. 2021 Jan 8;26:4. doi: 10.1186/s12199-020-00927-9

Table 4.

Stratified analysis of the Poisson regression model in different age groups

Variables	Greater than or equal to 2 years old	Less than 2 years old
Population increase rate	1.022 (0.708,1.475)	0.953 (0.659, 1.378)	1.120 (0.792, 1.584)	0.982 (0.681, 1.425)
Population density	0.981 (0.809,1.191)	1.045 (0.843, 1.305)	0.962 (0.781, 1.186)	1.041 (0.799, 1.357)
GDP increase rate	0.750 (0.605,0.931)	0.914 (0.779,1.073)	0.741 (0.588, 0.934)	0.897 (0.744, 1.080)
Per capita public green areas	0.930 (0.798,1.084)	0.894 (0.779, 1.027)	0.887 (0.761, 1.034)	0.839 (0.723, 0.973)
City development	0.823 (0.741,0.913)	0.906 (0.836, 0.981)	0.826 (0.736, 0.926)	0.894 (0.815, 0.981)
Meteorological feature	0.786 (0.633,0.976)	0.738 (0.612, 0.889)	0.706 (0.560, 0.890)	0.659 (0.534, 0.813)
Intercept	0.007 (0.005,0.009)	–	0.013 (0.01, 0.017)	–

Variables

Greater than or equal to 2 years old

Less than 2 years old

RR ^b

RR ^a

RR ^b

RR ^a

Population increase rate

1.022

(0.708,1.475)

0.953

(0.659, 1.378)

1.120

(0.792, 1.584)

0.982

(0.681, 1.425)

Population density

0.981

(0.809,1.191)

1.045

(0.843, 1.305)

0.962

(0.781, 1.186)

1.041

(0.799, 1.357)

GDP increase rate

0.750

(0.605,0.931)

0.914

(0.779,1.073)

0.741

(0.588, 0.934)

0.897

(0.744, 1.080)

Per capita public green areas

0.930

(0.798,1.084)

0.894

(0.779, 1.027)

0.887

(0.761, 1.034)

0.839

(0.723, 0.973)

City development

0.823

(0.741,0.913)

0.906

(0.836, 0.981)

0.826

(0.736, 0.926)

0.894

(0.815, 0.981)

Meteorological feature

0.786

(0.633,0.976)

0.738

(0.612, 0.889)

0.706

(0.560, 0.890)

0.659

(0.534, 0.813)

Intercept

0.007

(0.005,0.009)

–

0.013

(0.01, 0.017)

–

^aThe crude RR for case-severity rate

^bThe adjusted RR in multivariate Poisson regression