Table 2 Significant Spatial clusters of dengue in Nepal based on maximum reported cluster size from 2021–2023.

From: Spatial heterogenicity of tuberculosis and dengue in Nepal

Cluster

Location

Radius/KM

Incidence of Dengue/100,000

Observed cases

Expected cases

LLR

RR

p-value

01/01/2021-31/12/2021

Primary cluster

Sankhuwasabha

0

41.8

66

2.57

155.15

29.62

< 0.001

Secondary cluster

Myagdi

0

49.6

53

1.74

132.60

34.10

< 0.001

Secondary cluster

Okhaldhunga

Ramechhap

Khotang

Sindhuli

49.03

4.6

36

12.79

14.64

2.96

< 0.001

Secondary cluster

Gulmi

Baglung

Arghakhanchi

Parbat

Pyuthan

Palpa

43.71

3.5

45

20.86

11.11

2.28

< 0.001

Secondary cluster

Darchula

Bajhang

Baitadi

Dadeldhura

85.16

3.8

27

11.47

7.85

2.44

0.02

Secondary cluster

Kailali

0

3.4

31

14.73

7.08

2.18

0.037

01/01/2022-31/12/2022

Primary cluster

Lalitpur

Bhaktapur

Kathmandu

Makawanpur

27.11

1045.7

36,485

6145.13

48464.20

18.07

< 0.001

Secondary cluster

Gorkha

Lamjung

Dhading

43.76

245.5

1797

1289.39

91.49

1.41

< 0.001

Secondary cluster

Nawalpur

Tanahu

Parasi

Chitawan

38.39

200.7

3623

3178.57

31.77

1.15

< 0.001

Secondary cluster

Darchula

0

244.7

326

234.63

15.93

1.39

< 0.001

01/01/2023-31/12/2023

Primary cluster

Lamjung

Gorkha

Tanahu

Kaski

Manang

Dhading

63.90

478.4

7955

1551.65

7471.98

6.83

< 0.001

Secondary cluster

Bhojpur

Khotang

Dhankuta

Terhathum

Sankhuwasabha

Udayapur

Sunsari

59.90

353.6

7080

1868.46

4795.60

4.77

< 0.001

Secondary cluster

Ilam,

Panchthar

28.82

180.0

815

422.58

145.77

1.96

< 0.001

Secondary cluster

Bhaktapur

0

177.8

770

404.06

133.08

1.93

< 0.001

Secondary cluster

Palpa

0

185.7

456

229.11

87.93

2.01

< 0.001

Secondary cluster

Darchula

0

202.1

270

124.65

63.73

2.18

< 0.001

Secondary cluster

Gulmi

Baglung

Arghakhanchi

30.39

123.1

830

629.09

29.89

1.33

< 0.001

Secondary cluster

Rasuwa

Nuwakot

Sindhupalchok

Kathmandu

51.02

102.5

2684

2444.46

12.53

1.11

< 0.001

  1. LLR = Log Likelihood Ratio;
  2. RR = Relative Risk; p < 0.05 indicates statistical significance.
  3. KM = Kilometer.