Table 2.
Notification rates for cases of dengue in Italy (2010–2021). Crude incidence rates (CIR) were estimated assuming the total Italian population as the reference. Age-adjusted standardized rates (ASR) with their respective 95% confidence intervals (95% CI) were calculated assuming standard European Population as the reference. Incidence in travelers was calculated through official data of Italian Institute for Statistics on Travelers in countries other than European Union (ISTAT).
| Year | Incident Cases (No./1043, %) |
Autochtonous Cases (No./Incident Cases, %) |
CIR per 100,000 Persons (95% CI) |
ASR per 100,000 Persons (95% CI) |
Incidence per 100,000 Travellers (95% CI) |
|---|---|---|---|---|---|
| 2010 | 51, 4.9% | - | 0.085 (0.064; 0.087) | 0.075 (0.070; 0.081) | 0.325 (0.242; 0.427) |
| 2011 | 47, 4.5% | - | 0.060 (0.028; 0.091) | 0.130 (0.124; 0.135) | 0.360 (0.265; 0.479) |
| 2012 | 79, 7.6% | - | 0.074 (0.050; 0.098) | 0.234 (0.225; 0.243) | 0.541 (0.428; 0.673) |
| 2013 | 142, 13.6% | - | 0.131 (0.100; 0.162) | 0.131 (0.125; 0.138) | 1.248 (1.053; 1.470) |
| 2014 | 79, 7.6% | - | 0.111 (0.078; 0.145) | 0.178 (0.173; 0.184) | 0.857 (0.679; 1.067) |
| 2015 | 116, 11.1% | - | 0.141 (0.103; 0.179) | 0.191 (0.184; 0.197) | 1.147 (0.949; 1.374) |
| 2016 | 106, 10.2% | - | 0.186 (0.144; 0.227) | 0.159 (0.154; 0.164) | 1.137 (0.932; 1.374) |
| 2017 | 94, 9.0% | - | 0.111 (0.081; 0.141) | 0.183 (0.177; 0.190) | 0.808 (0.653; 0.987) |
| 2018 | 108, 10.4% | - | 0.205 (0.157; 0.253) | 0.197 (0.185; 0.209) | 0.997 (0.818; 1.202) |
| 2019 | 185, 17.7% | - | 0.227 (0.187; 0.267) | 0.328 (0.314; 0.341) | 1.514 (1.305; 1.746) |
| 2020 | 32, 3.1% | 11, 34.4% | 0.032 (0.001; 0.064) | 0.051 (0.048; 0.054) | 0.723 (0.448; 1.103) |
| 2021 | 4, 0.4% | - | 0.011 (0.001; 0.015) | 0.008 (0.004; 0.011) | - |
| POOLED | 1043, 100% | 11, 100% | 0.114 (0.071; 0.183) | 0.155 (0.105; 0.206) | 0.796 (0.599; 1.057) |