Table 2 Definition and measurement of variables used in multilinear regression model

Length of time between onset of coordination and first case

Continuous

Length of the wave of the disease

Continuous

Peak attack rate

Continuous

Layered coordination mechanism

0 – Strategic and tactical

1 – Strategic, operational, and tactical

2 – Strategic and operational

3 – Operational or tactical

Income categorisation

1 – High income

2 – Upper middle income

3 – Lower middle income

4 – Low income

Average life expectancy

Continuous

GDP per capita

Continuous

Human development index

Continuous

Percentage population in the Urban region

Continuous

Global Health Security Index

Continuous

Current health expenditure (% of GDP)

Continuous

Infectious disease resilience index

Continuous