Spatial-temporal distribution of human brucellosis in mainland China from 2004 to 2017 and an analysis of social and environmental factors

Table 4 Relationship between socio-economic, environmental, ecological factors and brucellosis incidence in mainland China between 2004 and 2017

Risk factors	Coefficient	Standardized coefficient
GDP (log-transformed)^a	0.7605**	0.2567**
Precipitation (mm)	− 0.0003	− 0.0666
Cattle (10⁴ heads)	− 0.0007	− 0.0734
Sheep (10⁴ heads)	0.0003*	0.1483*
Population density (person/km²) (log-transformed)¹	0.2531	0.0541
Climate (tropical)	1.0761	0.0417
Climate (mid-temperate)	4.9991**	0.7560**
Climate (warm-temperate)	3.1928**	0.5306**

^aThe visualization of GDPs and population density through 2004 and 2017 showed that the distributions of GDPs and population density were right-skewed. Thus, these two factors were log-transformed to normalize the distribution
*P < 0.05
**P < 0.01

ISSN: 1347-4715