The hidden prevalence of leprosy: a comparative study between two Brazilian cities

Fernandes, Tânia Rita Moreno de Oliveira; Pereira, Anderson de Almeida; Cardoso, Lara Sodré; Alves Filho, Valdir Pereira; Rezende Junior, Luiz Sergio Nunes de; Souza, Carlos Dornesl Freire de

doi:10.1590/1806-9282.66.10.1338

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Revista da Associação Médica Brasileira

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Rapid Communication • Rev. Assoc. Med. Bras. 66 (10) • Oct 2020 • https://doi.org/10.1590/1806-9282.66.10.1338 copy

The hidden prevalence of leprosy: a comparative study between two Brazilian cities

Authorship SCIMAGO INSTITUTIONS RANKINGS

SUMMARY

OBJECTIVE:

We compared the hidden prevalence of leprosy in two Brazilian cities with distinct differences regarding geographic region and socio-economic development profile, namely, Juazeiro, Bahia and Joinville, Santa Catarina.

METHODS:

A retrospective epidemiological study based on secondary data obtained from leprosy case notifications in the cities of Juazeiro-BA and Joinville-SC, 2007-2017. To calculate hidden prevalence, we used the method proposed by Gil Suárez and Lombardi.

RESULTS:

Joinville had 105 cases of leprosy that went undiagnosed (addition of 42.0% to the registered prevalence). For Juazeiro, it was estimated that 295 cases went undiagnosed (addition of 18.9%).

CONCLUSION:

Joinville presents a higher hidden prevalence than Juazeiro.

KEYWORDS:
Leprosy; Epidemiology; Cross-sectional studies; Prevalence

(A) Juazeiro, Bahia
Year of diagnosis	Degree zero	Degree 1	Degree 2	Not rated	Total
Year of diagnosis	n (%)	n (%)	n (%)	n (%)	Total
2007	117 (73.6)	34 (21.4)	3 (1.9)	5 (3.1)	159
2008	113 (71.1)	29 (18.2)	14 (8.8)	3 (1.9)	159
2009	115 (79.9)	20 (13.9)	7 (4.9)	2 (1.4)	144
2010	152 (80.4)	27 (14.3)	8 (4.2)	2 (1.1)	189
2011	142 (82.1)	23 (13.3)	7 (4.0)	1 (0.6)	173
2012	129 (84.9)	14 (9.2)	7 (4.6)	2 (1.3)	152
2013	98 (76.6)	12 (9.4)	11 (8.6)	7 (5.5)	128
2014	99 (79.2)	191 (5.2)	3 (2.4)	4 (3.2)	125
2015	116 (87.2)	7 (5.3)	8 (6.0)	2 (1.5)	133
2016	72 (85.7)	8 (9.5)	4 (4.8)	0 (0.0)	84
2017	91(79.1)	15 (13.0)	9 (7.8)	0 (0.0)	115
Total	1244 (79.7)	208 (13.3)	81(5.2)	28 (1.8)	1561

(B) Joinville, Santa Catarina
Year of diagnosis	Degree zero	Degree 1	Degree 2	Not Rated	Total
Year of diagnosis	n (%)	n (%)	n (%)	n (%)	Total
2007	16 (72.7)	3 (13.6)	3 (13.6)	0 (0.0)	22
2008	11(47.8)	8 (34.8)	4 (17.4)	0 (0.0)	23
2009	16 (53.3)	11 (36.7)	3 (10.0)	0 (0.0)	30
2010	11(37.9)	17 (58.6)	0 (0.0)	1 (3.5)	29
2011	13 (48.1)	13 (48.1)	1 (3.7)	0 (0.0)	27
2012	17 (54.8)	8 (25.8)	6 (19.4)	0 (0.0)	31
2013	9 (64.3)	2 (14.3)	2 (14.3)	1 (7.1)	14
2014	17 (89.5)	0 (0.0)	2 (10.5)	0 (0.0)	19
2015	13 (65.0)	4 (20.0)	2 (10.0)	1 (5.0)	20
2016	10 (45.5)	4 (18.2)	7 (31.8)	1 (4.5)	22
2017	8 (61.5)	3 (23.1)	2 (15.4)	0 (0.0)	13
Total	141(56.4)	73 (29.2)	32 (12.8)	4 (1.6)	250

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[1] CORRESPONDING AUTHOR: Carlos Dornels Freire de Souza, Departamento de Medicina, Universidade Federal de Alagoas, Rodovia AL-115 s/n, Bom Sucesso, AL, Brasil – 57309-005 Tel: +55 82 3214-1100 / +55 87 99622-0698 E-mail: carlos.freire@arapiraca.ufal.br