Table 1 Characteristics of study participants and distribution of completed surveys by country and stringency index of NPIs

Number of participants

30,901

1,041

17,107

12,753

Mean age

33.8

31.2

33.2

34.8

Employment status

 Employed full-time

54.8%

56.1%

47.2%

64.1%

 Employed part-time

12.3%

16.0%

16.3%

6.6%

 Self-employed

5.4%

4.7%

4.6%

6.5%

 Student

12.2%

4.0%

13.7%

10.8%

 Not employed

15.7%

19.1%

18.2%

12.0%

Mean household size

2.9

2.9

2.9

2.8

Household composition

 At least one person aged ≤ 4

16.9%

28.9%

16.9%

15.9%

 At least one person aged 5–11

25.0%

23.7%

24.7%

25.4%

 At least one person aged 12–19

30.8%

17.1%

31.5%

31.0%

 At least one person aged 70 + 

6.5%

3.4%

5.6%

7.9%

Occupation^a

 Health professionals

5.9%

9.9%

6.5%

2.3%

 Teaching professionals

6.1%

9.3%

8.3%

4.1%

Number of completed surveys

119,488

4,129

64,148

51,211

Completed by UK participants

45.5%

54.8%

48.7%

40.9%

Completed surveys by Stringency Index (SI)

  < 50

13.6%

12.2%

12.9%

14.5%

 51–60

12.7%

14.3%

13.4%

11.9%

 61–70

33.9%

34.0%

33.9%

33.8%

 71–80

22.4%

22.0%

22.4%

22.5%

 81 + 

17.4%

17.5%

17.5%

17.3%