Table 3 Two-by-two comparison of enteric infectious diseases and meteorological factors in Changsha, 2016–2020

Diseases

 Typhoid/paratyphoid

Non-flooding

General flooding

6.845

 < 0.001

Non-flooding

Heavy flooding

6.133

 < 0.001

General flooding

Heavy flooding

0.537

0.591

 Bacterial dysentery

Non-flooding

General flooding

6.698

 < 0.001

Non-flooding

Heavy flooding

4.859

 < 0.001

General flooding

Heavy flooding

0.440

0.660

 Other infectious diarrhea

Non-flooding

General flooding

0.900

0.368

Non-flooding

Heavy flooding

1.102

0.271

General flooding

Heavy flooding

0.418

0.676

Meteorological factor

 Average daily temperature (℃)

Non-flooding

General flooding

3.987

 < 0.001

Non-flooding

Heavy flooding

3.547

 < 0.001

General flooding

Heavy flooding

1.043

0.297

 Average daily relative humidity (%)

Non-flooding

General flooding

3.479

 < 0.001

Non-flooding

Heavy flooding

1.793

0.073

General flooding

Heavy flooding

0.435

0.663

 Total daily precipitation (mm)

Non-flooding

General flooding

3.692

 < 0.001

Non-flooding

Heavy flooding

1.454

0.146

General flooding

Heavy flooding

0.461

0.645

 24-h sunshine hours(h)

Non-flooding

General flooding

1.172

0.241

Non-flooding

Heavy flooding

0.515

0.607

General flooding

Heavy flooding

1.140

0.254

 Daily average atmospheric pressure (hPa)

Non-flooding

General flooding

5.255

 < 0.001

Non-flooding

Heavy flooding

4.103

 < 0.001

General flooding

Heavy flooding

0.052

0.958

 Daily average wind speed (m/s)

Non-flooding

General flooding

0.964

0.335

Non-flooding

Heavy flooding

0.464

0.642

General flooding

Heavy flooding

1.096

0.273