|
Strength of associations (φ coefficients and corresponding p-values) between reason to use and type of supplements used (all athletes who use supplements n = 520) |
||||
| No time preparing meal |
Avoid sickness |
Over-come injury |
Doctors' advice |
|
|
|
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| Iron |
φ = .059 |
φ = .152 |
φ = .026 |
φ = .259 |
| p = .180 |
p < .001 |
p = .554 |
p < .001 |
|
| Ginseng |
φ = .121 |
φ = .038 |
φ = .079 |
φ = -.088 |
| p = .006 |
p = .394 |
p = .072 |
p = .044 |
|
| Multi Vitamin |
φ = .132 |
φ = .111 |
φ = .043 |
φ = -.006 |
| p = .003 |
p = .011 |
p = .325 |
p = .812 |
|
| Vitamin C |
φ = .014 |
φ = .324 |
φ = -.005 |
φ = .003 |
| p = .747 |
p < .001 |
p = .912 |
p = .944 |
|
| Magnesium |
φ = .044 |
φ = -.016 |
φ = .116 |
φ = .060 |
| p = .260 |
p = .708 |
p = .008 |
p = .170 |
|
| Echinacea |
φ = .048 |
φ = .278 |
φ = .039 |
φ = .002 |
| p = .272 |
p < .001 |
p = .369 |
p = .959 |
|
|
* Statistically significant φ coefficients (at p ≤ .001) are in bold and associations are categorized as strong (φ > .7), intermediate (7 <φ > .3) and weak (φ < .3). | ||||
Petróczi et al. Nutrition Journal 2007 6:34 doi:10.1186/1475-2891-6-34 |
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