Table 1.
Descriptive statistics of the cohort.
| Variable | Total (N = 384,816) |
Not tested (N = 341,388) |
Tested for COVID-19 (N = 43,428) |
COVID-19 test positive (N = 7733) |
Inpatients due to COVID-19 (N = 2494) |
|---|---|---|---|---|---|
| Peak-1 (Mar–Jul 2020) (%) | 23.37 | 52.41 | |||
| Peak-2 (Aug–Dec 2020) (%) | 76.63 | 47.59 | |||
| Early-life experience | |||||
| Maternal smoking around birth (%) | 30.63 | 30.35 | 32.78 | 36.28 | 36.69 |
| Breastfed as a baby (%) | 71.74 | 71.77 | 71.58 | 65.48 | 70.35 |
| Birth month (%) | |||||
| January | 8.40 | 8.42 | 8.25 | 7.86 | 7.30 |
| February | 7.95 | 7.95 | 8.01 | 8.03 | 7.66 |
| March | 9.03 | 9.03 | 8.98 | 9.04 | 9.10 |
| April | 8.61 | 8.61 | 8.63 | 8.60 | 9.06 |
| May | 9.04 | 9.04 | 9.01 | 8.72 | 8.87 |
| June | 8.46 | 8.46 | 8.42 | 8.22 | 8.30 |
| July | 8.51 | 8.52 | 8.49 | 8.35 | 7.82 |
| August | 8.27 | 8.27 | 8.24 | 8.51 | 8.14 |
| September | 8.13 | 8.10 | 8.33 | 8.39 | 8.38 |
| October | 8.00 | 7.99 | 8.11 | 8.42 | 8.78 |
| November | 7.59 | 7.60 | 7.52 | 7.86 | 8.50 |
| December | 8.01 | 8.01 | 8.01 | 7.99 | 8.18 |
| Birthweight (kg) | 3.32 (SD = 0.66) | 3.32 (SD = 0.66) | 3.32 (SD = 0.69) | 3.33 (SD = 0.69) | 3.29 (SD = 0.73) |
| Sociodemographic | |||||
| Age (years) | 68.30 (SD = 8.06) | 68.16 (SD = 8.03) | 69.37 (SD = 8.23) | 66.17 (SD = 8.79) | 70.00 (SD = 8.65) |
| Male (%) | 45.13 | 44.86 | 47.26 | 49.19 | 55.13 |
| College or university degree (%) | 31.31 | 31.83 | 27.26 | 22.63 | 18.55 |
| Average total household income before tax (%) | |||||
| Less than 18,000 | 21.62 | 21.09 | 25.87 | 24.68 | 36.79 |
| 18,000 to 30,999 | 25.50 | 25.49 | 25.57 | 24.26 | 25.23 |
| 31,000 to 51,999 | 26.59 | 26.76 | 25.26 | 27.41 | 22.92 |
| 52,000 to 100,000 | 20.82 | 21.15 | 18.18 | 19.05 | 11.90 |
| Greater than 100,000 | 5.47 | 5.51 | 5.13 | 4.61 | 3.15 |
| Health status and health behaviour | |||||
| Self-reported health status (%) | |||||
| Excellent | 16.54 | 16.95 | 13.33 | 13.30 | 9.36 |
| Good | 59.20 | 59.73 | 55.06 | 55.10 | 49.35 |
| Fair | 20.42 | 19.85 | 24.96 | 25.32 | 30.47 |
| Poor | 3.83 | 3.47 | 6.66 | 6.28 | 10.82 |
| Drinking behaviour (%) | |||||
| Never | 3.27 | 3.23 | 3.58 | 3.06 | 3.95 |
| Drinking in the past | 3.30 | 3.18 | 4.23 | 3.98 | 6.20 |
| Drink currently | 93.43 | 93.59 | 92.18 | 92.96 | 89.85 |
| Smoking behaviour (%) | |||||
| Non-smoker | 55.00 | 55.60 | 50.29 | 50.44 | 42.52 |
| Past smoker | 35.19 | 34.74 | 38.70 | 38.35 | 44.94 |
| Current smoker | 9.81 | 9.66 | 11.02 | 11.21 | 12.54 |
| BMI (kg/m2) | 27.37 (SD = 4.74) | 27.29 (SD = 4.70) | 28.00 (SD = 4.99) | 28.33 (SD = 5.00) | 29.26 (SD = 5.42) |