|
Pairwise association (chi-square test statistics and corresponding p-values) between reason to use and type of supplements used (all athletes who use supplements n = 520), testing H0: independence |
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| No time preparing meal |
Avoid sickness |
Over-come injury |
Doctors' advice |
|
|
|
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| Iron |
χ2 = 1.798 |
χ2 = 11.940 |
χ2 = 0.350 |
χ2 = 35.004 |
| p = .180 |
p = .001 |
p = .554 |
p <.001 |
|
| Ginseng |
χ2 = 7.636 |
χ2 = 0.757 |
χ2 = 3.238 |
χ2 = 4.055 |
| p = .006 |
p = .384 |
p = .072 |
p = .044 |
|
| Multi Vitamin |
χ2 = 9.103 |
χ2 = 6.427 |
χ2 = 0.970 |
χ2 = 0.190 |
| p = .003 |
p = .011 |
p = .325 |
p = .892 |
|
| Vitamin C |
χ2 = 0.104 |
χ2 = 54.671 |
χ2 = 0.012 |
χ2 = 0.005 |
| p = .747 |
p <.001 |
p = .912 |
p = .944 |
|
| Magnesium |
χ2 = 1.267 |
χ2 = 0.140 |
χ2 = 6.997 |
χ2 = 1.883 |
| p = .260 |
p = .708 |
p = .008 |
p = .170 |
|
| Echinacea |
χ2 = 1.206 |
χ2 = 40.343 |
χ2 = 0.806 |
χ2 = 0.003 |
| p = .272 |
p <.001 |
p = .369 |
p = .959 |
|
|
*Statistically significant associations (at p ≤ .001) are in bold. | ||||
Petróczi et al. Nutrition Journal 2007 6:34 doi:10.1186/1475-2891-6-34 |
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