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Distribution of smoking-related knowledge scores.
| Scores | Urban | Rural | Overall | χ2 | P-value |
|---|---|---|---|---|---|
| 0–4 | 1,581a (45.1) | 2,256b (65.2) | 3,837 (55.1) | 302.057 | <0.001 |
| 5–7 | 1,025a (29.2) | 732b (21.2) | 1,757 (25.2) | ||
| 8–10 | 901a (25.7) | 471b (13.6) | 1,372 (19.7) |
Denote the statistical outcomes of the Chi-square pairwise comparison; the same characteristic indicates significance at P > 0.05, and a different characteristic indicates significance at P < 0.05.
