Table 3.

Number of cases of visceral leishmaniasis diagnosed in public hospitals in Mainland Portugal between 2010 and 2020, inclusively, and estimated mean annual incidence in this period, per 100,000 population, by NUTS (Nomenclature of Territorial Units for Statistics) 2 and NUTS3 region

Region	Average population in 2011–2021a	Number of VL cases	VL mean annual incidenceb	95% CI
Mainland Portugal	9,951,765	201	0.184	0.159–0.211
Norte	3,638,134	38	0.095	0.067–0.130
Alto Minho	238,051	1	0.038	0.001–0.213
Cávado	413,387	1	0.022	0.001–0.120
Ave	421,933	2	0.043	0.005–0.156
Área Metropolitana do Porto	1,747,876	15	0.078	0.044–0.129
Alto Tâmega	89,195	3	0.306	0.063–0.894
Tâmega e Sousa	420,776	6	0.130	0.048–0.282
Douro	194,516	4	0.187	0.051–0.479
Terras de Trás-os-Montes	112,399	5	0.404	0.131–0.944
Centro	2,277,497	38	0.152	0.107–0.208
Oeste	363,025	5	0.125	0.041–0.292
Região de Aveiro	368,898	4	0.099	0.027–0.252
Região de Coimbra	448,500	9	0.182	0.083–0.346
Região de Leiria	290,692	1	0.031	0.008–0.174
Viseu Dão Lafões	260,205	6	0.210	0.077–0.456
Beira Baixa	84,907	3	0.321	0.066–0.939
Médio Tejo	237,956	7	0.267	0.108–0.551
Beiras e Serra da Estrela	223,312	3	0.122	0.025–0.357
Área Metropolitana de Lisboa	2,846,042	81	0.259	0.206–0.322
Alentejo	730,917	19	0.236	0.142–0.369
Alentejo Litoral	97,183	1	0.094	0.002–0.521
Baixo Alentejo	120,777	7	0.527	0.212–1.086
Lezíria do Tejo	241,657	4	0.150	0.041–0.385
Alto Alentejo	111,714	6	0.488	0.179–1.063
Alentejo Central	159,585	1	0.057	0.001–0.317
Algarve	459,174	25	0.495	0.320–0.731

VL Visceral leishmaniasis, CI Confidence interval

^aArithmetic mean between the population size estimated in the National Census of 2011 and 2021

^bNumber of new cases per 100,000 population, per year. Based on the following formula: Incidence = (New Cases) / (Population x Timeframe)