List of themes, and number of times mentioned in the open question request for comments
| Themes | No. of times themes were mentioned |
|---|---|
| Negative journey | 27 |
| Participants own health | 29 |
| (other)Twins health | 27 |
| Family commitments | 12 |
| Time restrictions | 9 |
| Expense of visit | 4 |
| Single twin attendance | 8 |
| Positive comments about study | 16 |
| Negative comments about study | 5 |
| Wants to maintain contact | 21 |
| Suggestions for future | 15 |
| Themes | No. of times themes were mentioned |
|---|---|
| Negative journey | 27 |
| Participants own health | 29 |
| (other)Twins health | 27 |
| Family commitments | 12 |
| Time restrictions | 9 |
| Expense of visit | 4 |
| Single twin attendance | 8 |
| Positive comments about study | 16 |
| Negative comments about study | 5 |
| Wants to maintain contact | 21 |
| Suggestions for future | 15 |