Table 4 Adjusted odds ratios and 95 % confidence intervals for combinations of significant interactions from model where response is 4-week validated quit (statistically significant ratios presented in bold)

 Male

1

1

1

1

1

1

1

 Female

1

1.23 (0.78–1.94)

0.82 (0.51–1.29)

2.04 (1.11–3.75)

1.84 (0.96–3.55)

1.02 (0.53–1.96)

5.10 (1.27–20.55)

 12-19

1

1

1

1

1

1

1

 20–29

1

1.24 (0.58–2.64)

78.4 (0.1–71986)

0.1 (0.02–0.38)

0.4 (0.02–8.31)

6.7 (0.64–70.74)

2.1 (0.23–19.23)

 30–49

1

0.77 (0.43–1.39)

109.6 (0.12–98732)

0.11 (0.03–0.44)

0.29 (0.02–4.93)

2.73 (0.28–26.74)

0.55 (0.09–3.17)

 50–69

1

0.90 (0.41–1.97)

76.2 (0.68–68671)

0.1 (0.02–0.30)

0.29 (0.02–5.02)

1.78 (0.18–17.63)

0.14 (0.02–1.33)

 70+

1

48.4 (0.04–54871)

139.1 (0.14–136710)

0.11 (0.02–0.67)

0.34 (0.01–8.35)

0.18 (0.01–3.87)

0.83 (0.03–23.18)