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Table 2 Weighted censored negative binomial regression model: mean and relative number of contacts.

From: Estimating the impact of school closure on social mixing behaviour and the transmission of close contact infections in eight European countries

Category

Covariate

Number of Participants

Mean

(Std Dev)

Relative no. of Reported Contacts (95% CI)

Age

< 5

660

10.21 (7.65)

1.00

 

5-9

661

14.81 (10.09)

1.42 (1.27, 1.56)

 

10-14

713

18.69 (13.40)

1.76 (1.58, 1.94)

 

15-19

685

19.93 (21.14)

1.79 (1.61, 1.97)

 

20-29

879

17.18 (25.72)

1.66 (1.51, 1.81)

 

30-39

815

17.83 (21.68)

1.63 (1.49, 1.78)

 

40-49

908

17.51 (23.29)

1.57 (1.43, 1.70)

 

50-59

906

15.96 (20.84)

1.48 (1.35, 1.62)

 

60-69

728

10.51 (14.47)

1.10 (1.00, 1.21)

 

70 +

270

7.71 (10.97)

0.81 (0.73, 0.89)

 

Missing*

65

10.40 (12.78)

0.94 (0.65, 1.23)

Gender

Female

3808

16.13 (21.93)

1.00

 

Male

3429

15.14 (15.57)

0.97 (0.94, 1.01)

 

Missing**

53

10.92 (8.60)

1.60 (1.06, 2.14)

House hold size

1

749

11.23 (18.26)

1.00

 

2

1645

13.32 (17.89)

1.20 (1.13, 1.27)

 

3

1683

14.67 (16.44)

1.23 (1.15, 1.31)

 

4

2041

17.71 (17.67)

1.38 (1.29, 1.47)

 

5

814

19.49 (29.12)

1.44 (1.34, 1.55)

 

6+

358

19.30 (13.14)

1.63 (1.48, 1.79)

Day of the week

Sunday

862

11.98 (14.54)

1.00

 

Monday

1032

16.36 (27.65)

1.35 (1.26, 1.45)

 

Tuesday

1116

16.69 (20.16)

1.40 (1.31, 1.50)

 

Wednesday

1017

16.93 (18.39)

1.40 (1.31, 1.50)

 

Thursday

1069

16.86 (16.31)

1.41 (1.31, 1.51)

 

Friday

1122

17.00 (18.25)

1.42 (1.33, 1.52)

 

Saturday

936

12.85 (14.52)

1.19 (1.11, 1.28)

 

Missing***

136

12.85 (12.26)

1.44 (1.20, 1.68)

Country

BE

750

19.30 (24.31)

1.00

 

DE

1341

7.95 (6.26)

0.49 (0.46, 0.53)

 

FI

1006

18.46 (32.15)

0.86 (0.80, 0.93)

 

GB

1012

11.74 (7.67)

0.72 (0.67, 0.77)

 

IT

849

19.77 (12.27)

1.18 (1.08, 1.27)

 

LU

1051

17.46 (12.81)

1.02 (0.94, 1.09)

 

NL

269

24.92 (42.70)

1.41 (1.25, 1.56)

 

PL

1012

16.31 (11.45)

0.97 (0.89, 1.04)

Period

Regular

6106

16.15 (19.64)

1.00

 

Holiday

1048

12.93 (16.46)

0.91 (0.86, 0.96)

 

Missing***

136

12.85 (12.26)

1.09 (1.01, 1.16)

Overdispersion

alpha

  

0.41 (0.40, 0.43)

  1. * Missing age was equally distributed over the other variables
  2. ** Missing gender was associated with weekday, regular period and household size 1-4.
  3. ** Missing day of the week/period was associated with DE, GB, LU and household size 2-4
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