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Table 3 Retrospective analyses of space–time and spatial variation in temporal trend of Dengue incidence in Brazil Northeast, 2014–2017

From: Spatiotemporal dynamics, risk areas and social determinants of dengue in Northeastern Brazil, 2014–2017: an ecological study

a. Space–time

Cluster

Time period

States

Radium (km)

Number of municipalities

Number of cases

Annual rate/100 000

Relative risk

P-value

1

2015–2016

Alagoas, Pernambuco, Paraíba, Rio Grande do Norte and Ceará

533.39

808

287 252

524.3

4.07

< 0.001

2

2015–2016

Bahia (Itabuna)

0.0

1

25 906

5882.8

27.56

< 0.001

3

2016–2017

Maranhão

51.35

2

2153

1049.8

4.69

< 0.001

4

2015–2015

Bahia and Piauí

59.38

4

1012

1092.7

4.87

< 0.001

b. Spatial variation in temporal trend

Cluster

Inside time trend (%)

Localization

Radium (km)

Number of municipalities

Number of cases

Annual rate/100 000

Relative risk

P-value

1

10.53

Rio Grande do Norte and Ceará

155.93

82

101 814

466.3

2.35

0.001

2

84.89

Tocantins and Maranhão

287.79

41

8850

214.6

0.96

0.001

3

19.56

South of Bahia

288.43

65

38 094

434.6

2.01

0.001

4

2354.45

Agreste Pernambucano

11.76

2

662

351.2

1.57

0.001

5

192.11

South of Ceará

18.52

2

920

877.7

3.92

0.001

6

36.93

Ceará and Paraíba

28.82

6

5421

856.7

3.85

0.001

7

23.53

Pernambuco and Alagoas

32.32

14

6109

434.2

1.95

0.001

8

1365.01

West of Bahia

0.0

1

204

392.6

1.75

0.001

9

Inf

Sergipe

0.0

1

2

256.3

0.007

0.001

10

45.23

Zona da mata of Pernambuco

13.59

3

1626

319.6

1.43

0.001

11

3.14

East of Pernambuco and Paraíba

52.02

25

21 042

346.3

1.57

0.001

12

89.79

Agreste Pernambucano

0.0

1

358

181.4

0.81

0.001

13

2.87

East of Pernambuco

45.90

15

13 000

204.4

0.91

0.001

14

28.12

Sertão of Paraíba

12.32

3

1106

725.3

3.24

0.001

15

128.66

Sergipe

0.0

1

85

71.5

0.32

0.001

16

52.06

Paraíba

0.0

1

238

136.15

0.61

0.001

17

42.88

Pernambuco

11.19

3

273

119.9

0.53

0.001

18

17.80

Bahia

0.0

1

783

294.6

1.31

0.001

19

5.02

Pernambuco

18.94

5

2842

155.2

0.69

0.001

20

40.71

Bahia

40.75

2

242

67.9

0.30

0.001

21

28.15

Alagoas

0.0

1

385

383.7

1.71

0.001

22

4.28

Paraíba and Pernambuco

29.07

5

2543

1502.5

7.77

0.001

23

43.77

Pernambuco

0.0

1

157

157.7

0.70

0.001

24

Inf

Piauí

0.0

1

11

56.1

0.25

0.001

25

45.81

Alagoas

0.0

1

123

452.5

2.02

0.001

26

15.03

Piauí

117.04

30

488

40.2

0.18

0.001

27

19.66

Paraíba

0.0

1

327

248.4

1.11

0.001

28

25.48

Alagoas and Sergipe

25.48

4

722

213.0

0.95

0.001

  1. Inf Infinite