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Number of respondents according to time when they undergo orthodontic treatment
| Country/Answer | A. Less than 3 years ago | B. Between 3 to 5 years ago | C. Between 5 to 10 years ago | D. More than 10 years ago | E. I have not received orthodontic treatment |
|---|---|---|---|---|---|
| Chile | 94 (14,1%) | 148 (22,1%) | 147 (21,9%) | 137 (20,4%) | 144 (21,5%) |
| Poland | 39 (9,2%) | 88 (20,9%) | 59 (14,0%) | 59 (14,0%) | 177 (41,9%) |
| Sum | 133 (12,2%) | 236 (21,6%) | 206 (18,9%) | 196 (17,9%) | 321 (29,4%) |
| Difference CL/PL | 0.024 | 0.683 | 0.001 | 0.009 | < 0.001 |
