Questionnaire Module Main Survey
twins_w4
Twin module
Questions 4
twins_w4.twinconf
Twins in hh
Type: choice
Source: UKHLS
Text: Can I just confirm, are [CHILD1] and [CHILD2] twins?
| Option | Label |
|---|---|
| 1 | Yes |
| 2 | No |
Universe:
if biological mother of pair of siblings sharing same birthday, or birthdays one day apart, in household (Biological mother of siblings with same birthday (or birthdays one day apart))
twins_w4.twinzyg
Monozygotic twins in hh
Type: choice
Source: UKHLS
Text: Are [CHILD1] and [CHILD2] identical twins?
| Option | Label |
|---|---|
| 1 | Yes |
| 2 | No |
Universe:
if biological mother of pair of siblings sharing same birthday, or birthdays one day apart, in household (Biological mother of siblings with same birthday (or birthdays one day apart))
and if TwinConf = 1 & ((sex of child 1) = (sex of child 2)) (Twins in household and the twins are of the same sex)
- d_twinzyg1 (d_child) multiple birth sibling no. 1: monozygotic twins in hh
twins_w4.zygosity1
PNO of twin 1
Type: number
Source: UKHLS
Universe:
if biological mother of pair of siblings sharing same birthday, or birthdays one day apart, in household (Biological mother of siblings with same birthday (or birthdays one day apart))
and if TwinConf = 1 (Twins in household)
twins_w4.zygosity2
PNO of twin 2
Type: number
Source: UKHLS
Universe:
if biological mother of pair of siblings sharing same birthday, or birthdays one day apart, in household (Biological mother of siblings with same birthday (or birthdays one day apart))
and if TwinConf = 1 (Twins in household)
