Total | Stress | p for trend | ||||
---|---|---|---|---|---|---|
Low | Medium | High | Very high | |||
Whole sample | ||||||
Number of day cigarette smoked per month, d (95 % CI) | 1.40 (1.22–1.58) | 0.77 (0.44–1.10) | 1.19 (0.97–1.41) | 1.94 (1.49–2.39) | 3.68 (2.22–5.13) | <0.001 |
Number of cigarette smoked per day, cigs (95 % CI) | 0.63 (0.52–0.75) | 0.40 (0.10–0.71) | 0.51 (0.38–0.64) | 0.85 (0.59–1.10) | 2.08 (1.07–3.10) | <0.001 |
Girls | ||||||
Number of day cigarette smoked per month, d (95 % CI) | 0.64 (0.46–0.82) | 0.35 (0.01–0.70) | 0.42 (0.23–0.61) | 0.91 (0.48–1.34) | 2.72 (1.07–4.37) | <0.001 |
Number of cigarette smoked per day, cigs (95 % CI) | 0.27 (0.18–0.36) | 0.09 (0.01–0.18) | 0.15 (0.08–0.21) | 0.36 (0.17–0.55) | 1.69 (0.39–2.98) | <0.001 |
Boys | ||||||
Number of day cigarette smoked per month, d (95 % CI) | 2.08 (1.78–2.38) | 1.07 (0.56–1.58) | 1.85 (1.48–2.22) | 3.08 (2.28–3.88) | 4.91 (2.34–7.49) | <0.001 |
Number of cigarette smoked per day, cigs (95 % CI) | 0.97 (0.77–1.16) | 0.62 (0.11–1.14) | 0.82 (0.59–1.05) | 1.39 (0.90–1.88) | 2.59 (0.95–4.24) | 0.001 |