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Table 1 Characteristics of the study population stratified by binary SenASTrIS antibody test result

From: Is living in a household with children associated with SARS-CoV-2 seropositivity in adults? Results from the Swiss national seroprevalence study Corona Immunitas

Variable

Negative a (n = 1980)

Positive a) (n = 413)

SARS-CoV-2 symptoms and tests

 Prior PCR-confirmed SARS-CoV-2 infection

15 (0.8)

128 (31.2)

 Symptoms b

  None

816 (42.2)

93 (22.8)

  < 3

323 (16.7)

51 (12.5)

  ≥ 3

795 (41.1)

264 (64.7)

Primary exposure

 Number of children in household c

0.59 (±0.92)

0.70 (±1.01)

 Children in household

  None

1296 (66.0)

252 (61.3)

  Any child 0–5 years

276 (14.1)

64 (15.6)

  Any child 6–11 years

279 (14.2)

71 (17.3)

  Any child 12–17 years

296 (15.1)

72 (17.5)

 Child with PCR-confirmed infection

17 (0.9)

13 (3.2)

Sociodemographic characteristics

 Age c)

45·04 (±12.3)

43·97 (±11.9)

 Male gender

917 (46.4)

202 (49.0)

 Household monthly income (CHF) d

  < 6000

521 (28.0)

113 (29.4)

  6000–<12,000

908 (48.8)

176 (45.8)

  12,000–<18,000

314 (16.9)

65 (16.9)

  ≥ 18,000

116 (6.2)

30 (7.8)

 Swiss nationality

1681 (85.4)

346 (84.2)

 Highest education

 Primary

83 (4.2)

17 (4.1)

 Secondary

878 (44.7)

162 (39.5)

 Tertiary

1002 (51.0)

231 (56.3)

Other household characteristics

 Number of other people in the household c

1.86 (±1.29)

1.99 (±1.34)

 ≥ 1 other adult in household

1678 (85.4)

356 (86.6)

 Number of other adults in the household c

1.25 (±0.91)

1.23 (±0.92)

Employment status and other exposure

 Being unemployed or working full-time from home

879 (47.1)

141 (36.2)

 ≥ 1 contact outside the household during the previous 7 days

1608 (83.2)

335 (83.8)

 Number of contacts outside the household during previous 7 days c

8·58 (±27.2)

9·80 (±21.8)

 Notification by SwissCOVID App about contact tested positive

51 (5.4)

18 (10.4)

 Health-related history

  Any chronic conditions e

338 (17.2)

74 (18.0)

  Cancer

16 (0.8)

2 (0.5)

  Diabetes

30 (1.5)

11 (2.7)

  Immunocompromised

51 (2.6)

10 (2.4)

  Hypertension

184 (9.4)

32 (7.8)

  Cardiovascular disease

35 (1.8)

11 (2.7)

  Chronic respiratory disease

106 (5.4)

26 (6.3)

  Smoking tobacco products

481 (24.4)

98 (23.8)

  1. If not indicated otherwise, data are presented as count (%)
  2. aIndeterminate results (n = 44) were all confirmed “indeterminate” and thus considered negative
  3. bAny of the following: fever (subjective), fever (higher 38°C), cough, rhinorrhoea, sneezing, sore throat, shortness of breath, trouble breathing, headache, myalgia, chest pain, fatigue, loss of appetite, nausea, diarrhoea, upset stomach, and anosmia for at least 3 days
  4. cPresented as mean with (± standard deviation)
  5. dIn 2020 on average 1 CHF was equal to 0.93 €, and
  6. eAny of the following: cancer, diabetes, immunocompromised, hypertension, cardiovascular disease, and chronic respiratory disease
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BMC Medicine

ISSN: 1741-7015

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