country |
United Kingdom |
Germany |
number of households surveyed |
∼40 000 |
∼15 000 |
number of participants analysed |
91 267 |
41 275 |
number of adolescent participants analysed (10–24 years) |
27 130 |
9946 |
number of adolescent participants analysed (10–21 years) |
22 531 |
7974 |
number of adolescent participants with one wave of data analysed (10–21 years) |
6720 |
5036 |
number of adolescent participants with two waves of data analysed (10–21 years) |
4210 |
2011 |
number of adolescent participants with three+ waves of data analysed (10–21 years) |
11 601 |
927 |
first year of data analysed |
2009 |
2016 |
number of waves analysed |
9 |
3 |
distance between waves |
annual (but each wave is collected over 2 years) |
annual |
ages available |
10+ years |
12, 14 and 17+ years |
life satisfaction scale |
7-point scale |
10-point scale |