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Table 3 Results of multinomial regression calculations for dietary supplement use (DSU) as criterion variable, with non-usage of the dietary supplements as reference value

From: What drives athletes toward dietary supplement use: objective knowledge or self-perceived competence? Cross-sectional analysis of professional team-sport players from Southeastern Europe during the competitive season

  Regular-DSU Irregular-DSU
OR (95%CI) OR (95%CI)
TOTAL SAMPLE (N = 914)
 Age 0.91 (0.85–0.98) 0.97 (0.93–1.02)
 Competitive result 1.00 (0.99–1.00) 1.00 (1.00–1.00)
 S/KN&DS 1.67 (1.44–1.92) 1.11 (1.01–1.22)
 O/KN&DS 1.15 (1.04–1.26) 1.08 (1.01–1.16)
Gender
 Male 0.94 (0.61–1.45) 1.15 (0.85–1.54)
 Female REF REF
BASKETBALL (N = 228)
 Age 0.96 (0.85–1.1) 1.01 (0.93–1.1)
 Competitive result 1.18 (0.54–2.60) 1.29 (0.73–2.28)
 S/KN&DS 2.51 (1.85–3.42) 1.48 (1.20–1.83)
 O/KN&DS 1.25 (1.04–1.51) 1.12 (0.97–1.29)
Gender
 Male 1.49 (0.65–3.41) 0.92 (0.48–1.74)
 Female REF REF
SOCCER (N = 324)
 Age 1.22 (0.89–1.69) 0.86 (0.75–0.98)
 Competitive result 1.67 (0.19–14.70) 0.13 (0.05–0.38)
 S/KN&DS 1.73 (0.76–3.96) 0.85 (0.67–1.06)
 O/KN&DS 0.83 (0.53–1.30) 1.11 (0.93–1.32)
 Gender   
 Male 0.76 (0.11–5.15) 1.15 (0.56–2.37)
 Female REF REF
VOLLEYBALL (N = 154)
 Age 1.06 (0.91–1.22) 1.03 (0.94–1.13)
 Competitive result 0.33 (0.13–0.84) 0.73 (0.47–1.13)
 S/KN&DS 1.12 (0.85–1.47) 1.13 (0.95–1.34)
 O/KN&DS 1.06 (0.88–1.28) 1.06 (0.95–1.19)
Gender
 Male 0.73 (0.32–1.65) 0.82 (0.50–1.34)
 Female REF REF
HANDBALL (N = 206)
 Age 0.83 (0.72–0.95) 0.95 (0.87–1.03)
 Competitive result 1.08 (0.64–1.82) 1.08 (0.64–1.82)
 S/KN&DS 2.12 (1.55–2.90) 0.97 (0.77–1.22)
 O/KN&DS 1.09 (0.91–1.30) 1.11 (0.97–1.26)
Gender
 Male 0.62 (0.25–1.56) 2.21 (1.08–4.52)
 Female REF REF
  1. LEGEND: Age – age of the players, Competitive result – the highest competitive result the athlete achieved in sport, S/KN&DS – self-perceived competence on nutrition and dietary supplementation, O/KN&DS – evaluation of knowledge on nutrition and dietary supplementation, REF – reference value in regression calculation