Syphilis detection rate trend in aged people: Brazil, 2011–2019

An ecological, time-series study with data from the Notifiable Diseases Information System. The temporal trend of syphilis detection rates was analyzed according to the Prais-Winsten linear regression method.

Results:

62,765 cases of syphilis in aged people were reported. There was a growing trend in the rate of syphilis detection in aged people in Brazil. The increase was of approximately six times, with a mean increase of 25% each year (annual percent change [APC]: 25.0; 95%CI 22.1–28.1). The increase in the detection rate was identified in both genders and for all age groups, with emphasis on the increase in females (APC: 49.1; 95%CI 21.9–26.8) and in the group aged 70 to 79 years old (APC: 25.8; 95%CI 23.3–28.3). All macro-regions of the country showed an increasing trend, with emphasis on the Northeast (APC: 51.2; 95%CI 43.0–59.8) and South (APC: 49.2; 95%CI 32.3–68.3).

Conclusion:

The growing trend in the detection rate of syphilis in aged people throughout Brazil highlights the need for planning and developing effective and multidisciplinary prevention actions and assistance adapted to this public.

Keywords:
Syphilis; Aged; Health information systems; Time series studies

Characteristics		Detection rate		APC (%)	95%CI	p-value	Trend
Characteristics		2011	2019	APC (%)	95%CI	p-value	Trend
Gender
	Female	6.00	32.82	49.1	21.9–26.8	<0.001	Growing
	Male	10.32	62.10	25.5	22.1–29.0	<0.001	Growing
Age range (in years)
	60–69	9.45	53.76	24.7	21.5–28.0	<0.001	Growing
	70–79	6.76	40.99	25.8	23.3–28.3	<0.001	Growing
	≥80	4.44	25.38	25.1	22.0–28.2	<0.001	Growing
	Brazil	7.92	45.80	25.0	22.1–28.1	<0.001	Growing

Region/State	Detection rate		APC (%)	95%CI	p-value	Trend
Region/State	2011	2019	APC (%)	95%CI	p-value	Trend
North	1.94	45.80	49.1	42.2–56.3	<0.001	Growing
Rondônia^* * To calculate the APC, log=1 was considered for the states of Rondônia, Acre, Amapá, Roraima, and Tocantins in the year 2011.	0.00	37.67	74.9	34.6–127.3	<0.001	Growing
Acre^* * To calculate the APC, log=1 was considered for the states of Rondônia, Acre, Amapá, Roraima, and Tocantins in the year 2011.	0.00	16.11	53.2	32.3–77.3	<0.001	Growing
Amazonas	6.33	84.12	31.1	16.2–47.9	0.001	Growing
Roraima^* * To calculate the APC, log=1 was considered for the states of Rondônia, Acre, Amapá, Roraima, and Tocantins in the year 2011.	0.00	99.42	97.0	65.1–135.0	<0.001	Growing
Pará	0.53	28.41	77.8	56.8–79.7	<0.001	Growing
Amapá^* * To calculate the APC, log=1 was considered for the states of Rondônia, Acre, Amapá, Roraima, and Tocantins in the year 2011.	0.00	68.75	82.5	47.7–125.5	<0.001	Growing
Tocantins^* * To calculate the APC, log=1 was considered for the states of Rondônia, Acre, Amapá, Roraima, and Tocantins in the year 2011.	0.00	53.35	64.1	52.8–76.2	<0.001	Growing
Northeast	1.50	32.81	51.2	43.0–59.8	<0.001	Growing
Maranhão	0.17	25.06	83.1	58.7–111.2	<0.001	Growing
Piauí	0.58	23.82	57.6	46.2–69.8	<0.001	Growing
Ceará	3.71	16.55	23.0	1.2–49.6	0.041	Growing
Rio Grande do Norte	3.09	25.36	28.2	9.1–50.7	0.008	Growing
Paraíba	0.65	23.24	62.6	51.2–74.8	<0.001	Growing
Pernambuco	1.95	60.92	63.0	40.6–88.9	<0.001	Growing
Alagoas	0.35	7.55	62.5	29.9–103.3	0.001	Growing
Sergipe	1.03	18.57	28.8	1.8–62.9	0.039	Growing
Bahia	0.73	40.85	65.5	55.0–76.7	<0.001	Growing
Southeast	14.39	44.76	15.2	10.7–20.0	<0.001	Growing
Minas Gerais	2.34	34.29	43.5	37.0–50.2	<0.001	Growing
Espírito Santo	13.44	61.91	18.8	11.0–27.2	0.001	Growing
Rio de Janeiro	3.25	23.09	30.6	21.4–40.5	<0.001	Growing
São Paulo	25.11	57.31	10.8	4.6–17.4	0.004	Growing
South	2.48	69.92	49.2	32.3–68.3	<0.001	Growing
Paraná	1.86	91.80	62.6	47.9–78.8	<0.001	Growing
Santa Catarina	1.00	56.46	62.6	35.0–95.9	<0.001	Growing
Rio Grande do Sul	3.64	58.61	38.3	20.4–58.8	0.001	Growing
Center-West	5.72	40.09	34.7	30.2–39.3	<0.001	Growing
Mato Grosso do Sul	22.98	59.48	18.2	9.1–28.0	0.002	Growing
Mato Grosso	1.18	32.52	50.7	39.9–62.3	<0.001	Growing
Goiás	1.18	32.04	56.5	50.6–62.6	<0.001	Growing
Federal District	3.30	48.38	59.8	34.3–90.2	<0.001	Growing
Brazil	7.92	45.80	25.0	22.1–28.1	<0.001	Growing

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E-mail: revbrepi@usp.br

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[1] CORRESPONDING AUTHOR: Zildânya da Silva Barros. Avenida Frei Serafim, 2280, Centro, CEP: 64000-590, Teresina (PI), Brasil. E-mail: zildanya@hotmail.com