| Time on gluten-free diet | n | % |
| Less than 12 months | 196 | 18.6% |
| 1 year | 132 | 12.5% |
| 2 years | 132 | 12.5% |
| 3 years | 95 | 9.0 % |
| 4 years | 68 | 6.5% |
| 5 years | 87 | 8.3% |
| 6 years | 46 | 4.4% |
| 7 years | 41 | 3.9% |
| 8 years | 44 | 4.2% |
| 9 years | 25 | 2.4% |
| 10 or more years: | 186 | 17.7% |