Table 4 Additive interaction analyses for women and men

Good family-no daily peer

1

1

1

1

1

1

Good family- daily peer

0.82 (0.50–1.34)

1.36 (0.90–2.07)

1.97 (1.24–3.11)

1.99 (1.48–2.66)

1.26 (0.94–1.68)

1.15 (0.84–1.58)

Poor family-no daily peer

1.72 (1.09–2.70)

1.57 (1.00–2.45)

1.91 (1.15–3.17)

2.19 (1.42–3.35)

1.97 (1.29–3.01)

0.83 (0.49–1.39)

Poor family- daily peer

1.87 (1.16–3.00)

2.11 (1.34–3.33)

2.81 (1.71–4.63)

3.34 (2.21–5.04)

2.36 (1.57–3.57)

1.59 (1.02–2.48)

RERI (95% CI)

0.34 (− 0.66–1.33)

0.18 (− 0.89–1.25)

− 0.06 (− 1.57–1.45)

0.17 (− 1.32–1.65)

0.14 (− 1,01–1.30)

0.61 (− 0.11–1.33)

Good family-good school

1

1

1

1

1

1

Good family-poor school

1.36 (0.64–2.88)

0.40 (0.14–1.14)

0.28 (0.07–1.16)

1.02 (0.59–1.77)

1.35 (0.79–2.30)

1.12 (0.60–2.08)

Poor family-good school

1.85 (1.27–2.70)

1.50 (1.05–2.14)

1.56 (1.06–2.29)

1.88 (1.36–2.58)

2.03 (1.47–2.81)

1.09 (0.76–1.57)

Poor family-poor school

2.70 (1.40–5.22)

1.66 (0.84–3.28)

2.29 (1.10–4.77)

2.61 (1.35–5.04)

1.82 (0.97–3.39)

1.42 (0.71–2.85)

RERI (95% CI)

0.50 (− 1.48–2.47)

0.75 (− 0.47–1.98)

1.45 (− 0.26–3.16)

0.71 (− 1.12–2.54)

− 0.56 (− 1.98–0.86)

0.21 (− 1.01–1.42)

Good family- Sweden

1

1

1

1

1

1

Good family-Finland

1.08 (0.67–1.72)

1.77 (1.14–2.73)

3.10 (1.82–5.27)

0.49 (0.37–0.65)

2.57 (1.93–3.41)

3.63 (2.64–5.00)

Poor family-Sweden

1.73 (0.94–3.20)

1.69 (0.93–3.08)

2.10 (1.03–4.28)

2.27 (1.41–3.65)

2.12 (1.34–3.34)

1.26 (0.74–2.14)

Poor family-Finland

2.16 (1.32–3.55)

2.77 (1.71–4.50)

5.12 (2.90–9.06)

0.90 (0.61–1.33)

4.76 (3.16–7.17)

3.92 (2.49–6.18)

RERI (95% CI)

0.35 (− 0.77–1.48)

0.32 (− 0.95–1.58)

0.93 (− 1.22–3.08)

− 0.86 (− 1.94–0.22)

1.08 (− 0.78–2.93)

0.03 (− 1.70–1.75)

No daily peer-good school

1

1

1

1

1

1

No daily peer-poor school

1.49 (0.80–2.75)

0.80 (0.40–1.61)

1.37 (0.66–2.84)

1.63 (0.97–2.75)

1.38 (0.83–2.31)

1.32 (0.73–2.38)

Daily peer-good school

0.97 (0.67–1.42)

1.39 (0.99–1.95)

1.99 (1.38–2.88)

2.05 (1.57–2.68)

1.34 (1.03–1.74)

1.35 (1.01–1.81)

Daily peer-poor school

1.73 (0.75–3.98)

1.23 (0.49–3.08)

0.88 (0.25–3.06)

2.21 (1.09–4.46)

1.56 (0.78–3.12)

1.53 (0.71–3.30)

RERI (95%CI)

0.27 (− 1.38–1.91)

0.04 (− 1.24–1.32)

− 1.48 (− 3.12–0.15)

− 0.47 (− 2.22–1.28)

− 0.17 (− 1.44–1.11)

− 0.14 (− 1.52–1.25)

No daily peer- Sweden

1

1

1

1

1

1

No daily peer- Finland

0.96 (0.63–1.48)

1.42 (0.93–2.16)

2.02 (1.22–3.33)

0.36 (0.25–0.51)

2.18 (1.58–3.02)

3.19 (2.20–4.61)

Daily peer-Sweden

0.60 (0.29–1.27)

1.01 (0.52–1.94)

1.06 (0.48–2.30)

1.61 (1.10–2.37)

1.12 (0.75–1.68)

1.20 (0.76–1.91)

Daily peer-Finland

1.12 (0.71–1.76)

2.24 (1.45–3.45)

4.32 (2.62–7.12)

0.81 (0.60–1.11)

3.12 (2.26–4.32)

4.42 (3.07–6.36)

RERI (95% CI)

0.56 (−0.05–1.16)

0.81 (− 0.10–1.72)

2.25 (0.65–3.85)

−0.16 (− 0.76–0.44)

0.81 (− 0.20–1.84)

1.03 (− 0.37–2.43)

Good school-Sweden

1

1

1

1

1

1

Good school-Finland

1.22 (0.82–1.83)

1.77 (1.22–2.56)

3.18 (2.03–5.00)

0.50 (0.38–0.64)

2.56 (1.97–3.32)

3.80 (2.82–5.13)

Poor school-Sweden

1.50 (0.75–3.02)

0.99 (0.47–2.07)

1.47 (0.65–3.33)

1.30 (0.78–2.18)

1.33 (0.79–2.23)

1.50 (0.84–2.69)

Poor school-Finland

2.04 (0.94–4.44)

1.14 (0.45–2.85)

1.65 (0.54–5.07)

0.66 (0.32–1.36)

3.29 (1.65–6.55)

3.17 (1.42–7.04)

RERI (95% CI)

0.32 (− 1.42–2.05)

−0.61 (− 1.95–0.72)

− 2.00 (− 4.45–0.45)

−0.13 (− 0.94–0.67)

0.41 (− 1.89–2.70)

−1.14 (− 3.81–1.53)