Educational level | Number of correct answers out of 12 questions, median (range)* | Number of correct answers out of six selected questions, median (range)* | Number of correct answers out of three selected questions, median (range)* |
---|---|---|---|
All | 11 (4–12) | 6 (1–6) | 3 (1–3) |
Compulsory school | 9 (4–11) | 5 (1–6) | 2 (1–3) |
Senior high school | 10.5 (6–12) | 6 (3–6) | 3 (1–3) |
College or university | 11 (9–12) | 6 (4–6) | 3 (2–3) |
P value** | 0.001 | 0.004 | 0.012 |