Table 2.
Agreement between serological assays. Comparison of the number of positive samples by two techniques (A), the overall percent agreement (B) and the calculation of Kappa index (C).
| A | |||||
|---|---|---|---|---|---|
| ALL | |||||
| n = 168 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | 98 | ||||
| BIORAD | 93 | 96 | |||
| EUROIMMUN | 83 | 80 | 88 | ||
| ABBOTT | 83 | 84 | 75 | 84 | |
| LIAISON | 73 | 83 | 70 | 70 | 73 |
| Inpatients with SARS-CoV-2 positive PCR | |||||
|---|---|---|---|---|---|
| n = 20 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | 20 | ||||
| BIORAD | 20 | 20 | |||
| EUROIMMUN | 20 | 20 | 20 | ||
| ABBOTT | 20 | 20 | 20 | 20 | |
| LIAISON | 20 | 20 | 20 | 20 | 20 |
| Outpatients with SARS-CoV-2 positive PCR | |||||
|---|---|---|---|---|---|
| n = 58 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | 53 | ||||
| BIORAD | 50 | 52 | |||
| EUROIMMUN | 43 | 41 | 44 | ||
| ABBOTT | 45 | 46 | 39 | 46 | |
| LIAISON | 40 | 50 | 38 | 37 | 40 |
| Outpatients with no history of SARS-CoV-2 infection | |||||
|---|---|---|---|---|---|
| n = 62 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | 25 | ||||
| BIORAD | 23 | 24 | |||
| EUROIMMUN | 20 | 19 | 23 | ||
| ABBOTT | 18 | 18 | 16 | 18 | |
| LIAISON | 13 | 13 | 12 | 13 | 13 |
| Patients with positive PCR for other human coronaviruses in 2019 | |||||
|---|---|---|---|---|---|
| n = 28 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | 0 | ||||
| BIORAD | 0 | 0 | |||
| EUROIMMUN | 0 | 0 | 1 | ||
| ABBOTT | 0 | 0 | 0 | 0 | |
| LIAISON | 0 | 0 | 0 | 0 | 0 |
| B | |||||
|---|---|---|---|---|---|
| ALL | |||||
| n = 168 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | |||||
| BIORAD | 943 | ||||
| EUROIMMUN | 864 | 836 | |||
| ABBOTT | 886 | 914 | 85 | ||
| LIAISON | 821 | 807 | 857 | 879 | |
| Inpatients with SARS-CoV-2 positive PCR | |||||
|---|---|---|---|---|---|
| n = 20 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | |||||
| BIORAD | 100 | ||||
| EUROIMMUN | 100 | 100 | |||
| ABBOTT | 100 | 100 | 100 | ||
| LIAISON | 100 | 100 | 100 | 100 | |
| Outpatients with SARS-CoV-2 positive PCR | |||||
|---|---|---|---|---|---|
| n = 58 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | |||||
| BIORAD | 914 | ||||
| EUROIMMUN | 81 | 759 | |||
| ABBOTT | 845 | 897 | 793 | ||
| LIAISON | 776 | 724 | 862 | 793 | |
| Outpatients with no history of SARS-CoV-2 infection | |||||
|---|---|---|---|---|---|
| n = 62 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | |||||
| BIORAD | 952 | ||||
| EUROIMMUN | 871 | 855 | |||
| ABBOTT | 887 | 903 | 855 | ||
| LIAISON | 806 | 823 | 806 | 919 | |
| Patients with positive PCR for other human coronaviruses in 2019 | |||||
|---|---|---|---|---|---|
| n = 28 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | |||||
| BIORAD | 100 | ||||
| EUROIMMUN | 964 | 964 | |||
| ABBOTT | 100 | 100 | 964 | ||
| LIAISON | 100 | 100 | 964 | 100 | |
| C | |||||
|---|---|---|---|---|---|
| ALL | |||||
| n = 168 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | |||||
| BIORAD | 0,8 | ||||
| EUROIMMUN | 0,7 | 0639 | |||
| ABBOTT | 075 | 082 | 069 | ||
| LIAISON | 064 | 061 | 071 | 076 | |
| Inpatients with SARS-CoV-2 positive PCR | |||||
|---|---|---|---|---|---|
| n = 20 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | |||||
| BIORAD | NA | ||||
| EUROIMMUN | NA | NA | |||
| ABBOTT | NA | NA | NA | ||
| LIAISON | NA | NA | NA | NA | |
| Outpatients with SARS-CoV-2 positive PCR | |||||
|---|---|---|---|---|---|
| n = 58 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | |||||
| BIORAD | 0,5 | ||||
| EUROIMMUN | 034 | 018 | |||
| ABBOTT | 041 | 061 | 041 | ||
| LIAISON | 035 | 021 | 066 | 047 | |
| Outpatients with no history of SARS-CoV-2 infection | |||||
|---|---|---|---|---|---|
| n = 62 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | |||||
| BIORAD | 0,9 | ||||
| EUROIMMUN | 073 | 069 | |||
| ABBOTT | 075 | 079 | 067 | ||
| LIAISON | 056 | 059 | 0,9 | 078 | |
| Patients with positive PCR for other human coronaviruses in 2019 | |||||
|---|---|---|---|---|---|
| n = 28 | WANTAI | BIORAD | EUROIMMUN | ABBOTT | LIAISON |
| WANTAI | |||||
| BIORAD | NA | ||||
| EUROIMMUN | NA | NA | |||
| ABBOTT | NA | NA | NA | ||
| LIAISON | NA | NA | NA | NA | |