Table 2

Description of cases defined by ‘serology large’ and association with bivariable and multivariable analyses based on Mat-O-Covid index (continuous and categorised)

TotalNo of casesProportion (%)Crude ORs (95% CI)Adjusted ORs*, Mat-O-Covid index continuous (95% CI)Adjusted ORs*, Mat-O-Covid index categorised (95% CI
Sex
 Men67894156.11 1 1 1
 Women77266027.79 1.30 (1.14 to 1.48) 1.21 (1.03 to 1.42) 1.21 (1.03 to 1.42)
Age
 <30 years336144.17 0.47 (0.28 to 0.82) 0.53 (0.29 to 0.99) 0.52 (0.28 to 0.97)
 30–40 years34863389.7 1.17 (1.01 to 1.36) 1.15 (0.97 to 1.38) 1.15 (0.96 to 1.37)
 40–50 years53154468.39 1 1 1
 50–60 years43101774.11 0.47 (0.39 to 0.56) 0.44 (0.36 to 0.55) 0.44 (0.36 to 0.55)
 >=60 years1068423.93 0.45 (0.32 to 0.62) 0.43 (0.28 to 0.64) 0.43 (0.28 to 0.65)
Family meeting
 No497244.830.66 (0.44 to 1.00)0.66 (0.39 to 1.11)0.66 (0.39 to 1.12)
 Yes, one time950656.840.96 (0.74 to 1.25)1.06 (0.77 to 1.46)1.06 (0.77 to 1.47)
 Yes, more than one time13 0239267.11111
Leisure activities
 No33902266.670.93 (0.80 to 1.09)1.02 (0.84 to 1.23)1.02 (0.84 to 1.24)
 Yes, one time836597.060.99 (0.75 to1.30)1.15 (0.83 to 1.60)1.15 (0.83 to 1.60)
 Yes, more than one time10 2407307.13111
Regular shopping
 No284196.690.95 (0.59 to 1.51)0.94 (0.53 to 1.67)0.94 (0.53 to 1.68)
 Yes, one time194115.670.79 (0.43 to 1.46)0.89 (0.45 to 1.78)0.90 (0.45 to 1.79)
 Yes, more than one time13 9849857.04111
Public places visit
 No22541255.55 0.74 (0.61 to 0.90) 0.84 (0.66 to 1.06)0.84 (0.66 to 1.06)
 Yes, one time19471356.93 0.94 (0.78 to 1.14) 0.82 (0.65 to 1.04)0.82 (0.65 to 1.04)
 Yes, more than one time10 2737557.35 1 11
Use of hand sanitiser†
 No278207.19 0.96 (0.61 to 1.53) 0.84 (0.45 to 1.58) 0.84 (0.45 to 1.58)
 Yes, after almost every outing46962876.11 0.81 (0.70 to 0.93) 0.80 (0.67 to 0.95) 0.80 (0.67 to 0.95)
 Yes systematically after each outing (or I never go out)95077087.45 1 1 1
Wearring mask†
 No380225.790.90 (0.58 to 1.42)0.91 (0.53 to 1.57)0.91 (0.53 to 1.57)
 Yes, after almost every outing10 6077717.271.15 (0.99 to 1.35)1.19 (0.98 to 1.44)1.19 (0.99 to 1.45)
 Yes, systematically after each outing (or I never go out)34902226.36111
Difference between questionnaire and serology
 Less than 3 months23442129.04 1 1 1
 3 months or more12 1718056.61 0.71 (0.61 to 0.83) 0.69 (0.57 to 0.84) 0.69 (0.57 to 0.83)
Mat-O-Covid index
 Continuous variable14 51510177.01 1.01 (1.00 to 1.02) 1.01 (1.00 to 1.02)
 <13 per thousand89506186.91 1 1
 ≥13 per thousand12241169.48 1.41 (1.15 to 1.74)

1.33 (1.07 to 1.64)
  • Bold results: overall test, p<0.05.

  • *Adjusted for sex, age, family meeting, leisure activities, regular shopping, public places visit, use of hand sanitiser, wearing mask and time between questionnaires.

  • †Outside of work.