Table 2 Listeriosis in children aged 28 days to < 15 years from 1997 to 2016, characteristics and incidence
Characteristic of child | Total cases, count (%) n = 22 | Person-years (× 1,000,000)b | Incidence | IRR (95% CI) | p value |
|---|---|---|---|---|---|
Age (years) | |||||
29 days to < 1 year | 6 (27) | 1.19 | 0.51 (0.23, 1.10) | 1 | 0.006 |
1 to 4 | 8 (36) | 4.75 | 0.17 (0.09, 0.33) | 0.33 (0.12, 1.01) | 0.042 |
5 to 9 | 4 (18) | 5.97 | 0.07 (0.03, 0.17) | 0.13 (0.03, 0.46) | 0.002 |
10 to 14 | 4 (18) | 5.99 | 0.07 (0.03, 0.17) | 0.13 (0.03, 0.46) | 0.002 |
Sex | |||||
Female | 10 (45) | 8.72 | 0.11 (0.06, 0.21) | 0 | 0.759 |
Male | 12 (55) | 9.18 | 0.13 (0.07, 0.23) | 1.14 (0.49, 2.70) | 0.759 |
Ethnicity a | |||||
European or other | 7 (32) | 10.29 | 0.07 (0.03, 0.14) | 1 | 0.117 |
Māori | 5 (23) | 4.34 | 0.12 (0.05, 0.27) | 1.69 (0.50, 5.30) | 0.369 |
Pacific | 4 (18) | 1.65 | 0.24 (0.09, 0.62) | 3.56 (0.93, 11.78) | 0.043 |
Asian | 4 (18) | 1.62 | 0.25 (0.10, 0.63) | 3.63 (0.95, 12.01) | 0.040 |
Unknown | 2 | ||||
Overall | 22 | 17.90 | 0.12 (0.08, 0.19) | ||