Table 1 Descriptive statistics

Burden: social isolation/loneliness

3.995

2.695

4.583

2.503

Burden: being separated from important people

4.737

2.783

5.307

2.545

Burden: lack of leisure activities

5.020

2.861

6.146

2.732

Burden of social isolation (3-item-score)

4.584

2.150

5.345

2.039

Loneliness (mean of up to 3 measurements before first lockdown)

1.715

0.635

1.738

0.659

Observations

798

2520

N twin pairs

399

1260