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. 2012 Mar 14;104(7):549–555. doi: 10.1093/jnci/djs138

Figure 1.

Figure 1

Established smoking among adolescents and its relationship to early vs late exposure to smoking depicted in movies. Early exposure was assessed at baseline (youths aged 10–14 years), and late exposure was assessed at follow-up (youths aged 17–21 years). For early exposure, the quartile (EQ) breakdowns were 0–525 episodes of exposure in EQ1, 526–955 in EQ2, 956-1664 in EQ3, and 1665–5308 in EQ4. For late exposure, the quartile (LQ) breakdowns were 0–837 episodes in LQ1, 838–1280 in LQ2, 281–1764 in LQ3, and 1765–3495 in LQ4.