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Correlation between fruits and vegetables consumption and constipation
| Items | Cases | Constipation | Prevalencea | χ2 |
| Vegetables | ||||
| Frequent | 2431 | 218 | 9.0% | 3.546 |
| Rare | 55 | 9 | 16.4% | |
| Fruits | ||||
| Frequent | 1783 | 150 | 8.4% | 3.921 |
| Rare | 703 | 77 | 11.0% | |
| Total | 2486 |
P < 0.05.
