Table 5 Associations between supplement use and influence-of-others reasons

Multi-vitamin/Multi-mineral (67 %)

χ ² = 1.074

p = 0.300

V = 0.044

χ ²  = 15.358

p  < 0.001

V = 0.165

Vitamin C (66 %)

χ ² = 0.522

p = 0.470

V = 0.030

χ ² = 1.273

p = 0.259

V = 0.048

B Vitamins (32 %)

χ ² = 2.480

p = 0.115

V = 0.066

χ ² = 1.255

p = 0.263

V = 0.047

Vitamin E (26 %)

χ ² = 1.070

p = 0.301

V = 0.044

χ ² = 2.727

p = 0.099

V = 0.070

Vitamin D (48 %)

χ ² = 0.014

p = 0.904

V = 0.005

χ ² = 9.449

p = 0.002

V = 0.130

Vitamin-enriched Water (65 %)

χ ² = 2.108

p = 0.147

V = 0.061

χ ² = 0.195

p = 0.659

V = 0.019

Iron (27 %)

χ ² = 2.982

p = 0.084

V = 0.073

χ ² = 4.773

p = 0.029

V = 0.092

Calcium (43 %)

χ ² = 6.104

p = 0.013

V = 0.104

χ ² = 7.059

p = 0.008

V = 0.112

Magnesium (17 %)

χ ² = 3.587

p = 0.058

V = 0.080

χ ² = 1.846

p = 0.174

V = 0.057

Protein Powder (51 %)

χ ² = 0.005

p = 0.941

V = 0.003

χ ² = 0.003

p = 0.959

V = 0.002

BCAA (8 %)

χ ² = 0.051

p = 0.821

V = 0.010

χ ² = 0.031

p = 0.859

V = 0.007

Beta-alanine (4 %)

χ ² = 0.003

p = 0.957

V = 0.002

χ ² = 0.012

p = 0.914

V = 0.005

Glutamine (8 %)

χ ² = 1.393

p = 0.238

V = 0.050

χ ² = 0.289

p = 0.591

V = 0.023

Fatty Acids (40 %)

χ ² = 2.852

p = 0.091

V = 0.071

χ ² = 7.947

p = 0.005

V = 0.119

Energy Drinks (27 %)

χ ² = 3.643

p = 0.056

V = 0.080

χ ² = 5.330

P = 0.021

V = 0.097

Sport/Electrolyte Drinks (90 %)

χ ² = 5.129

p = 0.024

V = 0.095

χ ² = 0.165

p = 0.685

V = 0.017

Sport Gels/Gummies (26 %)

χ ² = 6.952

p = 0.008

V = 0.111

χ ² = 0.882

p = 0.348

V = 0.039

Sport/Protein Bar (71 %)

χ ² = 6.420

p = 0.011

V = 0.107

χ ² = 3.154

p = 0.076

V = 0.075

Recovery Drinks (31 %)

χ ² = 0.049

p = 0.826

V = 0.009

χ ² = 0.365

p = 0.546

V = 0.025

Creatine (7 %)

χ ² = 3.489

p = 0.062

V = 0.079

χ ² = 0.012

p = 0.913

V = 0.005

Plant Extracts (47 %)

χ ² = 0.376

p = 0.540

V = 0.026

χ ² = 0.412

p = 0.521

V = 0.027