Table 1

COVID-19 positivity rate by testing period, age and sex

ParticipantsSexAge, years
MenWomen<1010–1920–4445–5455–6465+
Samples collected before April 7, 2020 (timely wave 1)COVID-19 positive (n)513139131
COVID-19 negative (n)3954035856336118123107
Positivity (%, 95% CI)1.2 (0.4 to 2.9)3.1 (1.7 to 5.3)1.7 (0.04 to 9.1)5.1 (1.1 to 14.1)2.6 (1.2 to 4.9)0.8 (0.02 to 4.6)2.4 (0.5 to 6.8)0.9 (0.02 to 5)
Samples collected from April 7 to April 28, 2020 (late wave 1)COVID-19-positive (n)02001001
COVID-19-negative (n)1061401216114442535
Positivity (%, 95% CI)1.4 (0.3 to 5.5)0.9 (0.1 to 6)2.8 (0.4 to 18.3)
Collected on April 29 or after (wave 2)COVID-19-positive (n)01001000
COVID-19-negative (n)2142293540165746960
Positivity (%, 95% CI)0.4 (0.06 to 3.1)0.6 (0.08 to 4.2)