Table 2 Odds ratio statistics for RU player status of COL5A1 gene variants (rs12722 and rs3196378)

 All athletes v Controls

CC/TT

CC/T_carriers

C_allele/T_allele

1.70

1.45

1.28

1.19–2.42

1.07–1.97

1.08–1.52

 RU athletes v Controls

CC/TT

CC/T_carriers

C_allele/T_allele

1.76

1.53

1.30

1.22–2.54

1.11–2.09

1.09–1.55

 Forwards v Controls

CC/TT

CC/T_carriers

C_allele/T_allele

1.66

1.53

1.26

1.08–2.54

1.06–2.22

1.02–1.55

 Backs v Controls

CC/TT

CC/T_carriers

C_allele/T_allele

1.92

1.51

1.36

1.19–3.12

1.01–2.27

1.08–1.72

 Back 3 and centres v Controls

CC/TT

CC/T_carriers

C_allele/T_allele

2.30

1.76

1.48

1.29–4.08

1.09–2.78

1.12–1.96

 All athletes v Controls

CC/AA

CC/A_carriers

C_allele/A_allele

1.83

1.66

1.32

1.29–2.59

1.22–2.25

1.12–1.56

 RU athletes v Controls

CC/AA

CC/A_carriers

C_allele/A_allele

1.88

1.73

1.34

1.31–2.70

1.27–2.37

1.12–1.59

 Forwards v Controls

CC/AA

CC/A_carriers

C_allele/A_allele

1.90

1.88

1.34

1.25–2.89

1.31–2.69

1.09–1.66

 Backs v Controls

CC/AA

CC/A_carriers

C_allele/A_allele

1.85

1.54

1.33

1.14–2.99

1.02–2.31

1.06–1.68

 Back 3 and centres v Controls

CC/AA

CC/A_carriers

C_allele/A_allele

2.25

1.78

1.46

1.27–4.00

1.11–2.84

1.11–1.93

 All athletes v Controls

C–C/T–A

^aCC–CC

1.31

1.97

1.10–1.56

1.44–2.69

 RU athletes v Controls

C–C/T–A

^aCC–CC

1.32

2.11

1.11–1.59

1.53–2.91

 Forwards v Controls

C–C/T–A

^aCC–CC

1.31

2.19

1.05–1.62

1.51–3.16

 Backs v Controls

C–C/T–A

^aCC–CC

1.36

1.86

1.07–1.72

1.29–2.67

 Back 3 and centres v Controls

C–C/T–A

^aCC–CC

1.49

2.35

1.12–1.99

1.47–3.77