Table 1 Serial interval by location, age of primary and secondary case and restriction level
Median Serial Interval | Mean Serial Interval (95% confidence intervals) | Standard deviation | Interquartile Range | Number of transmission events | |
|---|---|---|---|---|---|
Location | |||||
Dublin | 4 | 3.9 (3.4, 4.4) | 3.0 | 3 | 137 |
Rest of Country | 4 | 4.0 (3.7, 4.4) | 3.0 | 4 | 296 |
Age of primary case | |||||
0–18 | 4 | 3.4 (1.7, 5.1) | 3.6 | 4 | 17 |
18–25 | 4 | 4.4 (3.7, 5.1) | 2.9 | 3 | 65 |
25–40 | 4 | 4.3 (3.8, 4.7) | 2.8 | 3 | 141 |
40–65 | 4 | 3.9 (3.4, 4.4) | 3.1 | 4 | 170 |
≥ 65 | 3 | 2.9 (1.9, 3.8) | 3.0 | 4 | 40 |
Age of secondary case | |||||
0–18 | 4 | 4.6 (3.7, 5.5) | 3.3 | 5 | 50 |
18–25 | 3 | 3.9 (3.1, 4.6) | 3.1 | 4 | 60 |
25–40 | 4 | 4.4 (3.8, 4.9) | 3.0 | 2 | 121 |
40–65 | 4 | 3.7 (3.3, 4.2) | 2.9 | 3 | 160 |
≥ 65 | 3 | 3.3 (2.4, 4.2) | 3.0 | 3 | 42 |
Restriction level | |||||
Regional restrictions | 4 | 3.9 (3.3, 4.5) | 3.1 | 3.5 | 111 |
Stay at home phase: Start of study period (11th April 2020) to 5th May 2020 | 4 | 4.1 (3.3, 4.9) | 3.3 | 3 | 61 |
National level 3: 6th October 2020 to 15th October 2020 And 1st December 2020 to End of study period (13th December 2020) | 4 | 4.1 (3.6, 4.6) | 2.8 | 4 | 128 |
National level 5: 21st October 2020 to 1st December 2020 | 3 | 3.9 (3.4, 4.4) | 3.0 | 4 | 133 |