0% |
||||||
| Caffeine |
Yes |
33 |
47.8% |
91 |
20.2% |
||||
| No |
36 |
52.2% |
360 |
79.8% |
|||||
| 69 |
100.0% |
451 |
100.0% |
||||||
| Vitamin C |
Yes |
53 |
76.8% |
313 |
69.4% |
89 |
70.6% |
277 |
70.3% |
| No |
16 |
23.2% |
138 |
30.6% |
37 |
29.4% |
117 |
29.7% |
|
| 69 |
100.0% |
451 |
100.0% |
126 |
100.0% |
394 |
100.0% |
||
|
|
|||||||||
|
a expected association from anecdotal effect. |
|||||||||
|
Petróczi et al. Journal of the International Society of Sports Nutrition 2007 4:19 doi:10.1186/1550-2783-4-19 |
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