F2F 1: zygosity questionnaire for cohorts 1 & 2 (CAPI)[instrument]

This questionnaire module contains questions on: zygosity.

Questions

Sort Question Name
0 Interviewer: Please record: sex
1 How tall is the older twin [name] currently in cm? zyg0200t
2 How tall is the younger twin [name] currently in cm? zyg0200u
3 Are there differences in the colors of the twins' hair? zyg0300
4 Are there differences in the texture of the twins' hair (e.g., fine or thick, straight or curly)? zyg0301
5 Are there differences in the colors of the twins' eyes? zyg0302
6 Are there differences in the shape of the twins' earlobes? zyg0303
7 Did both twins get their first teeth at the same time? zyg0400
8 Do you know the blood groups (A,B,AB,0) and/or the Rhesus factors (RH+/RH-) of your twins? zyg0500
9 Please tick the respective blood group and the respective Rhesus factor of the twin. zyg0501
10 Please tick the respective blood group and the respective Rhesus factor of the twin. zyg0502
11 Please tick the respective blood group and the respective Rhesus factor of the twin. zyg0503
12 Please tick the respective blood group and the respective Rhesus factor of the twin. zyg0504
13 Are there any differences between the twins caused by problems in childbirth, by an accident or an illness? zyg0600
14 What about the similarities between the twins as they are getting older? As they are getting older, the similarities: zyg0602
15 What do you think: Are your twins monozygotic (identical) or dizygotic (non-identical)? zyg0700
16 Did a medical professional (e.g., family doctor, nurse, physician) ever tell you your twins' zygosity? zyg0702
17 When you look at early photographs of the twins when they were between 2 and 4, can you tell them apart without hints from clothing or other clues? zyg0800
18 Did people confuse the twins when they were very young? zyg0801
19 Did people confuse the twins when they were together? zyg0808
20 Would you say that when the twins were very young, they... zyg0809
21 We are also interested in knowing if there are other twins in your family. Which generation and which side of your family are they on (mother's side/father's side)? Multiple answers are possible. zyg0900
22 For each set of twins in your family, please state whether they are identical/monozygotic or non-identical/dizygotic. zyg0920
Instrument info

Name: wid1_F2F1_module3

Label: F2F 1: zygosity questionnaire for cohorts 1 & 2 (CAPI)


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