Table 3 Multilevel analyses of the effectiveness of the SmokeFree Sports intervention between baseline (T0) and one year follow-up (T2)

Smoking intentions

 Total non-smoking intentions

I

0.06 ± 0.97

0.08^d (−0.02,0.18)

0.13

0.08^d (−0.02,0.17)

0.14

C

0.06 ± 1.18

Cigarette refusal self-efficacy

 Total refusal self-efficacy

I

0.56 ± 3.23

0.27^d (−0.02,0.56)

0.07

0.23^d (−0.07,0.52)

0.13

C

0.45 ± 3.73

Attitudes towards smoking

 Smoking is bad for health (‘definitely yes’)

I

5.5

0.98^e (0.96,1.01)

0.28

0.99^e (0.97,1.01)

0.42

C

8.3

 Safe to smoke…year or two (‘definitely not’)

I

−0.6

1.05^e (0.95,1.16)

0.42

1.03^e (0.93,1.15)

0.65

C

0.4

 Difficult to quit once started (‘definitely yes’)

I

5.8

1.15^e (1.02,1.29)

0.05

1.15^e (1.02,1.3)

0.06

C

6.6

 Others smoke is harmful to you (‘definitely yes’)

I

0.0

1.14^e (1.08,1.81)

0.03

1.13^e (1.05,1.79)

0.05

C

−2.0

 Affects sports performance (‘definitely yes’)

I

23.2

1.55^e (1.42,1.69)

<0.001*

1.57^e (1.43,1.72)

<0.001*

C

1.3

 Makes you gain or lose weight (‘no difference’)

I

−2.0

1.05^e (0.90,1.22)

0.60

0.98^e (0.83,1.16)

0.84

C

−3.7