Table 3 Trends in early attempts at cigarette smoking among adolescents
Mean age at first cigarette smoked/years | Age window at first cigarette smoked (10th–90th percentile; years) | |||
|---|---|---|---|---|
Boysa | Girlsa | Boys | Girls | |
Total | 12.0 (11.9–12.2) | 11.9 (11.6–12.1) | 10.5–12.5 | 10.5–12.5 |
WHO region | ||||
African region | 11.7 (11.4–12.1) | 11.1 (10.5–11.6) | 10.5–12.5 | 8.5–12.5 |
Region of the Americas | 12.1 (11.8–12.4) | 12.2 (11.8–12.6) | 10.5–12.5 | 10.5–12.5 |
Southeast Asia region | 11.9 (11.2–12.6) | 10.9 (9.8–12.0) | 10.5–12.5 | 8.5–12.5 |
European region | 11.8 (11.5–12.2) | 12.4 (12.0–12.8) | 10.5–12.5 | 10.5–13.7 |
Eastern Mediterranean region | 12.2 (11.9–12.5) | 11.6 (10.8–12.4) | 10.5–12.5 | 8.7–12.5 |
Western Pacific region | 12.5 (12.0–13.0) | 12.7 (12.2–13.2) | 10.5–14.5 | 10.7–14.5 |
Country income | ||||
Low income | 11.8 (11.4–12.2) | 10.7 (10.0–11.4) | 10.5–12.5 | 8.5–12.5 |
Lower-middle income | 12.0 (11.6–12.3) | 11.7 (11.2–12.2) | 10.5–12.5 | 10.5–12.5 |
Upper-middle income | 12.2 (12.0–12.5) | 12.3 (12.0–12.6) | 10.5–12.5 | 10.5–12.5 |
High income | 12.0 (11.9–12.2) | 12.4 (12.2–12.7) | 10.5–12.5 | 11.3–12.5 |
PPP/capita, $ | ||||
Q1 600–3299 | 11.8 (11.4–12.2) | 10.8 (10.2–11.4) | 10.5–12.5 | 8.5–12.5 |
Q2 3300–7999 | 12.2 (11.9–12.6) | 11.8 (11.1–12.5) | 10.5–12.5 | 10.5–14.5 |
Q3 8000–13,699 | 11.9 (11.4–12.3) | 12.1 (11.7–12.5) | 10.5–12.5 | 10.5–12.5 |
Q4 13,700–23,999 | 12.1 (11.8–12.4) | 12.1 (11.7–12.5) | 10.5–12.5 | 10.5–12.5 |
Q5 ≥24,000 | 12.1 (11.8–12.4) | 12.5 (12.2–12.8) | 10.5–12.5 | 12.5–12.5 |
β (95% CI) | 0.05 (−0.06, 0.16) | 0.36 (0.21, 0.52) | - | - |
P | 0.334 | <0.001 | - | - |
FCTC ratification status | ||||
Not ratified | 12.3 (11.8–12.8) | 11.7 (10.3–13.1) | 10.7–12.5 | 8.5–14.3 |
Ratified | 12.0 (11.8–12.2) | 11.9 (11.6–12.1) | 10.5–12.5 | 10.5–12.5 |